viewBinding

app/build.gradle

@@ -1,13 +1,14 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
+//apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-parcelize'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'de.timfreiheit.resourceplaceholders'
 apply plugin: 'com.google.firebase.crashlytics'
 
-androidExtensions {
+//androidExtensions {
-    experimental = true
+//    experimental = true
-}
+//}
 
 static def releaseTime() {
     return new Date().format("yy.MMddHH", TimeZone.getTimeZone("GMT+8"))
@@ -50,6 +51,9 @@ android {
             }
         }
     }
+    buildFeatures {
+        viewBinding true
+    }
     buildTypes {
         release {
             if (project.hasProperty("RELEASE_STORE_FILE")) {

app/src/main/java/io/legado/app/base/BaseActivity.kt

@@ -5,11 +5,13 @@ import android.content.res.Configuration
 import android.os.Build
 import android.os.Bundle
 import android.util.AttributeSet
+import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.widget.FrameLayout
 import androidx.appcompat.app.AppCompatActivity
+import androidx.viewbinding.ViewBinding
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.AppConst
@@ -22,10 +24,10 @@ import io.legado.app.utils.*
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.cancel
+import java.lang.reflect.ParameterizedType
 
 
-abstract class BaseActivity(
+abstract class BaseActivity<VB : ViewBinding>(
-    private val layoutID: Int,
     val fullScreen: Boolean = true,
     private val theme: Theme = Theme.Auto,
     private val toolBarTheme: Theme = Theme.Auto,
@@ -33,6 +35,16 @@ abstract class BaseActivity(
 ) : AppCompatActivity(),
     CoroutineScope by MainScope() {
 
+    @Suppress("UNCHECKED_CAST")
+    protected val binding: VB by lazy {
+        //使用反射得到viewBinding的class
+        val type = javaClass.genericSuperclass as ParameterizedType
+        val aClass = type.actualTypeArguments[0] as Class<*>
+        val method = aClass.getDeclaredMethod("inflate", LayoutInflater::class.java)
+        method.invoke(null, layoutInflater) as VB
+    }
+
+
     val isInMultiWindow: Boolean
         get() {
             return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
@@ -63,7 +75,7 @@ abstract class BaseActivity(
         initTheme()
         setupSystemBar()
         super.onCreate(savedInstanceState)
-        setContentView(layoutID)
+        setContentView(binding.root)
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
             findViewById<TitleBar>(R.id.title_bar)
                 ?.onMultiWindowModeChanged(isInMultiWindowMode, fullScreen)

app/src/main/java/io/legado/app/base/BaseFragment.kt

@@ -58,7 +58,7 @@ abstract class BaseFragment(layoutID: Int) : Fragment(layoutID),
     }
 
     private fun onMultiWindowModeChanged() {
-        (activity as? BaseActivity)?.let {
+        (activity as? BaseActivity<*>)?.let {
             view?.findViewById<TitleBar>(R.id.title_bar)
                 ?.onMultiWindowModeChanged(it.isInMultiWindow, it.fullScreen)
         }

app/src/main/java/io/legado/app/base/VMBaseActivity.kt

@@ -1,14 +1,14 @@
 package io.legado.app.base
 
 import androidx.lifecycle.ViewModel
+import androidx.viewbinding.ViewBinding
 import io.legado.app.constant.Theme
 
-abstract class VMBaseActivity<VM : ViewModel>(
+abstract class VMBaseActivity<VB : ViewBinding, VM : ViewModel>(
-    layoutID: Int,
     fullScreen: Boolean = true,
     theme: Theme = Theme.Auto,
     toolBarTheme: Theme = Theme.Auto
-) : BaseActivity(layoutID, fullScreen, theme, toolBarTheme) {
+) : BaseActivity<VB>(fullScreen, theme, toolBarTheme) {
 
     protected abstract val viewModel: VM
 

app/src/main/java/io/legado/app/data/entities/Book.kt

@@ -10,8 +10,8 @@ import io.legado.app.service.help.ReadBook
 import io.legado.app.utils.GSON
 import io.legado.app.utils.MD5Utils
 import io.legado.app.utils.fromJsonObject
-import kotlinx.android.parcel.IgnoredOnParcel
+import kotlinx.parcelize.IgnoredOnParcel
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 import java.nio.charset.Charset
 import kotlin.math.max
 import kotlin.math.min

app/src/main/java/io/legado/app/data/entities/BookChapter.kt

@@ -10,8 +10,8 @@ import io.legado.app.utils.GSON
 import io.legado.app.utils.MD5Utils
 import io.legado.app.utils.NetworkUtils
 import io.legado.app.utils.fromJsonObject
-import kotlinx.android.parcel.IgnoredOnParcel
+import kotlinx.parcelize.IgnoredOnParcel
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 
 
 @Parcelize

app/src/main/java/io/legado/app/data/entities/BookGroup.kt

@@ -6,7 +6,7 @@ import androidx.room.Entity
 import androidx.room.PrimaryKey
 import io.legado.app.R
 import io.legado.app.constant.AppConst
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 
 @Parcelize
 @Entity(tableName = "book_groups")

app/src/main/java/io/legado/app/data/entities/BookSource.kt

@@ -15,7 +15,7 @@ import io.legado.app.utils.ACache
 import io.legado.app.utils.GSON
 import io.legado.app.utils.fromJsonObject
 import io.legado.app.utils.splitNotBlank
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 import javax.script.SimpleBindings
 
 @Parcelize

app/src/main/java/io/legado/app/data/entities/Bookmark.kt

@@ -4,7 +4,7 @@ import android.os.Parcelable
 import androidx.room.Entity
 import androidx.room.Index
 import androidx.room.PrimaryKey
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 
 @Parcelize
 @Entity(tableName = "bookmarks", indices = [(Index(value = ["time"], unique = true))])

app/src/main/java/io/legado/app/data/entities/ReplaceRule.kt

@@ -6,7 +6,7 @@ import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.Index
 import androidx.room.PrimaryKey
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 import java.util.regex.Pattern
 import java.util.regex.PatternSyntaxException
 
@@ -43,17 +43,17 @@ data class ReplaceRule(
 
     fun isValid(): Boolean{
         if (TextUtils.isEmpty(pattern)){
-            return false;
+            return false
         }
         //判断正则表达式是否正确
         if (isRegex){
             try {
-                Pattern.compile(pattern);
+                Pattern.compile(pattern)
             }
             catch (ex: PatternSyntaxException){
-                return false;
+                return false
             }
         }
-        return true;
+        return true
     }
 }

app/src/main/java/io/legado/app/data/entities/RssSource.kt

@@ -11,7 +11,7 @@ import io.legado.app.help.JsExtensions
 import io.legado.app.help.http.CookieStore
 import io.legado.app.utils.GSON
 import io.legado.app.utils.fromJsonObject
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 import java.util.*
 import javax.script.SimpleBindings
 

app/src/main/java/io/legado/app/data/entities/SearchBook.kt

@@ -4,8 +4,8 @@ import android.os.Parcelable
 import androidx.room.*
 import io.legado.app.utils.GSON
 import io.legado.app.utils.fromJsonObject
-import kotlinx.android.parcel.IgnoredOnParcel
+import kotlinx.parcelize.IgnoredOnParcel
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 
 @Parcelize
 @Entity(

app/src/main/java/io/legado/app/data/entities/SearchKeyword.kt

@@ -4,7 +4,7 @@ import android.os.Parcelable
 import androidx.room.Entity
 import androidx.room.Index
 import androidx.room.PrimaryKey
-import kotlinx.android.parcel.Parcelize
+import kotlinx.parcelize.Parcelize
 
 
 @Parcelize

app/src/main/java/io/legado/app/help/ReadBookConfig.kt

@@ -4,7 +4,6 @@ import android.graphics.Color
 import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.ColorDrawable
 import android.graphics.drawable.Drawable
-import android.os.Parcelable
 import androidx.annotation.Keep
 import io.legado.app.App
 import io.legado.app.R
@@ -12,7 +11,6 @@ import io.legado.app.constant.PreferKey
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import io.legado.app.utils.*
-import kotlinx.android.parcel.Parcelize
 import java.io.File
 
 /**
@@ -358,7 +356,6 @@ object ReadBookConfig {
     }
 
     @Keep
-    @Parcelize
     class Config(
         var name: String = "",
         var bgStr: String = "#EEEEEE",//白天背景
@@ -409,7 +406,7 @@ object ReadBookConfig {
         var tipColor: Int = 0,
         var headerMode: Int = 0,
         var footerMode: Int = 0
-    ) : Parcelable {
+    ) {
 
         fun setCurTextColor(color: Int) {
             when {

app/src/main/java/io/legado/app/lib/theme/ATH.kt

@@ -24,7 +24,6 @@ import io.legado.app.help.AppConfig
 import io.legado.app.utils.ColorUtils
 import io.legado.app.utils.dp
 import io.legado.app.utils.getCompatColor
-import kotlinx.android.synthetic.main.activity_main.view.*
 import org.jetbrains.anko.backgroundColor
 
 
@@ -258,7 +257,7 @@ object ATH {
             val textColor = context.getSecondaryTextColor(textIsDark)
             val colorStateList = Selector.colorBuild()
                 .setDefaultColor(textColor)
-                .setSelectedColor(ThemeStore.accentColor(bottom_navigation_view.context)).create()
+                .setSelectedColor(ThemeStore.accentColor(context)).create()
             itemIconTintList = colorStateList
             itemTextColor = colorStateList
         }

app/src/main/java/io/legado/app/ui/about/AboutActivity.kt

@@ -8,34 +8,34 @@ import android.view.Menu
 import android.view.MenuItem
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.databinding.ActivityAboutBinding
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.utils.openUrl
-import kotlinx.android.synthetic.main.activity_about.*
 import org.jetbrains.anko.share
 
 
-class AboutActivity : BaseActivity(R.layout.activity_about) {
+class AboutActivity : BaseActivity<ActivityAboutBinding>() {
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        ll_about.background = ATH.getDialogBackground()
+        binding.llAbout.background = ATH.getDialogBackground()
         val fTag = "aboutFragment"
         var aboutFragment = supportFragmentManager.findFragmentByTag(fTag)
         if (aboutFragment == null) aboutFragment = AboutFragment()
         supportFragmentManager.beginTransaction()
             .replace(R.id.fl_fragment, aboutFragment, fTag)
             .commit()
-        tv_app_summary.post {
+        binding.tvAppSummary.post {
             try {
                 val span = ForegroundColorSpan(accentColor)
-                val spannableString = SpannableString(tv_app_summary.text)
+                val spannableString = SpannableString(binding.tvAppSummary.text)
                 val gzh = getString(R.string.legado_gzh)
                 val start = spannableString.indexOf(gzh)
                 spannableString.setSpan(
                     span, start, start + gzh.length,
                     Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
                 )
-                tv_app_summary.text = spannableString
+                binding.tvAppSummary.text = spannableString
             } catch (e: Exception) {
                 e.printStackTrace()
             }

app/src/main/java/io/legado/app/ui/about/DonateActivity.kt

@@ -4,13 +4,14 @@ package io.legado.app.ui.about
 import android.os.Bundle
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.databinding.ActivityDonateBinding
 
 /**
  * Created by GKF on 2018/1/13.
  * 捐赠页面
  */
 
-class DonateActivity : BaseActivity(R.layout.activity_donate) {
+class DonateActivity : BaseActivity<ActivityDonateBinding>() {
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         val fTag = "donateFragment"

app/src/main/java/io/legado/app/ui/about/ReadRecordActivity.kt

@@ -8,17 +8,16 @@ import io.legado.app.base.BaseActivity
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.ReadRecordShow
+import io.legado.app.databinding.ActivityReadRecordBinding
+import io.legado.app.databinding.ItemReadRecordBinding
 import io.legado.app.lib.dialogs.alert
-import kotlinx.android.synthetic.main.activity_read_record.*
-import kotlinx.android.synthetic.main.item_read_record.*
-import kotlinx.android.synthetic.main.item_read_record.view.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.jetbrains.anko.sdk27.listeners.onClick
 
-class ReadRecordActivity : BaseActivity(R.layout.activity_read_record) {
+class ReadRecordActivity : BaseActivity<ActivityReadRecordBinding>() {
 
     lateinit var adapter: RecordAdapter
 
@@ -28,10 +27,10 @@ class ReadRecordActivity : BaseActivity(R.layout.activity_read_record) {
     }
 
     private fun initView() {
-        tv_book_name.setText(R.string.all_read_time)
+        binding.readRecord.tvBookName.setText(R.string.all_read_time)
         adapter = RecordAdapter(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        iv_remove.onClick {
+        binding.readRecord.ivRemove.onClick {
             alert(R.string.delete, R.string.sure_del) {
                 okButton {
                     App.db.readRecordDao().clear()
@@ -46,7 +45,7 @@ class ReadRecordActivity : BaseActivity(R.layout.activity_read_record) {
         launch(IO) {
             val allTime = App.db.readRecordDao().allTime
             withContext(Main) {
-                tv_read_time.text = formatDuring(allTime)
+                binding.readRecord.tvReadTime.text = formatDuring(allTime)
             }
             val readRecords = App.db.readRecordDao().allShow
             withContext(Main) {
@@ -63,15 +62,15 @@ class ReadRecordActivity : BaseActivity(R.layout.activity_read_record) {
             item: ReadRecordShow,
             payloads: MutableList<Any>
         ) {
-            holder.itemView.apply {
+            ItemReadRecordBinding.bind(holder.itemView).apply {
-                tv_book_name.text = item.bookName
+                tvBookName.text = item.bookName
-                tv_read_time.text = formatDuring(item.readTime)
+                tvReadTime.text = formatDuring(item.readTime)
             }
         }
 
         override fun registerListener(holder: ItemViewHolder) {
-            holder.itemView.apply {
+            ItemReadRecordBinding.bind(holder.itemView).apply {
-                iv_remove.onClick {
+                ivRemove.onClick {
                     alert(R.string.delete, R.string.sure_del) {
                         okButton {
                             getItem(holder.layoutPosition)?.let {

app/src/main/java/io/legado/app/ui/association/FileAssociationActivity.kt

@@ -2,18 +2,17 @@ package io.legado.app.ui.association
 
 import android.content.Intent
 import android.os.Bundle
-import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Theme
+import io.legado.app.databinding.ActivityTranslucenceBinding
 import io.legado.app.ui.main.MainActivity
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_translucence.*
 import org.jetbrains.anko.startActivity
 import org.jetbrains.anko.toast
 
 
-class FileAssociationActivity : VMBaseActivity<FileAssociationViewModel>(
+class FileAssociationActivity :
-    R.layout.activity_translucence,
+    VMBaseActivity<ActivityTranslucenceBinding, FileAssociationViewModel>(
         theme = Theme.Transparent
     ) {
 
@@ -21,14 +20,14 @@ class FileAssociationActivity : VMBaseActivity<FileAssociationViewModel>(
         get() = getViewModel(FileAssociationViewModel::class.java)
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        rotate_loading.show()
+        binding.rotateLoading.show()
         viewModel.errorLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             toast(it)
             finish()
         })
         viewModel.successLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             startActivity(it)
             finish()
         })

app/src/main/java/io/legado/app/ui/association/ImportBookSourceActivity.kt

@@ -4,15 +4,15 @@ import android.os.Bundle
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Theme
+import io.legado.app.databinding.ActivityTranslucenceBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_translucence.*
 import org.jetbrains.anko.toast
 
 
-class ImportBookSourceActivity : VMBaseActivity<ImportBookSourceViewModel>(
+class ImportBookSourceActivity :
-    R.layout.activity_translucence,
+    VMBaseActivity<ActivityTranslucenceBinding, ImportBookSourceViewModel>(
         theme = Theme.Transparent
     ) {
 
@@ -20,13 +20,13 @@ class ImportBookSourceActivity : VMBaseActivity<ImportBookSourceViewModel>(
         get() = getViewModel(ImportBookSourceViewModel::class.java)
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        rotate_loading.show()
+        binding.rotateLoading.show()
         viewModel.errorLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             errorDialog(it)
         })
         viewModel.successLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             if (it > 0) {
                 successDialog()
             } else {
@@ -61,7 +61,7 @@ class ImportBookSourceActivity : VMBaseActivity<ImportBookSourceViewModel>(
                     }
                 }
                 else -> {
-                    rotate_loading.hide()
+                    binding.rotateLoading.hide()
                     toast(R.string.wrong_format)
                     finish()
                 }

app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleActivity.kt

@@ -2,32 +2,35 @@ package io.legado.app.ui.association
 
 import android.os.Bundle
 import io.legado.app.App
-import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Theme
 import io.legado.app.data.entities.ReplaceRule
+import io.legado.app.databinding.ActivityTranslucenceBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_translucence.*
 import org.jetbrains.anko.toast
 
-class ImportReplaceRuleActivity : VMBaseActivity<ImportReplaceRuleViewModel>(
+class ImportReplaceRuleActivity :
-    R.layout.activity_translucence,
+    VMBaseActivity<ActivityTranslucenceBinding, ImportReplaceRuleViewModel>(
         theme = Theme.Transparent
     ) {
 
     override val viewModel: ImportReplaceRuleViewModel
         get() = getViewModel(ImportReplaceRuleViewModel::class.java)
 
+    override fun getViewBinding(): ActivityTranslucenceBinding {
+        return ActivityTranslucenceBinding.inflate(layoutInflater)
+    }
+
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        rotate_loading.show()
+        binding.rotateLoading.show()
         viewModel.errorLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             errorDialog(it)
         })
         viewModel.successLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             if (it.size > 0) {
                 successDialog(it)
             } else {
@@ -62,7 +65,7 @@ class ImportReplaceRuleActivity : VMBaseActivity<ImportReplaceRuleViewModel>(
                     }
                 }
                 else -> {
-                    rotate_loading.hide()
+                    binding.rotateLoading.hide()
                     toast("格式不对")
                     finish()
                 }

app/src/main/java/io/legado/app/ui/association/ImportRssSourceActivity.kt

@@ -4,14 +4,14 @@ import android.os.Bundle
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Theme
+import io.legado.app.databinding.ActivityTranslucenceBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_translucence.*
 import org.jetbrains.anko.toast
 
-class ImportRssSourceActivity : VMBaseActivity<ImportRssSourceViewModel>(
+class ImportRssSourceActivity :
-    R.layout.activity_translucence,
+    VMBaseActivity<ActivityTranslucenceBinding, ImportRssSourceViewModel>(
         theme = Theme.Transparent
     ) {
 
@@ -19,13 +19,13 @@ class ImportRssSourceActivity : VMBaseActivity<ImportRssSourceViewModel>(
         get() = getViewModel(ImportRssSourceViewModel::class.java)
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        rotate_loading.show()
+        binding.rotateLoading.show()
         viewModel.errorLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             errorDialog(it)
         })
         viewModel.successLiveData.observe(this, {
-            rotate_loading.hide()
+            binding.rotateLoading.hide()
             if (it > 0) {
                 successDialog()
             } else {
@@ -60,7 +60,7 @@ class ImportRssSourceActivity : VMBaseActivity<ImportRssSourceViewModel>(
                     }
                 }
                 else -> {
-                    rotate_loading.hide()
+                    binding.rotateLoading.hide()
                     toast(R.string.wrong_format)
                     finish()
                 }

app/src/main/java/io/legado/app/ui/audio/AudioPlayActivity.kt

@@ -17,6 +17,7 @@ import io.legado.app.constant.EventBus
 import io.legado.app.constant.Status
 import io.legado.app.constant.Theme
 import io.legado.app.data.entities.Book
+import io.legado.app.databinding.ActivityAudioPlayBinding
 import io.legado.app.help.BlurTransformation
 import io.legado.app.help.ImageLoader
 import io.legado.app.lib.dialogs.alert
@@ -25,7 +26,6 @@ import io.legado.app.ui.book.changesource.ChangeSourceDialog
 import io.legado.app.ui.book.toc.ChapterListActivity
 import io.legado.app.ui.widget.image.CoverImageView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_audio_play.*
 import org.apache.commons.lang3.time.DateFormatUtils
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.sdk27.listeners.onLongClick
@@ -33,7 +33,7 @@ import org.jetbrains.anko.startActivityForResult
 
 
 class AudioPlayActivity :
-    VMBaseActivity<AudioPlayViewModel>(R.layout.activity_audio_play, toolBarTheme = Theme.Dark),
+    VMBaseActivity<ActivityAudioPlayBinding, AudioPlayViewModel>(toolBarTheme = Theme.Dark),
     ChangeSourceDialog.CallBack {
 
     override val viewModel: AudioPlayViewModel
@@ -43,8 +43,8 @@ class AudioPlayActivity :
     private var adjustProgress = false
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        title_bar.transparent()
+        binding.titleBar.transparent()
-        AudioPlay.titleData.observe(this, { title_bar.title = it })
+        AudioPlay.titleData.observe(this, { binding.titleBar.title = it })
         AudioPlay.coverData.observe(this, { upCover(it) })
         viewModel.initData(intent)
         initView()
@@ -65,22 +65,22 @@ class AudioPlayActivity :
     }
 
     private fun initView() {
-        fab_play_stop.onClick {
+        binding.fabPlayStop.onClick {
             playButton()
         }
-        fab_play_stop.onLongClick {
+        binding.fabPlayStop.onLongClick {
             AudioPlay.stop(this)
             true
         }
-        iv_skip_next.onClick {
+        binding.ivSkipNext.onClick {
             AudioPlay.next(this)
         }
-        iv_skip_previous.onClick {
+        binding.ivSkipPrevious.onClick {
             AudioPlay.prev(this)
         }
-        player_progress.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+        binding.playerProgress.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
             override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
-                tv_dur_time.text = DateFormatUtils.format(progress.toLong(), "mm:ss")
+                binding.tvDurTime.text = DateFormatUtils.format(progress.toLong(), "mm:ss")
             }
 
             override fun onStartTrackingTouch(seekBar: SeekBar?) {
@@ -89,10 +89,10 @@ class AudioPlayActivity :
 
             override fun onStopTrackingTouch(seekBar: SeekBar?) {
                 adjustProgress = false
-                AudioPlay.adjustProgress(this@AudioPlayActivity, player_progress.progress)
+                AudioPlay.adjustProgress(this@AudioPlayActivity, binding.playerProgress.progress)
             }
         })
-        iv_chapter.onClick {
+        binding.ivChapter.onClick {
             AudioPlay.book?.let {
                 startActivityForResult<ChapterListActivity>(
                     requestCodeChapter,
@@ -101,13 +101,13 @@ class AudioPlayActivity :
             }
         }
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
-            iv_fast_rewind.invisible()
+            binding.ivFastRewind.invisible()
-            iv_fast_forward.invisible()
+            binding.ivFastForward.invisible()
         }
-        iv_fast_forward.onClick {
+        binding.ivFastForward.onClick {
             AudioPlay.adjustSpeed(this, 0.1f)
         }
-        iv_fast_rewind.onClick {
+        binding.ivFastRewind.onClick {
             AudioPlay.adjustSpeed(this, -0.1f)
         }
     }
@@ -116,12 +116,12 @@ class AudioPlayActivity :
         ImageLoader.load(this, path)
             .placeholder(CoverImageView.defaultDrawable)
             .error(CoverImageView.defaultDrawable)
-            .into(iv_cover)
+            .into(binding.ivCover)
         ImageLoader.load(this, path)
             .transition(DrawableTransitionOptions.withCrossFade(1500))
             .thumbnail(defaultCover())
             .apply(bitmapTransform(BlurTransformation(this, 25)))
-            .into(iv_bg)
+            .into(binding.ivBg)
     }
 
     private fun defaultCover(): RequestBuilder<Drawable> {
@@ -190,26 +190,26 @@ class AudioPlayActivity :
         observeEventSticky<Int>(EventBus.AUDIO_STATE) {
             AudioPlay.status = it
             if (it == Status.PLAY) {
-                fab_play_stop.setImageResource(R.drawable.ic_pause_24dp)
+                binding.fabPlayStop.setImageResource(R.drawable.ic_pause_24dp)
             } else {
-                fab_play_stop.setImageResource(R.drawable.ic_play_24dp)
+                binding.fabPlayStop.setImageResource(R.drawable.ic_play_24dp)
             }
         }
         observeEventSticky<String>(EventBus.AUDIO_SUB_TITLE) {
-            tv_sub_title.text = it
+            binding.tvSubTitle.text = it
         }
         observeEventSticky<Int>(EventBus.AUDIO_SIZE) {
-            player_progress.max = it
+            binding.playerProgress.max = it
-            tv_all_time.text = DateFormatUtils.format(it.toLong(), "mm:ss")
+            binding.tvAllTime.text = DateFormatUtils.format(it.toLong(), "mm:ss")
         }
         observeEventSticky<Int>(EventBus.AUDIO_PROGRESS) {
             AudioPlay.durPageIndex = it
-            if (!adjustProgress) player_progress.progress = it
+            if (!adjustProgress) binding.playerProgress.progress = it
-            tv_dur_time.text = DateFormatUtils.format(it.toLong(), "mm:ss")
+            binding.tvDurTime.text = DateFormatUtils.format(it.toLong(), "mm:ss")
         }
         observeEventSticky<Float>(EventBus.AUDIO_SPEED) {
-            tv_speed.text = String.format("%.1fX", it)
+            binding.tvSpeed.text = String.format("%.1fX", it)
-            tv_speed.visible()
+            binding.tvSpeed.visible()
         }
     }
 

app/src/main/java/io/legado/app/ui/book/arrange/ArrangeBookActivity.kt

@@ -14,6 +14,7 @@ import io.legado.app.constant.AppConst
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookGroup
+import io.legado.app.databinding.ActivityArrangeBookBinding
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.ATH
 import io.legado.app.ui.book.group.GroupManageDialog
@@ -24,10 +25,9 @@ import io.legado.app.ui.widget.recycler.ItemTouchCallback
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.getPrefInt
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_arrange_book.*
 
 
-class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activity_arrange_book),
+class ArrangeBookActivity : VMBaseActivity<ActivityArrangeBookBinding, ArrangeBookViewModel>(),
     PopupMenu.OnMenuItemClickListener,
     SelectActionBar.CallBack,
     ArrangeBookAdapter.CallBack,
@@ -45,7 +45,7 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         groupId = intent.getLongExtra("groupId", -1)
-        title_bar.subtitle = intent.getStringExtra("groupName") ?: getString(R.string.all)
+        binding.titleBar.subtitle = intent.getStringExtra("groupName") ?: getString(R.string.all)
         initView()
         initGroupData()
         initBookData()
@@ -75,24 +75,24 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
     }
 
     private fun initView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
         adapter = ArrangeBookAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
         val itemTouchCallback = ItemTouchCallback(adapter)
         itemTouchCallback.isCanDrag = getPrefInt(PreferKey.bookshelfSort) == 3
         val dragSelectTouchHelper: DragSelectTouchHelper =
             DragSelectTouchHelper(adapter.initDragSelectTouchHelperCallback()).setSlideArea(16, 50)
-        dragSelectTouchHelper.attachToRecyclerView(recycler_view)
+        dragSelectTouchHelper.attachToRecyclerView(binding.recyclerView)
         // When this page is opened, it is in selection mode
         dragSelectTouchHelper.activeSlideSelect()
         // Note: need judge selection first, so add ItemTouchHelper after it.
-        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(recycler_view)
+        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(binding.recyclerView)
-        select_action_bar.setMainActionText(R.string.move_to_group)
+        binding.selectActionBar.setMainActionText(R.string.move_to_group)
-        select_action_bar.inflateMenu(R.menu.arrange_book_sel)
+        binding.selectActionBar.inflateMenu(R.menu.arrange_book_sel)
-        select_action_bar.setOnMenuItemClickListener(this)
+        binding.selectActionBar.setOnMenuItemClickListener(this)
-        select_action_bar.setCallBack(this)
+        binding.selectActionBar.setCallBack(this)
     }
 
     private fun initGroupData() {
@@ -133,7 +133,7 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
             R.id.menu_group_manage -> GroupManageDialog()
                 .show(supportFragmentManager, "groupManage")
             else -> if (item.groupId == R.id.menu_group) {
-                title_bar.subtitle = item.title
+                binding.titleBar.subtitle = item.title
                 groupId = App.db.bookGroupDao().getByName(item.title.toString())?.groupId ?: 0
                 initBookData()
             }
@@ -195,7 +195,7 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
     }
 
     override fun upSelectCount() {
-        select_action_bar.upCountView(adapter.selectedBooks().size, adapter.getItems().size)
+        binding.selectActionBar.upCountView(adapter.selectedBooks().size, adapter.getItems().size)
     }
 
     override fun updateBook(vararg book: Book) {

app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt

@@ -17,13 +17,13 @@ import io.legado.app.constant.PreferKey
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookGroup
+import io.legado.app.databinding.ActivityCacheBookBinding
 import io.legado.app.help.BookHelp
 import io.legado.app.service.help.CacheBook
 import io.legado.app.ui.filepicker.FilePicker
 import io.legado.app.ui.filepicker.FilePickerDialog
 import io.legado.app.ui.widget.dialog.TextListDialog
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_download.*
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.launch
@@ -32,7 +32,7 @@ import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.CopyOnWriteArraySet
 
 
-class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download),
+class CacheActivity : VMBaseActivity<ActivityCacheBookBinding, CacheViewModel>(),
     FilePickerDialog.CallBack,
     CacheAdapter.CallBack {
     private val exportRequestCode = 32
@@ -50,7 +50,7 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         groupId = intent.getLongExtra("groupId", -1)
-        title_bar.subtitle = intent.getStringExtra("groupName") ?: getString(R.string.all)
+        binding.titleBar.subtitle = intent.getStringExtra("groupName") ?: getString(R.string.all)
         initRecyclerView()
         initGroupData()
         initBookData()
@@ -96,7 +96,7 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
                 TextListDialog.show(supportFragmentManager, getString(R.string.log), CacheBook.logs)
             }
             else -> if (item.groupId == R.id.menu_group) {
-                title_bar.subtitle = item.title
+                binding.titleBar.subtitle = item.title
                 groupId = App.db.bookGroupDao().getByName(item.title.toString())?.groupId ?: 0
                 initBookData()
             }
@@ -105,9 +105,9 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
     }
 
     private fun initRecyclerView() {
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
         adapter = CacheAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
     }
 
     private fun initBookData() {
@@ -194,10 +194,10 @@ class CacheActivity : VMBaseActivity<CacheViewModel>(R.layout.activity_download)
 
     private fun startExport(path: String) {
         adapter.getItem(exportPosition)?.let { book ->
-            Snackbar.make(title_bar, R.string.exporting, Snackbar.LENGTH_INDEFINITE)
+            Snackbar.make(binding.titleBar, R.string.exporting, Snackbar.LENGTH_INDEFINITE)
                 .show()
             viewModel.export(path, book) {
-                title_bar.snackbar(it)
+                binding.titleBar.snackbar(it)
             }
         }
     }

app/src/main/java/io/legado/app/ui/book/changecover/CoverAdapter.kt

@@ -5,16 +5,16 @@ import io.legado.app.R
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.SearchBook
-import kotlinx.android.synthetic.main.item_cover.view.*
+import io.legado.app.databinding.ItemCoverBinding
 import org.jetbrains.anko.sdk27.listeners.onClick
 
 class CoverAdapter(context: Context, val callBack: CallBack) :
     SimpleRecyclerAdapter<SearchBook>(context, R.layout.item_cover) {
 
     override fun convert(holder: ItemViewHolder, item: SearchBook, payloads: MutableList<Any>) {
-        with(holder.itemView) {
+        ItemCoverBinding.bind(holder.itemView).apply {
-            iv_cover.load(item.coverUrl, item.name, item.author)
+            ivCover.load(item.coverUrl, item.name, item.author)
-            tv_source.text = item.originName
+            tvSource.text = item.originName
         }
     }
 

app/src/main/java/io/legado/app/ui/book/explore/ExploreShowActivity.kt

@@ -7,14 +7,14 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.SearchBook
+import io.legado.app.databinding.ActivityExploreShowBinding
 import io.legado.app.ui.book.info.BookInfoActivity
 import io.legado.app.ui.widget.recycler.LoadMoreView
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_explore_show.*
 import org.jetbrains.anko.startActivity
 
-class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activity_explore_show),
+class ExploreShowActivity : VMBaseActivity<ActivityExploreShowBinding, ExploreShowViewModel>(),
     ExploreShowAdapter.CallBack {
     override val viewModel: ExploreShowViewModel
         get() = getViewModel(ExploreShowViewModel::class.java)
@@ -24,7 +24,7 @@ class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activi
     private var isLoading = true
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        title_bar.title = intent.getStringExtra("exploreName")
+        binding.titleBar.title = intent.getStringExtra("exploreName")
         initRecyclerView()
         viewModel.booksData.observe(this, { upData(it) })
         viewModel.initData(intent)
@@ -32,9 +32,9 @@ class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activi
 
     private fun initRecyclerView() {
         adapter = ExploreShowAdapter(this, this)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
         loadMoreView = LoadMoreView(this)
         adapter.addFooterView(loadMoreView)
         loadMoreView.startLoad()
@@ -45,7 +45,7 @@ class ExploreShowActivity : VMBaseActivity<ExploreShowViewModel>(R.layout.activi
                 isLoading = true
             }
         }
-        recycler_view.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+        binding.recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
             override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                 super.onScrolled(recyclerView, dx, dy)
                 if (!recyclerView.canScrollVertically(1)) {

app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt

@@ -18,6 +18,7 @@ import io.legado.app.constant.BookType
 import io.legado.app.constant.Theme
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
+import io.legado.app.databinding.ActivityBookInfoBinding
 import io.legado.app.help.BlurTransformation
 import io.legado.app.help.ImageLoader
 import io.legado.app.help.IntentDataHelp
@@ -36,7 +37,6 @@ import io.legado.app.ui.book.source.edit.BookSourceEditActivity
 import io.legado.app.ui.book.toc.ChapterListActivity
 import io.legado.app.ui.widget.image.CoverImageView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_info.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.startActivity
 import org.jetbrains.anko.startActivityForResult
@@ -44,7 +44,7 @@ import org.jetbrains.anko.toast
 
 
 class BookInfoActivity :
-    VMBaseActivity<BookInfoViewModel>(R.layout.activity_book_info, toolBarTheme = Theme.Dark),
+    VMBaseActivity<ActivityBookInfoBinding, BookInfoViewModel>(toolBarTheme = Theme.Dark),
     GroupSelectDialog.CallBack,
     ChapterListAdapter.CallBack,
     ChangeSourceDialog.CallBack,
@@ -59,13 +59,13 @@ class BookInfoActivity :
 
     @SuppressLint("PrivateResource")
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        title_bar.transparent()
+        binding.titleBar.transparent()
-        arc_view.setBgColor(backgroundColor)
+        binding.arcView.setBgColor(backgroundColor)
-        ll_info.setBackgroundColor(backgroundColor)
+        binding.llInfo.setBackgroundColor(backgroundColor)
-        scroll_view.setBackgroundColor(backgroundColor)
+        binding.scrollView.setBackgroundColor(backgroundColor)
-        fl_action.setBackgroundColor(bottomBackground)
+        binding.flAction.setBackgroundColor(bottomBackground)
-        tv_shelf.setTextColor(getPrimaryTextColor(ColorUtils.isColorLight(bottomBackground)))
+        binding.tvShelf.setTextColor(getPrimaryTextColor(ColorUtils.isColorLight(bottomBackground)))
-        tv_toc.text = getString(R.string.toc_s, getString(R.string.loading))
+        binding.tvToc.text = getString(R.string.toc_s, getString(R.string.loading))
         viewModel.bookData.observe(this, { showBook(it) })
         viewModel.chapterListData.observe(this, { upLoading(false, it) })
         viewModel.initData(intent)
@@ -133,29 +133,29 @@ class BookInfoActivity :
 
     private fun showBook(book: Book) {
         showCover(book)
-        tv_name.text = book.name
+        binding.tvName.text = book.name
-        tv_author.text = getString(R.string.author_show, book.getRealAuthor())
+        binding.tvAuthor.text = getString(R.string.author_show, book.getRealAuthor())
-        tv_origin.text = getString(R.string.origin_show, book.originName)
+        binding.tvOrigin.text = getString(R.string.origin_show, book.originName)
-        tv_lasted.text = getString(R.string.lasted_show, book.latestChapterTitle)
+        binding.tvLasted.text = getString(R.string.lasted_show, book.latestChapterTitle)
-        tv_intro.text = book.getDisplayIntro()
+        binding.tvIntro.text = book.getDisplayIntro()
         upTvBookshelf()
         val kinds = book.getKindList()
         if (kinds.isEmpty()) {
-            lb_kind.gone()
+            binding.lbKind.gone()
         } else {
-            lb_kind.visible()
+            binding.lbKind.visible()
-            lb_kind.setLabels(kinds)
+            binding.lbKind.setLabels(kinds)
         }
         upGroup(book.group)
     }
 
     private fun showCover(book: Book) {
-        iv_cover.load(book.getDisplayCover(), book.name, book.author)
+        binding.ivCover.load(book.getDisplayCover(), book.name, book.author)
         ImageLoader.load(this, book.getDisplayCover())
             .transition(DrawableTransitionOptions.withCrossFade(1500))
             .thumbnail(defaultCover())
             .apply(bitmapTransform(BlurTransformation(this, 25)))
-            .into(bg_book)  //模糊、渐变、缩小效果
+            .into(binding.bgBook)  //模糊、渐变、缩小效果
     }
 
     private fun defaultCover(): RequestBuilder<Drawable> {
@@ -166,18 +166,18 @@ class BookInfoActivity :
     private fun upLoading(isLoading: Boolean, chapterList: List<BookChapter>? = null) {
         when {
             isLoading -> {
-                tv_toc.text = getString(R.string.toc_s, getString(R.string.loading))
+                binding.tvToc.text = getString(R.string.toc_s, getString(R.string.loading))
             }
             chapterList.isNullOrEmpty() -> {
-                tv_toc.text = getString(R.string.toc_s, getString(R.string.error_load_toc))
+                binding.tvToc.text = getString(R.string.toc_s, getString(R.string.error_load_toc))
             }
             else -> {
                 viewModel.bookData.value?.let {
                     if (it.durChapterIndex < chapterList.size) {
-                        tv_toc.text =
+                        binding.tvToc.text =
                             getString(R.string.toc_s, chapterList[it.durChapterIndex].title)
                     } else {
-                        tv_toc.text = getString(R.string.toc_s, chapterList.last().title)
+                        binding.tvToc.text = getString(R.string.toc_s, chapterList.last().title)
                     }
                 }
             }
@@ -186,34 +186,34 @@ class BookInfoActivity :
 
     private fun upTvBookshelf() {
         if (viewModel.inBookshelf) {
-            tv_shelf.text = getString(R.string.remove_from_bookshelf)
+            binding.tvShelf.text = getString(R.string.remove_from_bookshelf)
         } else {
-            tv_shelf.text = getString(R.string.add_to_shelf)
+            binding.tvShelf.text = getString(R.string.add_to_shelf)
         }
     }
 
     private fun upGroup(groupId: Long) {
         viewModel.loadGroup(groupId) {
             if (it.isNullOrEmpty()) {
-                tv_group.text = getString(R.string.group_s, getString(R.string.no_group))
+                binding.tvGroup.text = getString(R.string.group_s, getString(R.string.no_group))
             } else {
-                tv_group.text = getString(R.string.group_s, it)
+                binding.tvGroup.text = getString(R.string.group_s, it)
             }
         }
     }
 
     private fun initOnClick() {
-        iv_cover.onClick {
+        binding.ivCover.onClick {
             viewModel.bookData.value?.let {
                 ChangeCoverDialog.show(supportFragmentManager, it.name, it.author)
             }
         }
-        tv_read.onClick {
+        binding.tvRead.onClick {
             viewModel.bookData.value?.let {
                 readBook(it)
             }
         }
-        tv_shelf.onClick {
+        binding.tvShelf.onClick {
             if (viewModel.inBookshelf) {
                 deleteBook()
             } else {
@@ -222,17 +222,17 @@ class BookInfoActivity :
                 }
             }
         }
-        tv_origin.onClick {
+        binding.tvOrigin.onClick {
             viewModel.bookData.value?.let {
                 startActivity<BookSourceEditActivity>(Pair("data", it.origin))
             }
         }
-        tv_change_source.onClick {
+        binding.tvChangeSource.onClick {
             viewModel.bookData.value?.let {
                 ChangeSourceDialog.show(supportFragmentManager, it.name, it.author)
             }
         }
-        tv_toc_view.onClick {
+        binding.tvTocView.onClick {
             if (!viewModel.inBookshelf) {
                 viewModel.saveBook {
                     viewModel.saveChapterList {
@@ -243,15 +243,15 @@ class BookInfoActivity :
                 openChapterList()
             }
         }
-        tv_change_group.onClick {
+        binding.tvChangeGroup.onClick {
             viewModel.bookData.value?.let {
                 GroupSelectDialog.show(supportFragmentManager, it.group)
             }
         }
-        tv_author.onClick {
+        binding.tvAuthor.onClick {
             startActivity<SearchActivity>(Pair("key", viewModel.bookData.value?.author))
         }
-        tv_name.onClick {
+        binding.tvName.onClick {
             startActivity<SearchActivity>(Pair("key", viewModel.bookData.value?.name))
         }
     }

app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt

@@ -10,17 +10,17 @@ import androidx.documentfile.provider.DocumentFile
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.data.entities.Book
+import io.legado.app.databinding.ActivityBookInfoEditBinding
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.ui.book.changecover.ChangeCoverDialog
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_info_edit.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.toast
 import java.io.File
 
 class BookInfoEditActivity :
-    VMBaseActivity<BookInfoEditViewModel>(R.layout.activity_book_info_edit),
+    VMBaseActivity<ActivityBookInfoEditBinding, BookInfoEditViewModel>(),
     ChangeCoverDialog.CallBack {
 
     private val resultSelectCover = 132
@@ -51,41 +51,41 @@ class BookInfoEditActivity :
     }
 
     private fun initEvent() {
-        tv_change_cover.onClick {
+        binding.tvChangeCover.onClick {
             viewModel.bookData.value?.let {
                 ChangeCoverDialog.show(supportFragmentManager, it.name, it.author)
             }
         }
-        tv_select_cover.onClick {
+        binding.tvSelectCover.onClick {
             selectImage()
         }
-        tv_refresh_cover.onClick {
+        binding.tvRefreshCover.onClick {
-            viewModel.book?.customCoverUrl = tie_cover_url.text?.toString()
+            viewModel.book?.customCoverUrl = binding.tieCoverUrl.text?.toString()
             upCover()
         }
     }
 
     private fun upView(book: Book) {
-        tie_book_name.setText(book.name)
+        binding.tieBookName.setText(book.name)
-        tie_book_author.setText(book.author)
+        binding.tieBookAuthor.setText(book.author)
-        tie_cover_url.setText(book.getDisplayCover())
+        binding.tieCoverUrl.setText(book.getDisplayCover())
-        tie_book_intro.setText(book.getDisplayIntro())
+        binding.tieBookIntro.setText(book.getDisplayIntro())
         upCover()
     }
 
     private fun upCover() {
         viewModel.book.let {
-            iv_cover.load(it?.getDisplayCover(), it?.name, it?.author)
+            binding.ivCover.load(it?.getDisplayCover(), it?.name, it?.author)
         }
     }
 
     private fun saveData() {
         viewModel.book?.let { book ->
-            book.name = tie_book_name.text?.toString() ?: ""
+            book.name = binding.tieBookName.text?.toString() ?: ""
-            book.author = tie_book_author.text?.toString() ?: ""
+            book.author = binding.tieBookAuthor.text?.toString() ?: ""
-            val customCoverUrl = tie_cover_url.text?.toString()
+            val customCoverUrl = binding.tieCoverUrl.text?.toString()
             book.customCoverUrl = if (customCoverUrl == book.coverUrl) null else customCoverUrl
-            book.customIntro = tie_book_intro.text?.toString()
+            book.customIntro = binding.tieBookIntro.text?.toString()
             viewModel.saveBook(book) {
                 setResult(Activity.RESULT_OK)
                 finish()
@@ -102,7 +102,7 @@ class BookInfoEditActivity :
 
     override fun coverChangeTo(coverUrl: String) {
         viewModel.book?.customCoverUrl = coverUrl
-        tie_cover_url.setText(coverUrl)
+        binding.tieCoverUrl.setText(coverUrl)
         upCover()
     }
 

app/src/main/java/io/legado/app/ui/book/local/ImportBookActivity.kt

@@ -15,6 +15,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivityImportBookBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
@@ -23,7 +24,6 @@ import io.legado.app.ui.filepicker.FilePicker
 import io.legado.app.ui.filepicker.FilePickerDialog
 import io.legado.app.ui.widget.SelectActionBar
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_import_book.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
 import kotlinx.coroutines.launch
@@ -36,7 +36,7 @@ import java.util.*
 /**
  * 导入本地书籍界面
  */
-class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity_import_book),
+class ImportBookActivity : VMBaseActivity<ActivityImportBookBinding, ImportBookViewModel>(),
     FilePickerDialog.CallBack,
     PopupMenu.OnMenuItemClickListener,
     SelectActionBar.CallBack,
@@ -97,18 +97,18 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
     }
 
     private fun initView() {
-        lay_top.setBackgroundColor(backgroundColor)
+        binding.layTop.setBackgroundColor(backgroundColor)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
         adapter = ImportBookAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        select_action_bar.setMainActionText(R.string.add_to_shelf)
+        binding.selectActionBar.setMainActionText(R.string.add_to_shelf)
-        select_action_bar.inflateMenu(R.menu.import_book_sel)
+        binding.selectActionBar.inflateMenu(R.menu.import_book_sel)
-        select_action_bar.setOnMenuItemClickListener(this)
+        binding.selectActionBar.setOnMenuItemClickListener(this)
-        select_action_bar.setCallBack(this)
+        binding.selectActionBar.setCallBack(this)
     }
 
     private fun initEvent() {
-        tv_go_back.onClick {
+        binding.tvGoBack.onClick {
             goBackDir()
         }
     }
@@ -125,14 +125,14 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
         val lastPath = AppConfig.importBookPath
         when {
             lastPath.isNullOrEmpty() -> {
-                tv_empty_msg.visible()
+                binding.tvEmptyMsg.visible()
                 FilePicker.selectFolder(this, requestCodeSelectFolder)
             }
             lastPath.isContentScheme() -> {
                 val rootUri = Uri.parse(lastPath)
                 rootDoc = DocumentFile.fromTreeUri(this, rootUri)
                 if (rootDoc == null) {
-                    tv_empty_msg.visible()
+                    binding.tvEmptyMsg.visible()
                     FilePicker.selectFolder(this, requestCodeSelectFolder)
                 } else {
                     subDocs.clear()
@@ -140,11 +140,11 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
                 }
             }
             Build.VERSION.SDK_INT > Build.VERSION_CODES.Q -> {
-                tv_empty_msg.visible()
+                binding.tvEmptyMsg.visible()
                 FilePicker.selectFolder(this, requestCodeSelectFolder)
             }
             else -> {
-                tv_empty_msg.visible()
+                binding.tvEmptyMsg.visible()
                 PermissionsCompat.Builder(this)
                     .addPermissions(*Permissions.Group.STORAGE)
                     .rationale(R.string.tip_perm_request_storage)
@@ -167,14 +167,14 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
     }
 
     private fun upDocs(rootDoc: DocumentFile) {
-        tv_empty_msg.gone()
+        binding.tvEmptyMsg.gone()
         var path = rootDoc.name.toString() + File.separator
         var lastDoc = rootDoc
         for (doc in subDocs) {
             lastDoc = doc
             path = path + doc.name + File.separator
         }
-        tv_path.text = path
+        binding.tvPath.text = path
         adapter.selectedUris.clear()
         adapter.clearItems()
         launch(IO) {
@@ -198,8 +198,8 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
     }
 
     private fun upFiles() {
-        tv_empty_msg.gone()
+        binding.tvEmptyMsg.gone()
-        tv_path.text = path.replace(sdPath, "SD")
+        binding.tvPath.text = path.replace(sdPath, "SD")
         val docList = arrayListOf<DocItem>()
         File(path).listFiles()?.forEach {
             if (it.isDirectory) {
@@ -238,11 +238,11 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
         rootDoc?.let { doc ->
             adapter.clearItems()
             val lastDoc = subDocs.lastOrNull() ?: doc
-            refresh_progress_bar.isAutoLoading = true
+            binding.refreshProgressBar.isAutoLoading = true
             launch(IO) {
                 viewModel.scanDoc(lastDoc, true, find) {
                     launch {
-                        refresh_progress_bar.isAutoLoading = false
+                        binding.refreshProgressBar.isAutoLoading = false
                     }
                 }
             }
@@ -253,11 +253,11 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
             } else {
                 adapter.clearItems()
                 val file = File(path)
-                refresh_progress_bar.isAutoLoading = true
+                binding.refreshProgressBar.isAutoLoading = true
                 launch(IO) {
                     viewModel.scanFile(file, true, find) {
                         launch {
-                            refresh_progress_bar.isAutoLoading = false
+                            binding.refreshProgressBar.isAutoLoading = false
                         }
                     }
                 }
@@ -332,7 +332,7 @@ class ImportBookActivity : VMBaseActivity<ImportBookViewModel>(R.layout.activity
     }
 
     override fun upCountView() {
-        select_action_bar.upCountView(adapter.selectedUris.size, adapter.checkableCount)
+        binding.selectActionBar.upCountView(adapter.selectedUris.size, adapter.checkableCount)
     }
 
 }

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -41,14 +41,13 @@ import io.legado.app.ui.book.read.page.PageView
 import io.legado.app.ui.book.read.page.TextPageFactory
 import io.legado.app.ui.book.read.page.entities.PageDirection
 import io.legado.app.ui.book.searchContent.SearchContentActivity
+import io.legado.app.ui.book.source.edit.BookSourceEditActivity
 import io.legado.app.ui.book.toc.ChapterListActivity
 import io.legado.app.ui.login.SourceLogin
 import io.legado.app.ui.replace.ReplaceRuleActivity
 import io.legado.app.ui.replace.edit.ReplaceEditActivity
 import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_read.*
-import kotlinx.android.synthetic.main.view_read_menu.*
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
@@ -74,12 +73,13 @@ class ReadBookActivity : ReadBookBaseActivity(),
     private val requestCodeChapterList = 568
     private val requestCodeReplace = 312
     private val requestCodeSearchResult = 123
+    private val requestCodeEditSource = 111
     private var menu: Menu? = null
     private var textActionMenu: TextActionMenu? = null
 
     override val scope: CoroutineScope get() = this
     override val isInitFinish: Boolean get() = viewModel.isInitFinish
-    override val isScroll: Boolean get() = page_view.isScroll
+    override val isScroll: Boolean get() = binding.pageView.isScroll
     private val mHandler = Handler(Looper.getMainLooper())
     private val keepScreenRunnable: Runnable =
         Runnable { keepScreenOn(window, false) }
@@ -89,19 +89,20 @@ class ReadBookActivity : ReadBookBaseActivity(),
     private var screenTimeOut: Long = 0
     private var timeBatteryReceiver: TimeBatteryReceiver? = null
     private var loadStates: Boolean = false
-    override val pageFactory: TextPageFactory get() = page_view.pageFactory
+    override val pageFactory: TextPageFactory get() = binding.pageView.pageFactory
-    override val headerHeight: Int get() = page_view.curPage.headerHeight
+    override val headerHeight: Int get() = binding.pageView.curPage.headerHeight
 
+    @SuppressLint("ClickableViewAccessibility")
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)
-        cursor_left.setColorFilter(accentColor)
+        binding.cursorLeft.setColorFilter(accentColor)
-        cursor_right.setColorFilter(accentColor)
+        binding.cursorRight.setColorFilter(accentColor)
-        cursor_left.setOnTouchListener(this)
+        binding.cursorLeft.setOnTouchListener(this)
-        cursor_right.setOnTouchListener(this)
+        binding.cursorRight.setOnTouchListener(this)
         upScreenTimeOut()
         ReadBook.callBack = this
         ReadBook.titleDate.observe(this) {
-            title_bar.title = it
+            binding.readMenu.setTitle(it)
             upMenu()
             upView()
         }
@@ -115,7 +116,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
 
     override fun onConfigurationChanged(newConfig: Configuration) {
         super.onConfigurationChanged(newConfig)
-        page_view.upStatusBar()
+        binding.pageView.upStatusBar()
         ReadBook.loadContent(resetPageOffset = false)
     }
 
@@ -124,7 +125,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
         ReadBook.readStartTime = System.currentTimeMillis()
         upSystemUiVisibility()
         timeBatteryReceiver = TimeBatteryReceiver.register(this)
-        page_view.upTime()
+        binding.pageView.upTime()
     }
 
     override fun onPause() {
@@ -180,7 +181,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
     override fun onCompatOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
             R.id.menu_change_source -> {
-                read_menu.runMenuOut()
+                binding.readMenu.runMenuOut()
                 ReadBook.book?.let {
                     ChangeSourceDialog.show(supportFragmentManager, it.name, it.author)
                 }
@@ -188,7 +189,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
             R.id.menu_refresh -> {
                 ReadBook.book?.let {
                     ReadBook.curTextChapter = null
-                    page_view.upContent()
+                    binding.pageView.upContent()
                     viewModel.refreshContent(it)
                 }
             }
@@ -210,7 +211,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
                 ReadBook.loadContent(false)
             }
             R.id.menu_page_anim -> showPageAnimConfig {
-                page_view.upPageAnim()
+                binding.pageView.upPageAnim()
             }
             R.id.menu_book_info -> ReadBook.book?.let {
                 startActivity<BookInfoActivity>(
@@ -243,12 +244,12 @@ class ReadBookActivity : ReadBookBaseActivity(),
         val isDown = action == 0
 
         if (keyCode == KeyEvent.KEYCODE_MENU) {
-            if (isDown && !read_menu.cnaShowMenu) {
+            if (isDown && !binding.readMenu.cnaShowMenu) {
-                read_menu.runMenuIn()
+                binding.readMenu.runMenuIn()
                 return true
             }
-            if (!isDown && !read_menu.cnaShowMenu) {
+            if (!isDown && !binding.readMenu.cnaShowMenu) {
-                read_menu.cnaShowMenu = true
+                binding.readMenu.cnaShowMenu = true
                 return true
             }
         }
@@ -262,13 +263,13 @@ class ReadBookActivity : ReadBookBaseActivity(),
         when {
             isPrevKey(keyCode) -> {
                 if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
-                    page_view.pageDelegate?.keyTurnPage(PageDirection.PREV)
+                    binding.pageView.pageDelegate?.keyTurnPage(PageDirection.PREV)
                     return true
                 }
             }
             isNextKey(keyCode) -> {
                 if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
-                    page_view.pageDelegate?.keyTurnPage(PageDirection.NEXT)
+                    binding.pageView.pageDelegate?.keyTurnPage(PageDirection.NEXT)
                     return true
                 }
             }
@@ -283,7 +284,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
                 }
             }
             keyCode == KeyEvent.KEYCODE_SPACE -> {
-                page_view.pageDelegate?.keyTurnPage(PageDirection.NEXT)
+                binding.pageView.pageDelegate?.keyTurnPage(PageDirection.NEXT)
                 return true
             }
         }
@@ -344,13 +345,13 @@ class ReadBookActivity : ReadBookBaseActivity(),
             MotionEvent.ACTION_DOWN -> textActionMenu?.dismiss()
             MotionEvent.ACTION_MOVE -> {
                 when (v.id) {
-                    R.id.cursor_left -> page_view.curPage.selectStartMove(
+                    R.id.cursor_left -> binding.pageView.curPage.selectStartMove(
-                        event.rawX + cursor_left.width,
+                        event.rawX + binding.cursorLeft.width,
-                        event.rawY - cursor_left.height
+                        event.rawY - binding.cursorLeft.height
                     )
-                    R.id.cursor_right -> page_view.curPage.selectEndMove(
+                    R.id.cursor_right -> binding.pageView.curPage.selectEndMove(
-                        event.rawX - cursor_right.width,
+                        event.rawX - binding.cursorRight.width,
-                        event.rawY - cursor_right.height
+                        event.rawY - binding.cursorRight.height
                     )
                 }
             }
@@ -363,28 +364,28 @@ class ReadBookActivity : ReadBookBaseActivity(),
      * 更新文字选择开始位置
      */
     override fun upSelectedStart(x: Float, y: Float, top: Float) {
-        cursor_left.x = x - cursor_left.width
+        binding.cursorLeft.x = x - binding.cursorLeft.width
-        cursor_left.y = y
+        binding.cursorLeft.y = y
-        cursor_left.visible(true)
+        binding.cursorLeft.visible(true)
-        text_menu_position.x = x
+        binding.textMenuPosition.x = x
-        text_menu_position.y = top
+        binding.textMenuPosition.y = top
     }
 
     /**
      * 更新文字选择结束位置
      */
     override fun upSelectedEnd(x: Float, y: Float) {
-        cursor_right.x = x
+        binding.cursorRight.x = x
-        cursor_right.y = y
+        binding.cursorRight.y = y
-        cursor_right.visible(true)
+        binding.cursorRight.visible(true)
     }
 
     /**
      * 取消文字选择
      */
     override fun onCancelSelect() {
-        cursor_left.invisible()
+        binding.cursorLeft.invisible()
-        cursor_right.invisible()
+        binding.cursorRight.invisible()
         textActionMenu?.dismiss()
     }
 
@@ -398,16 +399,16 @@ class ReadBookActivity : ReadBookBaseActivity(),
         textActionMenu?.let { popup ->
             popup.contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED)
             val popupHeight = popup.contentView.measuredHeight
-            val x = text_menu_position.x.toInt()
+            val x = binding.textMenuPosition.x.toInt()
-            var y = text_menu_position.y.toInt() - popupHeight
+            var y = binding.textMenuPosition.y.toInt() - popupHeight
             if (y < statusBarHeight) {
-                y = (cursor_left.y + cursor_left.height).toInt()
+                y = (binding.cursorLeft.y + binding.cursorLeft.height).toInt()
             }
-            if (cursor_right.y > y && cursor_right.y < y + popupHeight) {
+            if (binding.cursorRight.y > y && binding.cursorRight.y < y + popupHeight) {
-                y = (cursor_right.y + cursor_right.height).toInt()
+                y = (binding.cursorRight.y + binding.cursorRight.height).toInt()
             }
             if (!popup.isShowing) {
-                popup.showAtLocation(text_menu_position, Gravity.TOP or Gravity.START, x, y)
+                popup.showAtLocation(binding.textMenuPosition, Gravity.TOP or Gravity.START, x, y)
             } else {
                 popup.update(x, y, WRAP_CONTENT, WRAP_CONTENT)
             }
@@ -417,7 +418,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
     /**
      * 当前选择的文本
      */
-    override val selectedText: String get() = page_view.curPage.selectedText
+    override val selectedText: String get() = binding.pageView.curPage.selectedText
 
     /**
      * 文本选择菜单操作
@@ -453,21 +454,21 @@ class ReadBookActivity : ReadBookBaseActivity(),
      */
     override fun onMenuActionFinally() {
         textActionMenu?.dismiss()
-        page_view.curPage.cancelSelect()
+        binding.pageView.curPage.cancelSelect()
-        page_view.isTextSelected = false
+        binding.pageView.isTextSelected = false
     }
 
     /**
      * 音量键翻页
      */
     private fun volumeKeyPage(direction: PageDirection): Boolean {
-        if (!read_menu.isVisible) {
+        if (!binding.readMenu.isVisible) {
             if (getPrefBoolean("volumeKeyPage", true)) {
                 if (getPrefBoolean("volumeKeyPageOnPlay")
                     || BaseReadAloudService.pause
                 ) {
-                    page_view.pageDelegate?.isCancel = false
+                    binding.pageView.pageDelegate?.isCancel = false
-                    page_view.pageDelegate?.keyTurnPage(direction)
+                    binding.pageView.pageDelegate?.keyTurnPage(direction)
                     return true
                 }
             }
@@ -497,8 +498,8 @@ class ReadBookActivity : ReadBookBaseActivity(),
     override fun upContent(relativePosition: Int, resetPageOffset: Boolean) {
         autoPageProgress = 0
         launch {
-            page_view.upContent(relativePosition, resetPageOffset)
+            binding.pageView.upContent(relativePosition, resetPageOffset)
-            seek_read_page.progress = ReadBook.durPageIndex
+            binding.readMenu.setSeekPage(ReadBook.durPageIndex)
         }
         loadStates = false
     }
@@ -508,29 +509,13 @@ class ReadBookActivity : ReadBookBaseActivity(),
      */
     override fun upView() {
         launch {
-            ReadBook.curTextChapter?.let {
+            binding.readMenu.upBookView()
-                tv_chapter_name.text = it.title
-                tv_chapter_name.visible()
-                if (!ReadBook.isLocalBook) {
-                    tv_chapter_url.text = it.url
-                    tv_chapter_url.visible()
-                } else {
-                    tv_chapter_url.gone()
-                }
-                seek_read_page.max = it.pageSize.minus(1)
-                seek_read_page.progress = ReadBook.durPageIndex
-                tv_pre.isEnabled = ReadBook.durChapterIndex != 0
-                tv_next.isEnabled = ReadBook.durChapterIndex != ReadBook.chapterSize - 1
-            } ?: let {
-                tv_chapter_name.gone()
-                tv_chapter_url.gone()
-            }
         }
     }
 
     override fun upPageAnim() {
         launch {
-            page_view.upPageAnim()
+            binding.pageView.upPageAnim()
         }
     }
 
@@ -540,7 +525,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
     override fun pageChanged() {
         autoPageProgress = 0
         launch {
-            seek_read_page.progress = ReadBook.durPageIndex
+            binding.readMenu.setSeekPage(ReadBook.durPageIndex)
         }
     }
 
@@ -548,7 +533,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
      * 显示菜单
      */
     override fun showMenuBar() {
-        read_menu.runMenuIn()
+        binding.readMenu.runMenuIn()
     }
 
     override val oldBook: Book?
@@ -567,7 +552,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
                 AutoReadDialog().show(supportFragmentManager, "autoRead")
             }
             else -> {
-                read_menu.runMenuIn()
+                binding.readMenu.runMenuIn()
             }
         }
     }
@@ -593,35 +578,44 @@ class ReadBookActivity : ReadBookBaseActivity(),
             autoPageStop()
         } else {
             isAutoPage = true
-            page_view.upContent()
+            binding.pageView.upContent()
-            page_view.upContent(1)
+            binding.pageView.upContent(1)
             autoPagePlus()
         }
-        read_menu.setAutoPage(isAutoPage)
+        binding.readMenu.setAutoPage(isAutoPage)
     }
 
     override fun autoPageStop() {
         isAutoPage = false
         mHandler.removeCallbacks(autoPageRunnable)
-        page_view.upContent()
+        binding.pageView.upContent()
     }
 
     private fun autoPagePlus() {
         mHandler.removeCallbacks(autoPageRunnable)
-        if (page_view.isScroll) {
+        if (binding.pageView.isScroll) {
-            page_view.curPage.scroll(-page_view.height / ReadBookConfig.autoReadSpeed / 50)
+            binding.pageView.curPage.scroll(-binding.pageView.height / ReadBookConfig.autoReadSpeed / 50)
         } else {
             autoPageProgress++
             if (autoPageProgress >= ReadBookConfig.autoReadSpeed * 50) {
                 autoPageProgress = 0
-                page_view.fillPage(PageDirection.NEXT)
+                binding.pageView.fillPage(PageDirection.NEXT)
             } else {
-                page_view.invalidate()
+                binding.pageView.invalidate()
             }
         }
         mHandler.postDelayed(autoPageRunnable, 20)
     }
 
+    override fun openSourceEditActivity() {
+        ReadBook.webBook?.let {
+            startActivityForResult<BookSourceEditActivity>(
+                requestCodeEditSource,
+                Pair("data", it.bookSource.bookSourceUrl)
+            )
+        }
+    }
+
     /**
      * 替换
      */
@@ -672,7 +666,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
      * 更新状态栏,导航栏
      */
     override fun upSystemUiVisibility() {
-        upSystemUiVisibility(isInMultiWindow, !read_menu.isVisible)
+        upSystemUiVisibility(isInMultiWindow, !binding.readMenu.isVisible)
         upNavigationBarColor()
     }
 
@@ -726,6 +720,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
         super.onActivityResult(requestCode, resultCode, data)
         if (resultCode == Activity.RESULT_OK) {
             when (requestCode) {
+                requestCodeEditSource -> viewModel.upBookSource()
                 requestCodeChapterList ->
                     data?.getIntExtra("index", ReadBook.durChapterIndex)?.let { index ->
                         if (index != ReadBook.durChapterIndex) {
@@ -756,27 +751,28 @@ class ReadBookActivity : ReadBookBaseActivity(),
                                 ReadBook.skipToPage(positions[0])
                             }
                             withContext(Main) {
-                                page_view.curPage.selectStartMoveIndex(
+                                binding.pageView.curPage.selectStartMoveIndex(
                                     0,
                                     positions[1],
                                     positions[2]
                                 )
                                 delay(20L)
                                 when (positions[3]) {
-                                    0 -> page_view.curPage.selectEndMoveIndex(
+                                    0 -> binding.pageView.curPage.selectEndMoveIndex(
                                         0,
                                         positions[1],
                                         positions[2] + viewModel.searchContentQuery.length - 1
                                     )
-                                    1 -> page_view.curPage.selectEndMoveIndex(
+                                    1 -> binding.pageView.curPage.selectEndMoveIndex(
                                         0,
                                         positions[1] + 1,
                                         positions[4]
                                     )
                                     //consider change page, jump to scroll position
-                                    -1 -> page_view.curPage.selectEndMoveIndex(1, 0, positions[4])
+                                    -1 -> binding.pageView.curPage
+                                        .selectEndMoveIndex(1, 0, positions[4])
                                 }
-                                page_view.isTextSelected = true
+                                binding.pageView.isTextSelected = true
                                 delay(100L)
                             }
                         }
@@ -807,7 +803,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
         super.onDestroy()
         mHandler.removeCallbacks(keepScreenRunnable)
         textActionMenu?.dismiss()
-        page_view.onDestroy()
+        binding.pageView.onDestroy()
         ReadBook.msg = null
         if (!BuildConfig.DEBUG) {
             SyncBookProgress.uploadBookProgress()
@@ -817,11 +813,11 @@ class ReadBookActivity : ReadBookBaseActivity(),
 
     override fun observeLiveBus() {
         super.observeLiveBus()
-        observeEvent<String>(EventBus.TIME_CHANGED) { page_view.upTime() }
+        observeEvent<String>(EventBus.TIME_CHANGED) { binding.pageView.upTime() }
-        observeEvent<Int>(EventBus.BATTERY_CHANGED) { page_view.upBattery(it) }
+        observeEvent<Int>(EventBus.BATTERY_CHANGED) { binding.pageView.upBattery(it) }
         observeEvent<BookChapter>(EventBus.OPEN_CHAPTER) {
             viewModel.openChapter(it.index, ReadBook.durPageIndex)
-            page_view.upContent()
+            binding.pageView.upContent()
         }
         observeEvent<Boolean>(EventBus.MEDIA_BUTTON) {
             if (it) {
@@ -832,13 +828,13 @@ class ReadBookActivity : ReadBookBaseActivity(),
         }
         observeEvent<Boolean>(EventBus.UP_CONFIG) {
             upSystemUiVisibility()
-            page_view.upBg()
+            binding.pageView.upBg()
-            page_view.upTipStyle()
+            binding.pageView.upTipStyle()
-            page_view.upStyle()
+            binding.pageView.upStyle()
             if (it) {
                 ReadBook.loadContent(resetPageOffset = false)
             } else {
-                page_view.upContent(resetPageOffset = false)
+                binding.pageView.upContent(resetPageOffset = false)
             }
         }
         observeEvent<Int>(EventBus.ALOUD_STATE) {
@@ -847,7 +843,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
                     val page = textChapter.page(ReadBook.durPageIndex)
                     if (page != null) {
                         page.removePageAloudSpan()
-                        page_view.upContent(resetPageOffset = false)
+                        binding.pageView.upContent(resetPageOffset = false)
                     }
                 }
             }
@@ -868,10 +864,10 @@ class ReadBookActivity : ReadBookBaseActivity(),
             upScreenTimeOut()
         }
         observeEvent<Boolean>(PreferKey.textSelectAble) {
-            page_view.curPage.upSelectAble(it)
+            binding.pageView.curPage.upSelectAble(it)
         }
         observeEvent<String>(PreferKey.showBrightnessView) {
-            read_menu.upBrightnessState()
+            binding.readMenu.upBrightnessState()
         }
         observeEvent<String>(EventBus.REPLACE_RULE_SAVE) {
             viewModel.replaceRuleChanged()

app/src/main/java/io/legado/app/ui/book/read/ReadBookBaseActivity.kt

@@ -1,11 +1,8 @@
 package io.legado.app.ui.book.read
 
 import android.annotation.SuppressLint
-import android.app.Activity
-import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.graphics.Color
-import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.view.*
@@ -16,6 +13,8 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.entities.Bookmark
+import io.legado.app.databinding.ActivityBookReadBinding
+import io.legado.app.databinding.DialogDownloadChoiceBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.LocalConfig
 import io.legado.app.help.ReadBookConfig
@@ -31,27 +30,19 @@ import io.legado.app.service.help.ReadBook
 import io.legado.app.ui.book.read.config.BgTextConfigDialog
 import io.legado.app.ui.book.read.config.ClickActionConfigDialog
 import io.legado.app.ui.book.read.config.PaddingConfigDialog
-import io.legado.app.ui.book.source.edit.BookSourceEditActivity
 import io.legado.app.ui.widget.text.AutoCompleteTextView
 import io.legado.app.utils.getPrefString
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.requestInputMethod
-import kotlinx.android.synthetic.main.activity_book_read.*
-import kotlinx.android.synthetic.main.dialog_download_choice.view.*
-import kotlinx.android.synthetic.main.dialog_edit_text.view.*
-import kotlinx.android.synthetic.main.view_read_menu.*
-import org.jetbrains.anko.sdk27.listeners.onClick
-import org.jetbrains.anko.startActivityForResult
 
 /**
  * 阅读界面
  */
 abstract class ReadBookBaseActivity :
-    VMBaseActivity<ReadBookViewModel>(R.layout.activity_book_read) {
+    VMBaseActivity<ActivityBookReadBinding, ReadBookViewModel>() {
 
     override val viewModel: ReadBookViewModel
         get() = getViewModel(ReadBookViewModel::class.java)
-    private val requestCodeEditSource = 111
     var bottomDialog = 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -62,43 +53,11 @@ abstract class ReadBookBaseActivity :
     }
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        initView()
         if (LocalConfig.isFirstRead) {
             showClickRegionalConfig()
         }
     }
 
-    /**
-     * 初始化View
-     */
-    private fun initView() {
-        tv_chapter_name.onClick {
-            ReadBook.webBook?.let {
-                startActivityForResult<BookSourceEditActivity>(
-                    requestCodeEditSource,
-                    Pair("data", it.bookSource.bookSourceUrl)
-                )
-            }
-        }
-        tv_chapter_url.onClick {
-            runCatching {
-                val url = tv_chapter_url.text.toString()
-                val intent = Intent(Intent.ACTION_VIEW)
-                intent.data = Uri.parse(url)
-                startActivity(intent)
-            }
-        }
-    }
-
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        super.onActivityResult(requestCode, resultCode, data)
-        if (resultCode == Activity.RESULT_OK) {
-            when (requestCode) {
-                requestCodeEditSource -> viewModel.upBookSource()
-            }
-        }
-    }
-
     fun showPaddingConfig() {
         PaddingConfigDialog().show(supportFragmentManager, "paddingConfig")
     }
@@ -182,8 +141,7 @@ abstract class ReadBookBaseActivity :
 
     override fun upNavigationBarColor() {
         when {
-            read_menu == null -> return
+            binding.readMenu.isVisible -> ATH.setNavigationBarColorAuto(this)
-            read_menu.isVisible -> ATH.setNavigationBarColorAuto(this)
             bottomDialog > 0 -> ATH.setNavigationBarColorAuto(this, bottomBackground)
             else -> {
                 ATH.setNavigationBarColorAuto(this, Color.TRANSPARENT)
@@ -218,23 +176,22 @@ abstract class ReadBookBaseActivity :
     fun showDownloadDialog() {
         ReadBook.book?.let { book ->
             alert(titleResource = R.string.offline_cache) {
-                var view: View? = null
+                var dialogBinding: DialogDownloadChoiceBinding? = null
                 customView {
                     LayoutInflater.from(this@ReadBookBaseActivity)
                         .inflate(R.layout.dialog_download_choice, null)
                         .apply {
-                            view = this
+                            dialogBinding = DialogDownloadChoiceBinding.bind(this)
                             setBackgroundColor(context.backgroundColor)
-                            edit_start.setText((book.durChapterIndex + 1).toString())
+                            dialogBinding!!.editStart.setText((book.durChapterIndex + 1).toString())
-                            edit_end.setText(book.totalChapterNum.toString())
+                            dialogBinding!!.editEnd.setText(book.totalChapterNum.toString())
                         }
                 }
                 yesButton {
-                    view?.apply {
+                    val start = dialogBinding!!.editStart.text?.toString()?.toInt() ?: 0
-                        val start = edit_start?.text?.toString()?.toInt() ?: 0
+                    val end =
-                        val end = edit_end?.text?.toString()?.toInt() ?: book.totalChapterNum
+                        dialogBinding!!.editEnd.text?.toString()?.toInt() ?: book.totalChapterNum
-                        CacheBook.start(context, book.bookUrl, start - 1, end - 1)
+                    CacheBook.start(this@ReadBookBaseActivity, book.bookUrl, start - 1, end - 1)
-                    }
                 }
                 noButton()
             }.show()
@@ -250,9 +207,8 @@ abstract class ReadBookBaseActivity :
             message = book.name + " • " + textChapter.title
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view.apply {
+                    editText = findViewById(R.id.edit_view)
-                        setHint(R.string.note_content)
+                    editText!!.setHint(R.string.note_content)
-                    }
                 }
             }
             yesButton {
@@ -282,9 +238,9 @@ abstract class ReadBookBaseActivity :
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setFilterValues(charsets)
+                    editText?.setFilterValues(charsets)
-                    edit_view.setText(ReadBook.book?.charset)
+                    editText?.setText(ReadBook.book?.charset)
                 }
             }
             okButton {

app/src/main/java/io/legado/app/ui/book/read/ReadMenu.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.res.ColorStateList
 import android.graphics.drawable.GradientDrawable
 import android.util.AttributeSet
+import android.view.LayoutInflater
 import android.view.WindowManager
 import android.view.animation.Animation
 import android.widget.FrameLayout
@@ -12,12 +13,12 @@ import androidx.core.view.isVisible
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.PreferKey
+import io.legado.app.databinding.ViewReadMenuBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.LocalConfig
 import io.legado.app.lib.theme.*
 import io.legado.app.service.help.ReadBook
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.view_read_menu.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.sdk27.listeners.onLongClick
 
@@ -30,6 +31,7 @@ class ReadMenu @JvmOverloads constructor(
 ) : FrameLayout(context, attrs) {
     var cnaShowMenu: Boolean = false
     private val callBack: CallBack get() = activity as CallBack
+    private val binding = ViewReadMenuBinding.inflate(LayoutInflater.from(context), this, true)
     private lateinit var menuTopIn: Animation
     private lateinit var menuTopOut: Animation
     private lateinit var menuBottomIn: Animation
@@ -44,50 +46,49 @@ class ReadMenu @JvmOverloads constructor(
     val showBrightnessView get() = context.getPrefBoolean(PreferKey.showBrightnessView, true)
 
     init {
-        inflate(context, R.layout.view_read_menu, this)
         if (AppConfig.isNightTheme) {
-            fabNightTheme.setImageResource(R.drawable.ic_daytime)
+            binding.fabNightTheme.setImageResource(R.drawable.ic_daytime)
         } else {
-            fabNightTheme.setImageResource(R.drawable.ic_brightness)
+            binding.fabNightTheme.setImageResource(R.drawable.ic_brightness)
         }
         initAnimation()
         val brightnessBackground = GradientDrawable()
         brightnessBackground.cornerRadius = 5F.dp
         brightnessBackground.setColor(ColorUtils.adjustAlpha(bgColor, 0.5f))
-        ll_brightness.background = brightnessBackground
+        binding.llBrightness.background = brightnessBackground
-        ll_bottom_bg.setBackgroundColor(bgColor)
+        binding.llBottomBg.setBackgroundColor(bgColor)
-        fabSearch.backgroundTintList = bottomBackgroundList
+        binding.fabSearch.backgroundTintList = bottomBackgroundList
-        fabSearch.setColorFilter(textColor)
+        binding.fabSearch.setColorFilter(textColor)
-        fabAutoPage.backgroundTintList = bottomBackgroundList
+        binding.fabAutoPage.backgroundTintList = bottomBackgroundList
-        fabAutoPage.setColorFilter(textColor)
+        binding.fabAutoPage.setColorFilter(textColor)
-        fabReplaceRule.backgroundTintList = bottomBackgroundList
+        binding.fabReplaceRule.backgroundTintList = bottomBackgroundList
-        fabReplaceRule.setColorFilter(textColor)
+        binding.fabReplaceRule.setColorFilter(textColor)
-        fabNightTheme.backgroundTintList = bottomBackgroundList
+        binding.fabNightTheme.backgroundTintList = bottomBackgroundList
-        fabNightTheme.setColorFilter(textColor)
+        binding.fabNightTheme.setColorFilter(textColor)
-        tv_pre.setTextColor(textColor)
+        binding.tvPre.setTextColor(textColor)
-        tv_next.setTextColor(textColor)
+        binding.tvNext.setTextColor(textColor)
-        iv_catalog.setColorFilter(textColor)
+        binding.ivCatalog.setColorFilter(textColor)
-        tv_catalog.setTextColor(textColor)
+        binding.tvCatalog.setTextColor(textColor)
-        iv_read_aloud.setColorFilter(textColor)
+        binding.ivReadAloud.setColorFilter(textColor)
-        tv_read_aloud.setTextColor(textColor)
+        binding.tvReadAloud.setTextColor(textColor)
-        iv_font.setColorFilter(textColor)
+        binding.ivFont.setColorFilter(textColor)
-        tv_font.setTextColor(textColor)
+        binding.tvFont.setTextColor(textColor)
-        iv_setting.setColorFilter(textColor)
+        binding.ivSetting.setColorFilter(textColor)
-        tv_setting.setTextColor(textColor)
+        binding.tvSetting.setTextColor(textColor)
-        vw_bg.onClick { }
+        binding.vwBg.onClick { }
-        vwNavigationBar.onClick { }
+        binding.vwNavigationBar.onClick { }
-        seek_brightness.progress = context.getPrefInt("brightness", 100)
+        binding.seekBrightness.progress = context.getPrefInt("brightness", 100)
         upBrightnessState()
         bindEvent()
     }
 
     fun upBrightnessState() {
         if (brightnessAuto()) {
-            iv_brightness_auto.setColorFilter(context.accentColor)
+            binding.ivBrightnessAuto.setColorFilter(context.accentColor)
-            seek_brightness.isEnabled = false
+            binding.seekBrightness.isEnabled = false
         } else {
-            iv_brightness_auto.setColorFilter(context.buttonDisabledColor)
+            binding.ivBrightnessAuto.setColorFilter(context.buttonDisabledColor)
-            seek_brightness.isEnabled = true
+            binding.seekBrightness.isEnabled = true
         }
         setScreenBrightness(context.getPrefInt("brightness", 100))
     }
@@ -109,17 +110,17 @@ class ReadMenu @JvmOverloads constructor(
 
     fun runMenuIn() {
         this.visible()
-        title_bar.visible()
+        binding.titleBar.visible()
-        bottom_menu.visible()
+        binding.bottomMenu.visible()
-        title_bar.startAnimation(menuTopIn)
+        binding.titleBar.startAnimation(menuTopIn)
-        bottom_menu.startAnimation(menuBottomIn)
+        binding.bottomMenu.startAnimation(menuBottomIn)
     }
 
     fun runMenuOut(onMenuOutEnd: (() -> Unit)? = null) {
         this.onMenuOutEnd = onMenuOutEnd
         if (this.isVisible) {
-            title_bar.startAnimation(menuTopOut)
+            binding.titleBar.startAnimation(menuTopOut)
-            bottom_menu.startAnimation(menuBottomOut)
+            binding.bottomMenu.startAnimation(menuBottomOut)
         }
     }
 
@@ -128,28 +129,34 @@ class ReadMenu @JvmOverloads constructor(
     }
 
     private fun bindEvent() {
-        iv_brightness_auto.onClick {
+        binding.tvChapterName.onClick {
+            callBack.openSourceEditActivity()
+        }
+        binding.tvChapterUrl.onClick {
+            context.openUrl(binding.tvChapterUrl.text.toString())
+        }
+        binding.ivBrightnessAuto.onClick {
             context.putPrefBoolean("brightnessAuto", !brightnessAuto())
             upBrightnessState()
         }
         //亮度调节
-        seek_brightness.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+        binding.seekBrightness.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
-            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
+            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
                 setScreenBrightness(progress)
             }
 
-            override fun onStartTrackingTouch(seekBar: SeekBar?) {
+            override fun onStartTrackingTouch(seekBar: SeekBar) {
 
             }
 
-            override fun onStopTrackingTouch(seekBar: SeekBar?) {
+            override fun onStopTrackingTouch(seekBar: SeekBar) {
-                context.putPrefInt("brightness", seek_brightness.progress)
+                context.putPrefInt("brightness", seekBar.progress)
             }
 
         })
 
         //阅读进度
-        seek_read_page.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+        binding.seekBrightness.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
             override fun onProgressChanged(seekBar: SeekBar, i: Int, b: Boolean) {
 
             }
@@ -164,60 +171,60 @@ class ReadMenu @JvmOverloads constructor(
         })
 
         //搜索
-        fabSearch.onClick {
+        binding.fabSearch.onClick {
             runMenuOut {
                 callBack.openSearchActivity(null)
             }
         }
 
         //自动翻页
-        fabAutoPage.onClick {
+        binding.fabAutoPage.onClick {
             runMenuOut {
                 callBack.autoPage()
             }
         }
 
         //替换
-        fabReplaceRule.onClick { callBack.openReplaceRule() }
+        binding.fabReplaceRule.onClick { callBack.openReplaceRule() }
 
         //夜间模式
-        fabNightTheme.onClick {
+        binding.fabNightTheme.onClick {
             AppConfig.isNightTheme = !AppConfig.isNightTheme
             App.INSTANCE.applyDayNight()
         }
 
         //上一章
-        tv_pre.onClick { ReadBook.moveToPrevChapter(upContent = true, toLast = false) }
+        binding.tvPre.onClick { ReadBook.moveToPrevChapter(upContent = true, toLast = false) }
 
         //下一章
-        tv_next.onClick { ReadBook.moveToNextChapter(true) }
+        binding.tvNext.onClick { ReadBook.moveToNextChapter(true) }
 
         //目录
-        ll_catalog.onClick {
+        binding.llCatalog.onClick {
             runMenuOut {
                 callBack.openChapterList()
             }
         }
 
         //朗读
-        ll_read_aloud.onClick {
+        binding.llReadAloud.onClick {
             runMenuOut {
                 callBack.onClickReadAloud()
             }
         }
-        ll_read_aloud.onLongClick {
+        binding.llReadAloud.onLongClick {
             runMenuOut { callBack.showReadAloudDialog() }
             true
         }
         //界面
-        ll_font.onClick {
+        binding.llFont.onClick {
             runMenuOut {
                 callBack.showReadStyle()
             }
         }
 
         //设置
-        ll_setting.onClick {
+        binding.llSetting.onClick {
             runMenuOut {
                 callBack.showMoreSetting()
             }
@@ -231,12 +238,12 @@ class ReadMenu @JvmOverloads constructor(
         menuTopIn.setAnimationListener(object : Animation.AnimationListener {
             override fun onAnimationStart(animation: Animation) {
                 callBack.upSystemUiVisibility()
-                ll_brightness.visible(showBrightnessView)
+                binding.llBrightness.visible(showBrightnessView)
             }
 
             override fun onAnimationEnd(animation: Animation) {
-                vw_menu_bg.onClick { runMenuOut() }
+                binding.vwMenuBg.onClick { runMenuOut() }
-                vwNavigationBar.layoutParams = vwNavigationBar.layoutParams.apply {
+                binding.vwNavigationBar.layoutParams = binding.vwNavigationBar.layoutParams.apply {
                     height = activity!!.navigationBarHeight
                 }
                 if (LocalConfig.isFirstReadMenuShow) {
@@ -253,13 +260,13 @@ class ReadMenu @JvmOverloads constructor(
             AnimationUtilsSupport.loadAnimation(context, R.anim.anim_readbook_bottom_out)
         menuTopOut.setAnimationListener(object : Animation.AnimationListener {
             override fun onAnimationStart(animation: Animation) {
-                vw_menu_bg.setOnClickListener(null)
+                binding.vwMenuBg.setOnClickListener(null)
             }
 
             override fun onAnimationEnd(animation: Animation) {
                 this@ReadMenu.invisible()
-                title_bar.invisible()
+                binding.titleBar.invisible()
-                bottom_menu.invisible()
+                binding.bottomMenu.invisible()
                 cnaShowMenu = false
                 onMenuOutEnd?.invoke()
                 callBack.upSystemUiVisibility()
@@ -269,15 +276,43 @@ class ReadMenu @JvmOverloads constructor(
         })
     }
 
+    fun setTitle(title: String) {
+        binding.titleBar.title = title
+    }
+
+    fun upBookView() {
+        ReadBook.curTextChapter?.let {
+            binding.tvChapterName.text = it.title
+            binding.tvChapterName.visible()
+            if (!ReadBook.isLocalBook) {
+                binding.tvChapterUrl.text = it.url
+                binding.tvChapterUrl.visible()
+            } else {
+                binding.tvChapterUrl.gone()
+            }
+            binding.seekReadPage.max = it.pageSize.minus(1)
+            binding.seekReadPage.progress = ReadBook.durPageIndex
+            binding.tvPre.isEnabled = ReadBook.durChapterIndex != 0
+            binding.tvNext.isEnabled = ReadBook.durChapterIndex != ReadBook.chapterSize - 1
+        } ?: let {
+            binding.tvChapterName.gone()
+            binding.tvChapterUrl.gone()
+        }
+    }
+
+    fun setSeekPage(seek: Int) {
+        binding.seekReadPage.progress = seek
+    }
+
     fun setAutoPage(autoPage: Boolean) {
         if (autoPage) {
-            fabAutoPage.setImageResource(R.drawable.ic_auto_page_stop)
+            binding.fabAutoPage.setImageResource(R.drawable.ic_auto_page_stop)
-            fabAutoPage.contentDescription = context.getString(R.string.auto_next_page_stop)
+            binding.fabAutoPage.contentDescription = context.getString(R.string.auto_next_page_stop)
         } else {
-            fabAutoPage.setImageResource(R.drawable.ic_auto_page)
+            binding.fabAutoPage.setImageResource(R.drawable.ic_auto_page)
-            fabAutoPage.contentDescription = context.getString(R.string.auto_next_page)
+            binding.fabAutoPage.contentDescription = context.getString(R.string.auto_next_page)
         }
-        fabAutoPage.setColorFilter(textColor)
+        binding.fabAutoPage.setColorFilter(textColor)
     }
 
     interface CallBack {
@@ -285,6 +320,7 @@ class ReadMenu @JvmOverloads constructor(
         fun openReplaceRule()
         fun openChapterList()
         fun openSearchActivity(searchWord: String?)
+        fun openSourceEditActivity()
         fun showReadStyle()
         fun showMoreSetting()
         fun showReadAloudDialog()

app/src/main/java/io/legado/app/ui/book/read/page/ContentView.kt

@@ -3,6 +3,7 @@ package io.legado.app.ui.book.read.page
 import android.annotation.SuppressLint
 import android.content.Context
 import android.graphics.drawable.Drawable
+import android.view.LayoutInflater
 import android.widget.FrameLayout
 import androidx.core.view.isGone
 import androidx.core.view.isInvisible
@@ -10,6 +11,7 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
 import io.legado.app.constant.AppConst.timeFormat
+import io.legado.app.databinding.ViewBookPageBinding
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.help.ReadTipConfig
 import io.legado.app.service.help.ReadBook
@@ -18,13 +20,14 @@ import io.legado.app.ui.book.read.page.entities.TextPage
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import io.legado.app.ui.widget.BatteryView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.view_book_page.view.*
 import org.jetbrains.anko.topPadding
 import java.util.*
 
-
+/**
+ * 阅读界面
+ */
 class ContentView(context: Context) : FrameLayout(context) {
-
+    private val binding = ViewBookPageBinding.inflate(LayoutInflater.from(context), this, true)
     private var battery = 100
     private var tvTitle: BatteryView? = null
     private var tvTime: BatteryView? = null
@@ -38,7 +41,7 @@ class ContentView(context: Context) : FrameLayout(context) {
     val headerHeight: Int
         get() {
             val h1 = if (ReadBookConfig.hideStatusBar) 0 else context.statusBarHeight
-            val h2 = if (ll_header.isGone) 0 else ll_header.height
+            val h2 = if (binding.llHeader.isGone) 0 else binding.llHeader.height
             return h1 + h2
         }
 
@@ -46,52 +49,51 @@ class ContentView(context: Context) : FrameLayout(context) {
         if (!isInEditMode) {
             //设置背景防止切换背景时文字重叠
             setBackgroundColor(context.getCompatColor(R.color.background))
-            inflate(context, R.layout.view_book_page, this)
             upTipStyle()
             upStyle()
-            content_text_view.upView = {
+            binding.contentTextView.upView = {
                 setProgress(it)
             }
         }
     }
 
     fun upStyle() = ReadBookConfig.apply {
-        bv_header_left.typeface = ChapterProvider.typeface
+        binding.bvHeaderLeft.typeface = ChapterProvider.typeface
-        tv_header_left.typeface = ChapterProvider.typeface
+        binding.tvHeaderLeft.typeface = ChapterProvider.typeface
-        tv_header_middle.typeface = ChapterProvider.typeface
+        binding.tvHeaderMiddle.typeface = ChapterProvider.typeface
-        tv_header_right.typeface = ChapterProvider.typeface
+        binding.tvHeaderRight.typeface = ChapterProvider.typeface
-        bv_footer_left.typeface = ChapterProvider.typeface
+        binding.bvFooterLeft.typeface = ChapterProvider.typeface
-        tv_footer_left.typeface = ChapterProvider.typeface
+        binding.tvFooterLeft.typeface = ChapterProvider.typeface
-        tv_footer_middle.typeface = ChapterProvider.typeface
+        binding.tvFooterMiddle.typeface = ChapterProvider.typeface
-        tv_footer_right.typeface = ChapterProvider.typeface
+        binding.tvFooterRight.typeface = ChapterProvider.typeface
         val tipColor = if (ReadTipConfig.tipColor == 0) textColor else ReadTipConfig.tipColor
-        bv_header_left.setColor(tipColor)
+        binding.bvHeaderLeft.setColor(tipColor)
-        tv_header_left.setColor(tipColor)
+        binding.tvHeaderLeft.setColor(tipColor)
-        tv_header_middle.setColor(tipColor)
+        binding.tvHeaderMiddle.setColor(tipColor)
-        tv_header_right.setColor(tipColor)
+        binding.tvHeaderRight.setColor(tipColor)
-        bv_footer_left.setColor(tipColor)
+        binding.bvFooterLeft.setColor(tipColor)
-        tv_footer_left.setColor(tipColor)
+        binding.tvFooterLeft.setColor(tipColor)
-        tv_footer_middle.setColor(tipColor)
+        binding.tvFooterMiddle.setColor(tipColor)
-        tv_footer_right.setColor(tipColor)
+        binding.tvFooterRight.setColor(tipColor)
         upStatusBar()
-        ll_header.setPadding(
+        binding.llHeader.setPadding(
             headerPaddingLeft.dp,
             headerPaddingTop.dp,
             headerPaddingRight.dp,
             headerPaddingBottom.dp
         )
-        ll_footer.setPadding(
+        binding.llFooter.setPadding(
             footerPaddingLeft.dp,
             footerPaddingTop.dp,
             footerPaddingRight.dp,
             footerPaddingBottom.dp
         )
-        vw_top_divider.visible(showHeaderLine)
+        binding.vwTopDivider.visible(showHeaderLine)
-        vw_bottom_divider.visible(showFooterLine)
+        binding.vwBottomDivider.visible(showFooterLine)
-        page_nv_bar.layoutParams = page_nv_bar.layoutParams.apply {
+        binding.pageNvBar.layoutParams = binding.pageNvBar.layoutParams.apply {
             height = if (hideNavigationBar) 0 else App.navigationBarHeight
         }
-        content_text_view.upVisibleRect()
+        binding.contentTextView.upVisibleRect()
         upTime()
         upBattery(battery)
     }
@@ -100,27 +102,29 @@ class ContentView(context: Context) : FrameLayout(context) {
      * 显示状态栏时隐藏header
      */
     fun upStatusBar() {
-        vw_status_bar.topPadding = context.statusBarHeight
+        binding.vwStatusBar.topPadding = context.statusBarHeight
-        vw_status_bar.isGone =
+        binding.vwStatusBar.isGone =
-            ReadBookConfig.hideStatusBar || (activity as? BaseActivity)?.isInMultiWindow == true
+            ReadBookConfig.hideStatusBar || (activity as? BaseActivity<*>)?.isInMultiWindow == true
     }
 
     fun upTipStyle() {
         ReadTipConfig.apply {
-            tv_header_left.isInvisible = tipHeaderLeft != chapterTitle
+            binding.tvHeaderLeft.isInvisible = tipHeaderLeft != chapterTitle
-            bv_header_left.isInvisible = tipHeaderLeft == none || !tv_header_left.isInvisible
+            binding.bvHeaderLeft.isInvisible =
-            tv_header_right.isGone = tipHeaderRight == none
+                tipHeaderLeft == none || !binding.bvHeaderLeft.isInvisible
-            tv_header_middle.isGone = tipHeaderMiddle == none
+            binding.tvHeaderRight.isGone = tipHeaderRight == none
-            tv_footer_left.isInvisible = tipFooterLeft != chapterTitle
+            binding.tvHeaderMiddle.isGone = tipHeaderMiddle == none
-            bv_footer_left.isInvisible = tipFooterLeft == none || !tv_footer_left.isInvisible
+            binding.tvFooterLeft.isInvisible = tipFooterLeft != chapterTitle
-            tv_footer_right.isGone = tipFooterRight == none
+            binding.bvFooterLeft.isInvisible =
-            tv_footer_middle.isGone = tipFooterMiddle == none
+                tipFooterLeft == none || !binding.tvFooterLeft.isInvisible
-            ll_header.isGone = when (headerMode) {
+            binding.tvFooterRight.isGone = tipFooterRight == none
+            binding.tvFooterMiddle.isGone = tipFooterMiddle == none
+            binding.llHeader.isGone = when (headerMode) {
                 1 -> false
                 2 -> true
                 else -> !ReadBookConfig.hideStatusBar
             }
-            ll_footer.isGone = when (footerMode) {
+            binding.llFooter.isGone = when (footerMode) {
                 1 -> true
                 else -> false
             }
@@ -170,19 +174,19 @@ class ContentView(context: Context) : FrameLayout(context) {
     private fun getTipView(tip: Int): BatteryView? {
         return when (tip) {
             ReadTipConfig.tipHeaderLeft ->
-                if (tip == ReadTipConfig.chapterTitle) tv_header_left else bv_header_left
+                if (tip == ReadTipConfig.chapterTitle) binding.tvHeaderLeft else binding.bvHeaderLeft
-            ReadTipConfig.tipHeaderMiddle -> tv_header_middle
+            ReadTipConfig.tipHeaderMiddle -> binding.tvHeaderMiddle
-            ReadTipConfig.tipHeaderRight -> tv_header_right
+            ReadTipConfig.tipHeaderRight -> binding.tvHeaderRight
             ReadTipConfig.tipFooterLeft ->
-                if (tip == ReadTipConfig.chapterTitle) tv_footer_left else bv_footer_left
+                if (tip == ReadTipConfig.chapterTitle) binding.tvFooterLeft else binding.bvFooterLeft
-            ReadTipConfig.tipFooterMiddle -> tv_footer_middle
+            ReadTipConfig.tipFooterMiddle -> binding.tvFooterMiddle
-            ReadTipConfig.tipFooterRight -> tv_footer_right
+            ReadTipConfig.tipFooterRight -> binding.tvFooterRight
             else -> null
         }
     }
 
     fun setBg(bg: Drawable?) {
-        page_panel.background = bg
+        binding.pagePanel.background = bg
     }
 
     fun upTime() {
@@ -209,15 +213,15 @@ class ContentView(context: Context) : FrameLayout(context) {
         if (resetPageOffset) {
             resetPageOffset()
         }
-        content_text_view.setContent(pageData)
+        binding.contentTextView.setContent(pageData)
     }
 
     fun setContentDescription(content: String) {
-        content_text_view.contentDescription = content
+        binding.contentTextView.contentDescription = content
     }
 
     fun resetPageOffset() {
-        content_text_view.resetPageOffset()
+        binding.contentTextView.resetPageOffset()
     }
 
     @SuppressLint("SetTextI18n")
@@ -230,40 +234,40 @@ class ContentView(context: Context) : FrameLayout(context) {
     }
 
     fun scroll(offset: Int) {
-        content_text_view.scroll(offset)
+        binding.contentTextView.scroll(offset)
     }
 
     fun upSelectAble(selectAble: Boolean) {
-        content_text_view.selectAble = selectAble
+        binding.contentTextView.selectAble = selectAble
     }
 
     fun selectText(
         x: Float, y: Float,
         select: (relativePage: Int, lineIndex: Int, charIndex: Int) -> Unit,
     ) {
-        return content_text_view.selectText(x, y - headerHeight, select)
+        return binding.contentTextView.selectText(x, y - headerHeight, select)
     }
 
     fun selectStartMove(x: Float, y: Float) {
-        content_text_view.selectStartMove(x, y - headerHeight)
+        binding.contentTextView.selectStartMove(x, y - headerHeight)
     }
 
     fun selectStartMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
-        content_text_view.selectStartMoveIndex(relativePage, lineIndex, charIndex)
+        binding.contentTextView.selectStartMoveIndex(relativePage, lineIndex, charIndex)
     }
 
     fun selectEndMove(x: Float, y: Float) {
-        content_text_view.selectEndMove(x, y - headerHeight)
+        binding.contentTextView.selectEndMove(x, y - headerHeight)
     }
 
     fun selectEndMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
-        content_text_view.selectEndMoveIndex(relativePage, lineIndex, charIndex)
+        binding.contentTextView.selectEndMoveIndex(relativePage, lineIndex, charIndex)
     }
 
     fun cancelSelect() {
-        content_text_view.cancelSelect()
+        binding.contentTextView.cancelSelect()
     }
 
-    val selectedText: String get() = content_text_view.selectedText
+    val selectedText: String get() = binding.contentTextView.selectedText
 
 }

app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt

@@ -20,7 +20,6 @@ import io.legado.app.ui.book.read.page.entities.TextChapter
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import io.legado.app.utils.activity
 import io.legado.app.utils.screenshot
-import kotlinx.android.synthetic.main.activity_book_read.view.*
 import kotlin.math.abs
 
 class PageView(context: Context, attrs: AttributeSet) :
@@ -123,13 +122,13 @@ class PageView(context: Context, attrs: AttributeSet) :
         if (!isInEditMode && callBack.isAutoPage && !isScroll) {
             nextPage.screenshot()?.let {
                 val bottom =
-                    page_view.height * callBack.autoPageProgress / (ReadBookConfig.autoReadSpeed * 50)
+                    height * callBack.autoPageProgress / (ReadBookConfig.autoReadSpeed * 50)
-                autoPageRect.set(0, 0, page_view.width, bottom)
+                autoPageRect.set(0, 0, width, bottom)
                 canvas.drawBitmap(it, autoPageRect, autoPageRect, null)
                 canvas.drawRect(
                     0f,
                     bottom.toFloat() - 1,
-                    page_view.width.toFloat(),
+                    width.toFloat(),
                     bottom.toFloat(),
                     autoPagePint
                 )

app/src/main/java/io/legado/app/ui/book/search/SearchActivity.kt

@@ -19,13 +19,12 @@ import io.legado.app.constant.PreferKey
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.SearchBook
 import io.legado.app.data.entities.SearchKeyword
+import io.legado.app.databinding.ActivityBookSearchBinding
 import io.legado.app.lib.theme.*
 import io.legado.app.ui.book.info.BookInfoActivity
 import io.legado.app.ui.book.source.manage.BookSourceActivity
 import io.legado.app.ui.widget.recycler.LoadMoreView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_search.*
-import kotlinx.android.synthetic.main.view_search.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -34,7 +33,7 @@ import org.jetbrains.anko.startActivity
 import java.text.Collator
 
 
-class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_search),
+class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel>(),
     BookAdapter.CallBack,
     HistoryKeyAdapter.CallBack,
     SearchAdapter.CallBack {
@@ -46,6 +45,7 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     private lateinit var bookAdapter: BookAdapter
     private lateinit var historyKeyAdapter: HistoryKeyAdapter
     private lateinit var loadMoreView: LoadMoreView
+    private lateinit var serchView: SearchView
     private var historyData: LiveData<List<SearchKeyword>>? = null
     private var bookData: LiveData<List<Book>>? = null
     private var menu: Menu? = null
@@ -53,7 +53,8 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     private var groups = linkedSetOf<String>()
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        ll_history.setBackgroundColor(backgroundColor)
+        binding.llHistory.setBackgroundColor(backgroundColor)
+        serchView = binding.titleBar.findViewById(R.id.search_view)
         initRecyclerView()
         initSearchView()
         initOtherView()
@@ -83,8 +84,8 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
                     !getPrefBoolean(PreferKey.precisionSearch)
                 )
                 precisionSearchMenuItem?.isChecked = getPrefBoolean(PreferKey.precisionSearch)
-                search_view.query?.toString()?.trim()?.let {
+                serchView.query?.toString()?.trim()?.let {
-                    search_view.setQuery(it, true)
+                    serchView.setQuery(it, true)
                 }
             }
             R.id.menu_source_manage -> startActivity<BookSourceActivity>()
@@ -95,8 +96,8 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
                 } else {
                     putPrefString("searchGroup", item.title.toString())
                 }
-                search_view.query?.toString()?.trim()?.let {
+                serchView.query?.toString()?.trim()?.let {
-                    search_view.setQuery(it, true)
+                    serchView.setQuery(it, true)
                 }
             }
         }
@@ -104,14 +105,14 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     }
 
     private fun initSearchView() {
-        ATH.setTint(search_view, primaryTextColor)
+        ATH.setTint(serchView, primaryTextColor)
-        search_view.onActionViewExpanded()
+        serchView.onActionViewExpanded()
-        search_view.isSubmitButtonEnabled = true
+        serchView.isSubmitButtonEnabled = true
-        search_view.queryHint = getString(R.string.search_book_key)
+        serchView.queryHint = getString(R.string.search_book_key)
-        search_view.clearFocus()
+        serchView.clearFocus()
-        search_view.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+        serchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String?): Boolean {
-                search_view.clearFocus()
+                serchView.clearFocus()
                 query?.let {
                     viewModel.saveSearchKey(query)
                     viewModel.search(it)
@@ -126,8 +127,8 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
                 return false
             }
         })
-        search_view.setOnQueryTextFocusChangeListener { _, hasFocus ->
+        serchView.setOnQueryTextFocusChangeListener { _, hasFocus ->
-            if (!hasFocus && search_view.query.toString().trim().isEmpty()) {
+            if (!hasFocus && serchView.query.toString().trim().isEmpty()) {
                 finish()
             } else {
                 openOrCloseHistory(hasFocus)
@@ -137,28 +138,28 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
-        ATH.applyEdgeEffectColor(rv_bookshelf_search)
+        ATH.applyEdgeEffectColor(binding.rvBookshelfSearch)
-        ATH.applyEdgeEffectColor(rv_history_key)
+        ATH.applyEdgeEffectColor(binding.rvHistoryKey)
         bookAdapter = BookAdapter(this, this)
-        rv_bookshelf_search.layoutManager = FlexboxLayoutManager(this)
+        binding.rvBookshelfSearch.layoutManager = FlexboxLayoutManager(this)
-        rv_bookshelf_search.adapter = bookAdapter
+        binding.rvBookshelfSearch.adapter = bookAdapter
         historyKeyAdapter = HistoryKeyAdapter(this, this)
-        rv_history_key.layoutManager = FlexboxLayoutManager(this)
+        binding.rvHistoryKey.layoutManager = FlexboxLayoutManager(this)
-        rv_history_key.adapter = historyKeyAdapter
+        binding.rvHistoryKey.adapter = historyKeyAdapter
         adapter = SearchAdapter(this, this)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
         adapter.registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
             override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
                 super.onItemRangeInserted(positionStart, itemCount)
                 if (positionStart == 0) {
-                    recycler_view.scrollToPosition(0)
+                    binding.recyclerView.scrollToPosition(0)
                 }
             }
         })
         loadMoreView = LoadMoreView(this)
-        recycler_view.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+        binding.recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
             override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                 super.onScrolled(recyclerView, dx, dy)
                 if (!recyclerView.canScrollVertically(1)) {
@@ -169,16 +170,16 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     }
 
     private fun initOtherView() {
-        fb_stop.backgroundTintList =
+        binding.fbStop.backgroundTintList =
             Selector.colorBuild()
                 .setDefaultColor(accentColor)
                 .setPressedColor(ColorUtils.darkenColor(accentColor))
                 .create()
-        fb_stop.onClick {
+        binding.fbStop.onClick {
             viewModel.stop()
-            refresh_progress_bar.isAutoLoading = false
+            binding.refreshProgressBar.isAutoLoading = false
         }
-        tv_clear_history.onClick { viewModel.clearHistory() }
+        binding.tvClearHistory.onClick { viewModel.clearHistory() }
     }
 
     private fun initLiveData() {
@@ -203,9 +204,9 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
 
     private fun receiptIntent(intent: Intent? = null) {
         intent?.getStringExtra("key")?.let {
-            search_view.setQuery(it, true)
+            serchView.setQuery(it, true)
         } ?: let {
-            search_view.requestFocus()
+            serchView.requestFocus()
         }
     }
 
@@ -223,10 +224,10 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
      */
     private fun openOrCloseHistory(open: Boolean) {
         if (open) {
-            upHistory(search_view.query.toString())
+            upHistory(serchView.query.toString())
-            ll_history.visibility = VISIBLE
+            binding.llHistory.visibility = VISIBLE
         } else {
-            ll_history.visibility = GONE
+            binding.llHistory.visibility = GONE
         }
     }
 
@@ -256,17 +257,17 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     private fun upHistory(key: String? = null) {
         bookData?.removeObservers(this)
         if (key.isNullOrBlank()) {
-            tv_book_show.gone()
+            binding.tvBookShow.gone()
-            rv_bookshelf_search.gone()
+            binding.rvBookshelfSearch.gone()
         } else {
             bookData = App.db.bookDao().liveDataSearch(key)
             bookData?.observe(this, {
                 if (it.isEmpty()) {
-                    tv_book_show.gone()
+                    binding.tvBookShow.gone()
-                    rv_bookshelf_search.gone()
+                    binding.rvBookshelfSearch.gone()
                 } else {
-                    tv_book_show.visible()
+                    binding.tvBookShow.visible()
-                    rv_bookshelf_search.visible()
+                    binding.rvBookshelfSearch.visible()
                 }
                 bookAdapter.setItems(it)
             })
@@ -281,9 +282,9 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
         historyData?.observe(this, {
             historyKeyAdapter.setItems(it)
             if (it.isEmpty()) {
-                tv_clear_history.invisible()
+                binding.tvClearHistory.invisible()
             } else {
-                tv_clear_history.visible()
+                binding.tvClearHistory.visible()
             }
         })
     }
@@ -300,17 +301,17 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
      * 开始搜索
      */
     private fun startSearch() {
-        refresh_progress_bar.isAutoLoading = true
+        binding.refreshProgressBar.isAutoLoading = true
-        fb_stop.visible()
+        binding.fbStop.visible()
     }
 
     /**
      * 搜索结束
      */
     private fun searchFinally() {
-        refresh_progress_bar.isAutoLoading = false
+        binding.refreshProgressBar.isAutoLoading = false
         loadMoreView.startLoad()
-        fb_stop.invisible()
+        binding.fbStop.invisible()
     }
 
     /**
@@ -343,14 +344,14 @@ class SearchActivity : VMBaseActivity<SearchViewModel>(R.layout.activity_book_se
     override fun searchHistory(key: String) {
         launch {
             when {
-                search_view.query.toString() == key -> {
+                serchView.query.toString() == key -> {
-                    search_view.setQuery(key, true)
+                    serchView.setQuery(key, true)
                 }
                 withContext(IO) { App.db.bookDao().findByName(key).isEmpty() } -> {
-                    search_view.setQuery(key, true)
+                    serchView.setQuery(key, true)
                 }
                 else -> {
-                    search_view.setQuery(key, false)
+                    serchView.setQuery(key, false)
                 }
             }
         }

app/src/main/java/io/legado/app/ui/book/searchContent/SearchContentActivity.kt

@@ -11,6 +11,7 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.EventBus
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
+import io.legado.app.databinding.ActivitySearchContentBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.BookHelp
 import io.legado.app.lib.theme.ATH
@@ -22,8 +23,6 @@ import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.ColorUtils
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.observeEvent
-import kotlinx.android.synthetic.main.activity_search_content.*
-import kotlinx.android.synthetic.main.view_search.*
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
@@ -31,24 +30,26 @@ import org.jetbrains.anko.sdk27.listeners.onClick
 
 
 class SearchContentActivity :
-    VMBaseActivity<SearchContentViewModel>(R.layout.activity_search_content),
+    VMBaseActivity<ActivitySearchContentBinding, SearchContentViewModel>(),
     SearchContentAdapter.Callback {
 
     override val viewModel: SearchContentViewModel
         get() = getViewModel(SearchContentViewModel::class.java)
     lateinit var adapter: SearchContentAdapter
     private lateinit var mLayoutManager: UpLinearLayoutManager
+    private lateinit var searchView: SearchView
     private var searchResultCounts = 0
     private var durChapterIndex = 0
     private var searchResultList: MutableList<SearchResult> = mutableListOf()
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
+        searchView = binding.titleBar.findViewById(R.id.search_view)
         val bbg = bottomBackground
         val btc = getPrimaryTextColor(ColorUtils.isColorLight(bbg))
-        ll_search_base_info.setBackgroundColor(bbg)
+        binding.llSearchBaseInfo.setBackgroundColor(bbg)
-        tv_current_search_info.setTextColor(btc)
+        binding.tvCurrentSearchInfo.setTextColor(btc)
-        iv_search_content_top.setColorFilter(btc)
+        binding.ivSearchContentTop.setColorFilter(btc)
-        iv_search_content_bottom.setColorFilter(btc)
+        binding.ivSearchContentBottom.setColorFilter(btc)
         initSearchView()
         initRecyclerView()
         initView()
@@ -60,12 +61,12 @@ class SearchContentActivity :
     }
 
     private fun initSearchView() {
-        ATH.setTint(search_view, primaryTextColor)
+        ATH.setTint(searchView, primaryTextColor)
-        search_view.onActionViewExpanded()
+        searchView.onActionViewExpanded()
-        search_view.isSubmitButtonEnabled = true
+        searchView.isSubmitButtonEnabled = true
-        search_view.queryHint = getString(R.string.search)
+        searchView.queryHint = getString(R.string.search)
-        search_view.clearFocus()
+        searchView.clearFocus()
-        search_view.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String): Boolean {
                 if (viewModel.lastQuery != query) {
                     startContentSearch(query)
@@ -82,14 +83,14 @@ class SearchContentActivity :
     private fun initRecyclerView() {
         adapter = SearchContentAdapter(this, this)
         mLayoutManager = UpLinearLayoutManager(this)
-        recycler_view.layoutManager = mLayoutManager
+        binding.recyclerView.layoutManager = mLayoutManager
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
     }
 
     private fun initView() {
-        iv_search_content_top.onClick { mLayoutManager.scrollToPositionWithOffset(0, 0) }
+        binding.ivSearchContentTop.onClick { mLayoutManager.scrollToPositionWithOffset(0, 0) }
-        iv_search_content_bottom.onClick {
+        binding.ivSearchContentBottom.onClick {
             if (adapter.itemCount > 0) {
                 mLayoutManager.scrollToPositionWithOffset(adapter.itemCount - 1, 0)
             }
@@ -98,12 +99,12 @@ class SearchContentActivity :
 
     @SuppressLint("SetTextI18n")
     private fun initBook() {
-        tv_current_search_info.text = "搜索结果：$searchResultCounts"
+        binding.tvCurrentSearchInfo.text = "搜索结果：$searchResultCounts"
         viewModel.book?.let {
             initCacheFileNames(it)
             durChapterIndex = it.durChapterIndex
             intent.getStringExtra("searchWord")?.let { searchWord ->
-                search_view.setQuery(searchWord, true)
+                searchView.setQuery(searchWord, true)
             }
         }
     }
@@ -131,10 +132,10 @@ class SearchContentActivity :
     @SuppressLint("SetTextI18n")
     fun startContentSearch(newText: String) {
         // 按章节搜索内容
-        if (!newText.isBlank()) {
+        if (newText.isNotBlank()) {
             adapter.clearItems()
             searchResultList.clear()
-            refresh_progress_bar.isAutoLoading = true
+            binding.refreshProgressBar.isAutoLoading = true
             searchResultCounts = 0
             viewModel.lastQuery = newText
             var searchResults = listOf<SearchResult>()
@@ -149,8 +150,8 @@ class SearchContentActivity :
                     }
                     if (searchResults.isNotEmpty()) {
                         searchResultList.addAll(searchResults)
-                        refresh_progress_bar.isAutoLoading = false
+                        binding.refreshProgressBar.isAutoLoading = false
-                        tv_current_search_info.text = "搜索结果：$searchResultCounts"
+                        binding.tvCurrentSearchInfo.text = "搜索结果：$searchResultCounts"
                         adapter.addItems(searchResults)
                         searchResults = listOf()
                     }

app/src/main/java/io/legado/app/ui/book/source/debug/BookSourceDebugActivity.kt

@@ -7,26 +7,26 @@ import android.view.MenuItem
 import androidx.appcompat.widget.SearchView
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivitySourceDebugBinding
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.qrcode.QrCodeActivity
 import io.legado.app.utils.getViewModel
-import kotlinx.android.synthetic.main.activity_source_debug.*
-import kotlinx.android.synthetic.main.view_search.*
 import kotlinx.coroutines.launch
 import org.jetbrains.anko.startActivityForResult
 import org.jetbrains.anko.toast
 
-class BookSourceDebugActivity :
+class BookSourceDebugActivity : VMBaseActivity<ActivitySourceDebugBinding, BookSourceDebugModel>() {
-    VMBaseActivity<BookSourceDebugModel>(R.layout.activity_source_debug) {
 
     override val viewModel: BookSourceDebugModel
         get() = getViewModel(BookSourceDebugModel::class.java)
 
     private lateinit var adapter: BookSourceDebugAdapter
+    private lateinit var searchView: SearchView
     private val qrRequestCode = 101
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
+        searchView = binding.titleBar.findViewById(R.id.search_view)
         viewModel.init(intent.getStringExtra("key"))
         initRecyclerView()
         initSearchView()
@@ -34,27 +34,27 @@ class BookSourceDebugActivity :
             launch {
                 adapter.addItem(msg)
                 if (state == -1 || state == 1000) {
-                    rotate_loading.hide()
+                    binding.rotateLoading.hide()
                 }
             }
         }
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
         adapter = BookSourceDebugAdapter(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        rotate_loading.loadingColor = accentColor
+        binding.rotateLoading.loadingColor = accentColor
     }
 
     private fun initSearchView() {
-        search_view.onActionViewExpanded()
+        searchView.onActionViewExpanded()
-        search_view.isSubmitButtonEnabled = true
+        searchView.isSubmitButtonEnabled = true
-        search_view.queryHint = getString(R.string.search_book_key)
+        searchView.queryHint = getString(R.string.search_book_key)
-        search_view.clearFocus()
+        searchView.clearFocus()
-        search_view.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String?): Boolean {
-                search_view.clearFocus()
+                searchView.clearFocus()
                 startSearch(query ?: "我的")
                 return true
             }
@@ -68,7 +68,7 @@ class BookSourceDebugActivity :
     private fun startSearch(key: String) {
         adapter.clearItems()
         viewModel.startDebug(key, {
-            rotate_loading.show()
+            binding.rotateLoading.show()
         }, {
             toast("未获取到书源")
         })

app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt

@@ -18,6 +18,7 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppConst
 import io.legado.app.data.entities.BookSource
 import io.legado.app.data.entities.rule.*
+import io.legado.app.databinding.ActivityBookSourceEditBinding
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.backgroundColor
@@ -29,12 +30,11 @@ import io.legado.app.ui.qrcode.QrCodeActivity
 import io.legado.app.ui.widget.KeyboardToolPop
 import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_source_edit.*
 import org.jetbrains.anko.*
 import kotlin.math.abs
 
 class BookSourceEditActivity :
-    VMBaseActivity<BookSourceEditViewModel>(R.layout.activity_book_source_edit, false),
+    VMBaseActivity<ActivityBookSourceEditBinding, BookSourceEditViewModel>(false),
     FilePickerDialog.CallBack,
     KeyboardToolPop.CallBack {
     override val viewModel: BookSourceEditViewModel
@@ -116,13 +116,13 @@ class BookSourceEditActivity :
     }
 
     private fun initView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
         mSoftKeyboardTool = KeyboardToolPop(this, AppConst.keyboardToolChars, this)
         window.decorView.viewTreeObserver.addOnGlobalLayoutListener(KeyboardOnGlobalChangeListener())
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        tab_layout.setBackgroundColor(backgroundColor)
+        binding.tabLayout.setBackgroundColor(backgroundColor)
-        tab_layout.addOnTabSelectedListener(object : TabLayout.OnTabSelectedListener {
+        binding.tabLayout.addOnTabSelectedListener(object : TabLayout.OnTabSelectedListener {
             override fun onTabReselected(tab: TabLayout.Tab?) {
 
             }
@@ -166,14 +166,14 @@ class BookSourceEditActivity :
             5 -> adapter.editEntities = contentEntities
             else -> adapter.editEntities = sourceEntities
         }
-        recycler_view.scrollToPosition(0)
+        binding.recyclerView.scrollToPosition(0)
     }
 
     private fun upRecyclerView(source: BookSource? = viewModel.bookSource) {
         source?.let {
-            cb_is_enable.isChecked = it.enabled
+            binding.cbIsEnable.isChecked = it.enabled
-            cb_is_enable_find.isChecked = it.enabledExplore
+            binding.cbIsEnableFind.isChecked = it.enabledExplore
-            sp_type.setSelection(it.bookSourceType)
+            binding.spType.setSelection(it.bookSourceType)
         }
         //基本信息
         sourceEntities.clear()
@@ -253,15 +253,15 @@ class BookSourceEditActivity :
             add(EditEntity("coverUrl", er?.coverUrl, R.string.rule_cover_url))
             add(EditEntity("bookUrl", er?.bookUrl, R.string.r_book_url))
         }
-        tab_layout.selectTab(tab_layout.getTabAt(0))
+        binding.tabLayout.selectTab(binding.tabLayout.getTabAt(0))
         setEditEntities(0)
     }
 
     private fun getSource(): BookSource {
         val source = viewModel.bookSource?.copy() ?: BookSource()
-        source.enabled = cb_is_enable.isChecked
+        source.enabled = binding.cbIsEnable.isChecked
-        source.enabledExplore = cb_is_enable_find.isChecked
+        source.enabledExplore = binding.cbIsEnableFind.isChecked
-        source.bookSourceType = sp_type.selectedItemPosition
+        source.bookSourceType = binding.spType.selectedItemPosition
         val searchRule = SearchRule()
         val exploreRule = ExploreRule()
         val bookInfoRule = BookInfoRule()
@@ -407,7 +407,7 @@ class BookSourceEditActivity :
         mSoftKeyboardTool?.let {
             if (it.isShowing) return
             if (!isFinishing) {
-                it.showAtLocation(ll_content, Gravity.BOTTOM, 0, 0)
+                it.showAtLocation(binding.root, Gravity.BOTTOM, 0, 0)
             }
         }
     }
@@ -448,11 +448,11 @@ class BookSourceEditActivity :
             val preShowing = mIsSoftKeyBoardShowing
             if (abs(keyboardHeight) > screenHeight / 5) {
                 mIsSoftKeyBoardShowing = true // 超过屏幕五分之一则表示弹出了输入法
-                recycler_view.setPadding(0, 0, 0, 100)
+                binding.recyclerView.setPadding(0, 0, 0, 100)
                 showKeyboardTopPopupWindow()
             } else {
                 mIsSoftKeyBoardShowing = false
-                recycler_view.setPadding(0, 0, 0, 0)
+                binding.recyclerView.setPadding(0, 0, 0, 0)
                 if (preShowing) {
                     closePopupWindow()
                 }

app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceActivity.kt

@@ -21,6 +21,7 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppPattern
 import io.legado.app.constant.EventBus
 import io.legado.app.data.entities.BookSource
+import io.legado.app.databinding.ActivityBookSourceBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.help.LocalConfig
 import io.legado.app.lib.dialogs.alert
@@ -39,16 +40,13 @@ import io.legado.app.ui.widget.recycler.ItemTouchCallback
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.ui.widget.text.AutoCompleteTextView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_book_source.*
-import kotlinx.android.synthetic.main.dialog_edit_text.view.*
-import kotlinx.android.synthetic.main.view_search.*
 import org.jetbrains.anko.startActivity
 import org.jetbrains.anko.startActivityForResult
 import org.jetbrains.anko.toast
 import java.io.File
 import java.text.Collator
 
-class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity_book_source),
+class BookSourceActivity : VMBaseActivity<ActivityBookSourceBinding, BookSourceViewModel>(),
     PopupMenu.OnMenuItemClickListener,
     BookSourceAdapter.CallBack,
     FilePickerDialog.CallBack,
@@ -61,6 +59,7 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
     private val importRequestCode = 132
     private val exportRequestCode = 65
     private lateinit var adapter: BookSourceAdapter
+    private lateinit var searchView: SearchView
     private var bookSourceLiveDate: LiveData<List<BookSource>>? = null
     private var groups = linkedSetOf<String>()
     private var groupMenu: SubMenu? = null
@@ -69,6 +68,7 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
     private var snackBar: Snackbar? = null
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
+        searchView = binding.titleBar.findViewById(R.id.search_view)
         initRecyclerView()
         initSearchView()
         initLiveDataBookSource()
@@ -105,65 +105,65 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             R.id.menu_sort_manual -> {
                 item.isChecked = true
                 sortCheck(0)
-                initLiveDataBookSource(search_view.query?.toString())
+                initLiveDataBookSource(searchView.query?.toString())
             }
             R.id.menu_sort_auto -> {
                 item.isChecked = true
                 sortCheck(1)
-                initLiveDataBookSource(search_view.query?.toString())
+                initLiveDataBookSource(searchView.query?.toString())
             }
             R.id.menu_sort_pin_yin -> {
                 item.isChecked = true
                 sortCheck(2)
-                initLiveDataBookSource(search_view.query?.toString())
+                initLiveDataBookSource(searchView.query?.toString())
             }
             R.id.menu_sort_url -> {
                 item.isChecked = true
                 sortCheck(3)
-                initLiveDataBookSource(search_view.query?.toString())
+                initLiveDataBookSource(searchView.query?.toString())
             }
             R.id.menu_sort_time -> {
                 item.isChecked = true
                 sortCheck(4)
-                initLiveDataBookSource(search_view.query?.toString())
+                initLiveDataBookSource(searchView.query?.toString())
             }
             R.id.menu_enabled_group -> {
-                search_view.setQuery(getString(R.string.enabled), true)
+                searchView.setQuery(getString(R.string.enabled), true)
             }
             R.id.menu_disabled_group -> {
-                search_view.setQuery(getString(R.string.disabled), true)
+                searchView.setQuery(getString(R.string.disabled), true)
             }
             R.id.menu_help -> showHelp()
         }
         if (item.groupId == R.id.source_group) {
-            search_view.setQuery(item.title, true)
+            searchView.setQuery(item.title, true)
         }
         return super.onCompatOptionsItemSelected(item)
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
         adapter = BookSourceAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
         val itemTouchCallback = ItemTouchCallback(adapter)
         itemTouchCallback.isCanDrag = true
         val dragSelectTouchHelper: DragSelectTouchHelper =
             DragSelectTouchHelper(adapter.initDragSelectTouchHelperCallback()).setSlideArea(16, 50)
-        dragSelectTouchHelper.attachToRecyclerView(recycler_view)
+        dragSelectTouchHelper.attachToRecyclerView(binding.recyclerView)
         // When this page is opened, it is in selection mode
         dragSelectTouchHelper.activeSlideSelect()
         // Note: need judge selection first, so add ItemTouchHelper after it.
-        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(recycler_view)
+        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(binding.recyclerView)
     }
 
     private fun initSearchView() {
-        ATH.setTint(search_view, primaryTextColor)
+        ATH.setTint(searchView, primaryTextColor)
-        search_view.onActionViewExpanded()
+        searchView.onActionViewExpanded()
-        search_view.queryHint = getString(R.string.search_book_source)
+        searchView.queryHint = getString(R.string.search_book_source)
-        search_view.clearFocus()
+        searchView.clearFocus()
-        search_view.setOnQueryTextListener(this)
+        searchView.setOnQueryTextListener(this)
     }
 
     private fun initLiveDataBookSource(searchKey: String? = null) {
@@ -250,10 +250,10 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
     }
 
     private fun initSelectActionBar() {
-        select_action_bar.setMainActionText(R.string.delete)
+        binding.selectActionBar.setMainActionText(R.string.delete)
-        select_action_bar.inflateMenu(R.menu.book_source_sel)
+        binding.selectActionBar.inflateMenu(R.menu.book_source_sel)
-        select_action_bar.setOnMenuItemClickListener(this)
+        binding.selectActionBar.setOnMenuItemClickListener(this)
-        select_action_bar.setCallBack(this)
+        binding.selectActionBar.setCallBack(this)
     }
 
     override fun onMenuItemClick(item: MenuItem?): Boolean {
@@ -278,8 +278,8 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setText(CheckSource.keyword)
+                    editText?.setText(CheckSource.keyword)
                 }
             }
             okButton {
@@ -300,10 +300,10 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setHint(R.string.group_name)
+                    editText?.setHint(R.string.group_name)
-                    edit_view.setFilterValues(groups.toList())
+                    editText?.setFilterValues(groups.toList())
-                    edit_view.dropDownHeight = 180.dp
+                    editText?.dropDownHeight = 180.dp
                 }
             }
             okButton {
@@ -323,10 +323,10 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setHint(R.string.group_name)
+                    editText?.setHint(R.string.group_name)
-                    edit_view.setFilterValues(groups.toList())
+                    editText?.setFilterValues(groups.toList())
-                    edit_view.dropDownHeight = 180.dp
+                    editText?.dropDownHeight = 180.dp
                 }
             }
             okButton {
@@ -359,9 +359,9 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setFilterValues(cacheUrls)
+                    editText?.setFilterValues(cacheUrls)
-                    edit_view.delCallBack = {
+                    editText?.delCallBack = {
                         cacheUrls.remove(it)
                         aCache.put(importRecordKey, cacheUrls.joinToString(","))
                     }
@@ -385,7 +385,7 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
         observeEvent<String>(EventBus.CHECK_SOURCE) { msg ->
             snackBar?.setText(msg) ?: let {
                 snackBar = Snackbar
-                    .make(root_view, msg, Snackbar.LENGTH_INDEFINITE)
+                    .make(binding.root, msg, Snackbar.LENGTH_INDEFINITE)
                     .setAction(R.string.cancel) {
                         CheckSource.stop(this)
                     }.apply { show() }
@@ -396,7 +396,7 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
             snackBar = null
             groups.map { group ->
                 if (group.contains("失效")) {
-                    search_view.setQuery("失效", true)
+                    searchView.setQuery("失效", true)
                     toast("发现有失效书源，已为您自动筛选！")
                 }
             }
@@ -404,7 +404,8 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
     }
 
     override fun upCountView() {
-        select_action_bar.upCountView(adapter.getSelection().size, adapter.getActualItemCount())
+        binding.selectActionBar
+            .upCountView(adapter.getSelection().size, adapter.getActualItemCount())
     }
 
     override fun onQueryTextChange(newText: String?): Boolean {
@@ -479,10 +480,10 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
     }
 
     override fun finish() {
-        if (search_view.query.isNullOrEmpty()) {
+        if (searchView.query.isNullOrEmpty()) {
             super.finish()
         } else {
-            search_view.setQuery("", true)
+            searchView.setQuery("", true)
         }
     }
 

app/src/main/java/io/legado/app/ui/book/toc/ChapterListActivity.kt

@@ -7,31 +7,33 @@ import androidx.core.view.isGone
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentPagerAdapter
+import com.google.android.material.tabs.TabLayout
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivityChapterListBinding
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.lib.theme.primaryTextColor
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.gone
 import io.legado.app.utils.visible
-import kotlinx.android.synthetic.main.activity_chapter_list.*
-import kotlinx.android.synthetic.main.view_tab_layout.*
 
 
-class ChapterListActivity : VMBaseActivity<ChapterListViewModel>(R.layout.activity_chapter_list) {
+class ChapterListActivity : VMBaseActivity<ActivityChapterListBinding, ChapterListViewModel>() {
     override val viewModel: ChapterListViewModel
         get() = getViewModel(ChapterListViewModel::class.java)
 
+    private lateinit var tabLayout: TabLayout
     private var searchView: SearchView? = null
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        tab_layout.isTabIndicatorFullWidth = false
+        tabLayout = binding.titleBar.findViewById(R.id.tab_layout)
-        tab_layout.setSelectedTabIndicatorColor(accentColor)
+        tabLayout.isTabIndicatorFullWidth = false
+        tabLayout.setSelectedTabIndicatorColor(accentColor)
         intent.getStringExtra("bookUrl")?.let {
             viewModel.initBook(it) {
-                view_pager.adapter = TabFragmentPageAdapter(supportFragmentManager)
+                binding.viewPager.adapter = TabFragmentPageAdapter(supportFragmentManager)
-                tab_layout.setupWithViewPager(view_pager)
+                tabLayout.setupWithViewPager(binding.viewPager)
             }
         }
     }
@@ -44,17 +46,17 @@ class ChapterListActivity : VMBaseActivity<ChapterListViewModel>(R.layout.activi
         searchView?.maxWidth = resources.displayMetrics.widthPixels
         searchView?.onActionViewCollapsed()
         searchView?.setOnCloseListener {
-            tab_layout.visible()
+            tabLayout.visible()
             false
         }
-        searchView?.setOnSearchClickListener { tab_layout.gone() }
+        searchView?.setOnSearchClickListener { tabLayout.gone() }
         searchView?.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String): Boolean {
                 return false
             }
 
             override fun onQueryTextChange(newText: String): Boolean {
-                if (tab_layout.selectedTabPosition == 1) {
+                if (tabLayout.selectedTabPosition == 1) {
                     viewModel.startBookmarkSearch(newText)
                 } else {
                     viewModel.startChapterListSearch(newText)
@@ -78,7 +80,7 @@ class ChapterListActivity : VMBaseActivity<ChapterListViewModel>(R.layout.activi
             return 2
         }
 
-        override fun getPageTitle(position: Int): CharSequence? {
+        override fun getPageTitle(position: Int): CharSequence {
             return when (position) {
                 1 -> getString(R.string.bookmark)
                 else -> getString(R.string.chapter_list)
@@ -88,9 +90,9 @@ class ChapterListActivity : VMBaseActivity<ChapterListViewModel>(R.layout.activi
     }
 
     override fun onBackPressed() {
-        if (tab_layout.isGone) {
+        if (tabLayout.isGone) {
             searchView?.onActionViewCollapsed()
-            tab_layout.visible()
+            tabLayout.visible()
         } else {
             super.onBackPressed()
         }

app/src/main/java/io/legado/app/ui/config/ConfigActivity.kt

@@ -4,11 +4,11 @@ import android.os.Bundle
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.EventBus
+import io.legado.app.databinding.ActivityConfigBinding
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.observeEvent
-import kotlinx.android.synthetic.main.activity_config.*
 
-class ConfigActivity : VMBaseActivity<ConfigViewModel>(R.layout.activity_config) {
+class ConfigActivity : VMBaseActivity<ActivityConfigBinding, ConfigViewModel>() {
     override val viewModel: ConfigViewModel
         get() = getViewModel(ConfigViewModel::class.java)
 
@@ -19,7 +19,7 @@ class ConfigActivity : VMBaseActivity<ConfigViewModel>(R.layout.activity_config)
 
         when (viewModel.configType) {
             ConfigViewModel.TYPE_CONFIG -> {
-                title_bar.title = getString(R.string.other_setting)
+                binding.titleBar.title = getString(R.string.other_setting)
                 val fTag = "otherConfigFragment"
                 var configFragment = supportFragmentManager.findFragmentByTag(fTag)
                 if (configFragment == null) configFragment = OtherConfigFragment()
@@ -28,7 +28,7 @@ class ConfigActivity : VMBaseActivity<ConfigViewModel>(R.layout.activity_config)
                     .commit()
             }
             ConfigViewModel.TYPE_THEME_CONFIG -> {
-                title_bar.title = getString(R.string.theme_setting)
+                binding.titleBar.title = getString(R.string.theme_setting)
                 val fTag = "themeConfigFragment"
                 var configFragment = supportFragmentManager.findFragmentByTag(fTag)
                 if (configFragment == null) configFragment = ThemeConfigFragment()
@@ -37,7 +37,7 @@ class ConfigActivity : VMBaseActivity<ConfigViewModel>(R.layout.activity_config)
                     .commit()
             }
             ConfigViewModel.TYPE_WEB_DAV_CONFIG -> {
-                title_bar.title = getString(R.string.backup_restore)
+                binding.titleBar.title = getString(R.string.backup_restore)
                 val fTag = "backupConfigFragment"
                 var configFragment = supportFragmentManager.findFragmentByTag(fTag)
                 if (configFragment == null) configFragment = BackupConfigFragment()

app/src/main/java/io/legado/app/ui/filepicker/FilePicker.kt

@@ -5,7 +5,6 @@ import android.os.Build
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import io.legado.app.R
-import io.legado.app.base.BaseActivity
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.lib.dialogs.alert
@@ -116,7 +115,7 @@ object FilePicker {
     }
 
     fun selectFile(
-        activity: BaseActivity,
+        activity: AppCompatActivity,
         requestCode: Int,
         title: String = activity.getString(R.string.select_file),
         allowExtensions: Array<String> = arrayOf(),

app/src/main/java/io/legado/app/ui/login/SourceLogin.kt

@@ -10,12 +10,12 @@ import android.webkit.WebView
 import android.webkit.WebViewClient
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.databinding.ActivitySourceLoginBinding
 import io.legado.app.help.http.CookieStore
 import io.legado.app.utils.snackbar
-import kotlinx.android.synthetic.main.activity_source_login.*
 
 
-class SourceLogin : BaseActivity(R.layout.activity_source_login) {
+class SourceLogin : BaseActivity<ActivitySourceLoginBinding>() {
 
     var sourceUrl: String? = null
     var loginUrl: String? = null
@@ -30,12 +30,12 @@ class SourceLogin : BaseActivity(R.layout.activity_source_login) {
 
     @SuppressLint("SetJavaScriptEnabled")
     private fun initWebView() {
-        val settings = web_view.settings
+        val settings = binding.webView.settings
         settings.setSupportZoom(true)
         settings.builtInZoomControls = true
         settings.javaScriptEnabled = true
         val cookieManager = CookieManager.getInstance()
-        web_view.webViewClient = object : WebViewClient() {
+        binding.webView.webViewClient = object : WebViewClient() {
             override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                 val cookie = cookieManager.getCookie(url)
                 sourceUrl?.let {
@@ -56,7 +56,7 @@ class SourceLogin : BaseActivity(R.layout.activity_source_login) {
             }
         }
         loginUrl?.let {
-            web_view.loadUrl(it)
+            binding.webView.loadUrl(it)
         }
     }
 
@@ -70,9 +70,9 @@ class SourceLogin : BaseActivity(R.layout.activity_source_login) {
             R.id.menu_success -> {
                 if (!checking) {
                     checking = true
-                    title_bar.snackbar(R.string.check_host_cookie)
+                    binding.titleBar.snackbar(R.string.check_host_cookie)
                     loginUrl?.let {
-                        web_view.loadUrl(it)
+                        binding.webView.loadUrl(it)
                     }
                 }
             }
@@ -82,6 +82,6 @@ class SourceLogin : BaseActivity(R.layout.activity_source_login) {
 
     override fun onDestroy() {
         super.onDestroy()
-        web_view.destroy()
+        binding.webView.destroy()
     }
 }

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -15,6 +15,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
+import io.legado.app.databinding.ActivityMainBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.BookHelp
 import io.legado.app.help.DefaultData
@@ -31,11 +32,10 @@ import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.hideSoftInput
 import io.legado.app.utils.observeEvent
-import kotlinx.android.synthetic.main.activity_main.*
 import org.jetbrains.anko.toast
 
 
-class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
+class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
     BottomNavigationView.OnNavigationItemSelectedListener,
     BottomNavigationView.OnNavigationItemReselectedListener,
     ViewPager.OnPageChangeListener by ViewPager.SimpleOnPageChangeListener() {
@@ -47,17 +47,21 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     private var pagePosition = 0
     private val fragmentMap = hashMapOf<Int, Fragment>()
 
+    override fun getViewBinding(): ActivityMainBinding {
+        return ActivityMainBinding.inflate(layoutInflater)
+    }
+
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        ATH.applyEdgeEffectColor(view_pager_main)
+        ATH.applyEdgeEffectColor(binding.viewPagerMain)
-        ATH.applyBottomNavigationColor(bottom_navigation_view)
+        ATH.applyBottomNavigationColor(binding.bottomNavigationView)
-        view_pager_main.offscreenPageLimit = 3
+        binding.viewPagerMain.offscreenPageLimit = 3
-        view_pager_main.adapter = TabFragmentPageAdapter(supportFragmentManager)
+        binding.viewPagerMain.adapter = TabFragmentPageAdapter(supportFragmentManager)
-        view_pager_main.addOnPageChangeListener(this)
+        binding.viewPagerMain.addOnPageChangeListener(this)
-        bottom_navigation_view.elevation =
+        binding.bottomNavigationView.elevation =
             if (AppConfig.elevation < 0) elevation else AppConfig.elevation.toFloat()
-        bottom_navigation_view.setOnNavigationItemSelectedListener(this)
+        binding.bottomNavigationView.setOnNavigationItemSelectedListener(this)
-        bottom_navigation_view.setOnNavigationItemReselectedListener(this)
+        binding.bottomNavigationView.setOnNavigationItemReselectedListener(this)
-        bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = AppConfig.isShowRSS
+        binding.bottomNavigationView.menu.findItem(R.id.menu_rss).isVisible = AppConfig.isShowRSS
     }
 
     override fun onPostCreate(savedInstanceState: Bundle?) {
@@ -65,21 +69,21 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         upVersion()
         //自动更新书籍
         if (AppConfig.autoRefreshBook) {
-            view_pager_main.postDelayed({
+            binding.viewPagerMain.postDelayed({
                 viewModel.upAllBookToc()
             }, 1000)
         }
-        view_pager_main.postDelayed({
+        binding.viewPagerMain.postDelayed({
             viewModel.postLoad()
         }, 3000)
     }
 
     override fun onNavigationItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
-            R.id.menu_bookshelf -> view_pager_main.setCurrentItem(0, false)
+            R.id.menu_bookshelf -> binding.viewPagerMain.setCurrentItem(0, false)
-            R.id.menu_explore -> view_pager_main.setCurrentItem(1, false)
+            R.id.menu_explore -> binding.viewPagerMain.setCurrentItem(1, false)
-            R.id.menu_rss -> view_pager_main.setCurrentItem(2, false)
+            R.id.menu_rss -> binding.viewPagerMain.setCurrentItem(2, false)
-            R.id.menu_my_config -> view_pager_main.setCurrentItem(3, false)
+            R.id.menu_my_config -> binding.viewPagerMain.setCurrentItem(3, false)
         }
         return false
     }
@@ -119,14 +123,14 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     }
 
     override fun onPageSelected(position: Int) {
-        view_pager_main.hideSoftInput()
+        binding.viewPagerMain.hideSoftInput()
         pagePosition = position
         when (position) {
-            0, 1, 3 -> bottom_navigation_view.menu.getItem(position).isChecked = true
+            0, 1, 3 -> binding.bottomNavigationView.menu.getItem(position).isChecked = true
             2 -> if (AppConfig.isShowRSS) {
-                bottom_navigation_view.menu.getItem(position).isChecked = true
+                binding.bottomNavigationView.menu.getItem(position).isChecked = true
             } else {
-                bottom_navigation_view.menu.getItem(3).isChecked = true
+                binding.bottomNavigationView.menu.getItem(3).isChecked = true
             }
         }
     }
@@ -136,7 +140,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
             when (keyCode) {
                 KeyEvent.KEYCODE_BACK -> if (event.isTracking && !event.isCanceled) {
                     if (pagePosition != 0) {
-                        view_pager_main.currentItem = 0
+                        binding.viewPagerMain.currentItem = 0
                         return true
                     }
                     if (System.currentTimeMillis() - exitTime > 2000) {
@@ -173,10 +177,11 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
             recreate()
         }
         observeEvent<String>(EventBus.SHOW_RSS) {
-            bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = AppConfig.isShowRSS
+            binding.bottomNavigationView.menu.findItem(R.id.menu_rss).isVisible =
-            view_pager_main.adapter?.notifyDataSetChanged()
+                AppConfig.isShowRSS
+            binding.viewPagerMain.adapter?.notifyDataSetChanged()
             if (AppConfig.isShowRSS) {
-                view_pager_main.setCurrentItem(3, false)
+                binding.viewPagerMain.setCurrentItem(3, false)
             }
         }
         observeEvent<String>(PreferKey.threadCount) {

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfFragment.kt

@@ -208,7 +208,7 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
     private inner class TabFragmentPageAdapter(fm: FragmentManager) :
         FragmentStatePagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
 
-        override fun getPageTitle(position: Int): CharSequence? {
+        override fun getPageTitle(position: Int): CharSequence {
             return bookGroups[position].groupName
         }
 

app/src/main/java/io/legado/app/ui/main/rss/RssAdapter.kt

@@ -7,8 +7,8 @@ import io.legado.app.R
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.RssSource
+import io.legado.app.databinding.ItemRssBinding
 import io.legado.app.help.ImageLoader
-import kotlinx.android.synthetic.main.item_rss.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.sdk27.listeners.onLongClick
 
@@ -16,29 +16,31 @@ class RssAdapter(context: Context, val callBack: CallBack) :
     SimpleRecyclerAdapter<RssSource>(context, R.layout.item_rss) {
 
     override fun convert(holder: ItemViewHolder, item: RssSource, payloads: MutableList<Any>) {
-        with(holder.itemView) {
+        ItemRssBinding.bind(holder.itemView).apply {
-            tv_name.text = item.sourceName
+            tvName.text = item.sourceName
             ImageLoader.load(context, item.sourceIcon)
                 .centerCrop()
                 .placeholder(R.drawable.image_rss)
                 .error(R.drawable.image_rss)
-                .into(iv_icon)
+                .into(ivIcon)
         }
     }
 
     override fun registerListener(holder: ItemViewHolder) {
-        holder.itemView.onClick {
+        ItemRssBinding.bind(holder.itemView).apply {
+            root.onClick {
                 getItem(holder.layoutPosition)?.let {
                     callBack.openRss(it)
                 }
             }
-        holder.itemView.onLongClick {
+            root.onLongClick {
                 getItem(holder.layoutPosition)?.let {
-                showMenu(holder.itemView.iv_icon, it)
+                    showMenu(ivIcon, it)
                 }
                 true
             }
         }
+    }
 
     private fun showMenu(view: View, rssSource: RssSource) {
         val popupMenu = PopupMenu(context, view)

app/src/main/java/io/legado/app/ui/qrcode/QrCodeActivity.kt

@@ -10,28 +10,26 @@ import android.view.View
 import cn.bingoogolapple.qrcode.core.QRCodeView
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.databinding.ActivityQrcodeCaptureBinding
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.utils.readBytes
-import kotlinx.android.synthetic.main.activity_qrcode_capture.*
-import kotlinx.android.synthetic.main.view_title_bar.*
 import org.jetbrains.anko.toast
 
-class QrCodeActivity : BaseActivity(R.layout.activity_qrcode_capture), QRCodeView.Delegate {
+class QrCodeActivity : BaseActivity<ActivityQrcodeCaptureBinding>(), QRCodeView.Delegate {
 
     private val requestQrImage = 202
     private var flashlightIsOpen: Boolean = false
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        setSupportActionBar(toolbar)
+        binding.zXingView.setDelegate(this)
-        zxingview.setDelegate(this)
+        binding.fabFlashlight.setOnClickListener {
-        fab_flashlight.setOnClickListener {
             if (flashlightIsOpen) {
                 flashlightIsOpen = false
-                zxingview.closeFlashlight()
+                binding.zXingView.closeFlashlight()
             } else {
                 flashlightIsOpen = true
-                zxingview.openFlashlight()
+                binding.zXingView.openFlashlight()
             }
         }
     }
@@ -63,21 +61,21 @@ class QrCodeActivity : BaseActivity(R.layout.activity_qrcode_capture), QRCodeVie
             .addPermissions(*Permissions.Group.CAMERA)
             .rationale(R.string.qr_per)
             .onGranted {
-                zxingview.visibility = View.VISIBLE
+                binding.zXingView.visibility = View.VISIBLE
                 //TODO 显示扫描框，并开始识别
-                zxingview.startSpotAndShowRect()
+                binding.zXingView.startSpotAndShowRect()
             }.request()
     }
 
     override fun onStop() {
         //TODO 关闭摄像头预览，并且隐藏扫描框
-        zxingview.stopCamera()
+        binding.zXingView.stopCamera()
         super.onStop()
     }
 
     override fun onDestroy() {
         //TODO 销毁二维码扫描控件
-        zxingview.onDestroy()
+        binding.zXingView.onDestroy()
         super.onDestroy()
     }
 
@@ -100,13 +98,13 @@ class QrCodeActivity : BaseActivity(R.layout.activity_qrcode_capture), QRCodeVie
         super.onActivityResult(requestCode, resultCode, data)
         data?.data?.let {
             //TODO 显示扫描框，并开始识别
-            zxingview.startSpotAndShowRect()
+            binding.zXingView.startSpotAndShowRect()
 
             if (resultCode == Activity.RESULT_OK && requestCode == requestQrImage) {
                 // 本来就用到 QRCodeView 时可直接调 QRCodeView 的方法，走通用的回调
                 it.readBytes(this)?.let { bytes ->
                     val bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
-                    zxingview.decodeQRCode(bitmap)
+                    binding.zXingView.decodeQRCode(bitmap)
                 }
             }
         }

app/src/main/java/io/legado/app/ui/replace/ReplaceRuleActivity.kt

@@ -19,6 +19,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppPattern
 import io.legado.app.data.entities.ReplaceRule
+import io.legado.app.databinding.ActivityReplaceRuleBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.lib.dialogs.alert
@@ -35,9 +36,6 @@ import io.legado.app.ui.widget.recycler.ItemTouchCallback
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.ui.widget.text.AutoCompleteTextView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_replace_rule.*
-import kotlinx.android.synthetic.main.dialog_edit_text.view.*
-import kotlinx.android.synthetic.main.view_search.*
 import org.jetbrains.anko.startActivity
 import org.jetbrains.anko.toast
 import java.io.File
@@ -45,8 +43,7 @@ import java.io.File
 /**
  * 替换规则管理
  */
-class ReplaceRuleActivity :
+class ReplaceRuleActivity : VMBaseActivity<ActivityReplaceRuleBinding, ReplaceRuleViewModel>(),
-    VMBaseActivity<ReplaceRuleViewModel>(R.layout.activity_replace_rule),
     SearchView.OnQueryTextListener,
     PopupMenu.OnMenuItemClickListener,
     FilePickerDialog.CallBack,
@@ -83,29 +80,31 @@ class ReplaceRuleActivity :
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
         adapter = ReplaceRuleAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
         val itemTouchCallback = ItemTouchCallback(adapter)
         itemTouchCallback.isCanDrag = true
         val dragSelectTouchHelper: DragSelectTouchHelper =
             DragSelectTouchHelper(adapter.initDragSelectTouchHelperCallback()).setSlideArea(16, 50)
-        dragSelectTouchHelper.attachToRecyclerView(recycler_view)
+        dragSelectTouchHelper.attachToRecyclerView(binding.recyclerView)
         // When this page is opened, it is in selection mode
         dragSelectTouchHelper.activeSlideSelect()
 
         // Note: need judge selection first, so add ItemTouchHelper after it.
-        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(recycler_view)
+        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(binding.recyclerView)
     }
 
     private fun initSearchView() {
-        ATH.setTint(search_view, primaryTextColor)
+        binding.titleBar.findViewById<SearchView>(R.id.search_view).let {
-        search_view.onActionViewExpanded()
+            ATH.setTint(it, primaryTextColor)
-        search_view.queryHint = getString(R.string.replace_purify_search)
+            it.onActionViewExpanded()
-        search_view.clearFocus()
+            it.queryHint = getString(R.string.replace_purify_search)
-        search_view.setOnQueryTextListener(this)
+            it.clearFocus()
+            it.setOnQueryTextListener(this)
+        }
     }
 
     override fun selectAll(selectAll: Boolean) {
@@ -125,10 +124,10 @@ class ReplaceRuleActivity :
     }
 
     private fun initSelectActionView() {
-        select_action_bar.setMainActionText(R.string.delete)
+        binding.selectActionBar.setMainActionText(R.string.delete)
-        select_action_bar.inflateMenu(R.menu.replace_rule_sel)
+        binding.selectActionBar.inflateMenu(R.menu.replace_rule_sel)
-        select_action_bar.setOnMenuItemClickListener(this)
+        binding.selectActionBar.setOnMenuItemClickListener(this)
-        select_action_bar.setCallBack(this)
+        binding.selectActionBar.setCallBack(this)
     }
 
     private fun delSourceDialog() {
@@ -180,7 +179,8 @@ class ReplaceRuleActivity :
             R.id.menu_import_source_local -> FilePicker
                 .selectFile(this, importRequestCode, allowExtensions = arrayOf("txt", "json"))
             else -> if (item.groupId == R.id.replace_group) {
-                search_view.setQuery(item.title, true)
+                binding.titleBar.findViewById<SearchView>(R.id.search_view)
+                    .setQuery(item.title, true)
             }
         }
         return super.onCompatOptionsItemSelected(item)
@@ -213,9 +213,9 @@ class ReplaceRuleActivity :
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setFilterValues(cacheUrls)
+                    editText?.setFilterValues(cacheUrls)
-                    edit_view.delCallBack = {
+                    editText?.delCallBack = {
                         cacheUrls.remove(it)
                         aCache.put(importRecordKey, cacheUrls.joinToString(","))
                     }
@@ -281,7 +281,10 @@ class ReplaceRuleActivity :
     }
 
     override fun upCountView() {
-        select_action_bar.upCountView(adapter.getSelection().size, adapter.getActualItemCount())
+        binding.selectActionBar.upCountView(
+            adapter.getSelection().size,
+            adapter.getActualItemCount()
+        )
     }
 
     override fun update(vararg rule: ReplaceRule) {

app/src/main/java/io/legado/app/ui/replace/edit/ReplaceEditActivity.kt

@@ -15,13 +15,13 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.EventBus
 import io.legado.app.data.entities.ReplaceRule
+import io.legado.app.databinding.ActivityReplaceEditBinding
 import io.legado.app.ui.widget.KeyboardToolPop
 import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.postEvent
 import kotlinx.android.synthetic.main.activity_replace_edit.*
 import org.jetbrains.anko.displayMetrics
-import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.selector
 import org.jetbrains.anko.toast
 import kotlin.math.abs
@@ -30,7 +30,7 @@ import kotlin.math.abs
  * 编辑替换规则
  */
 class ReplaceEditActivity :
-    VMBaseActivity<ReplaceEditViewModel>(R.layout.activity_replace_edit, false),
+    VMBaseActivity<ActivityReplaceEditBinding, ReplaceEditViewModel>(false),
     ViewTreeObserver.OnGlobalLayoutListener,
     KeyboardToolPop.CallBack {
 
@@ -58,6 +58,10 @@ class ReplaceEditActivity :
     private var mSoftKeyboardTool: PopupWindow? = null
     private var mIsSoftKeyBoardShowing = false
 
+    override fun getViewBinding(): ActivityReplaceEditBinding {
+        return ActivityReplaceEditBinding.inflate(layoutInflater)
+    }
+
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         mSoftKeyboardTool = KeyboardToolPop(this, AppConst.keyboardToolChars, this)
         window.decorView.viewTreeObserver.addOnGlobalLayoutListener(this)

app/src/main/java/io/legado/app/ui/rss/article/RssSortActivity.kt

@@ -10,14 +10,14 @@ import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentStatePagerAdapter
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivityRssArtivlesBinding
 import io.legado.app.ui.rss.source.edit.RssSourceEditActivity
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.gone
 import io.legado.app.utils.visible
-import kotlinx.android.synthetic.main.activity_rss_artivles.*
 import org.jetbrains.anko.startActivityForResult
 
-class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_artivles) {
+class RssSortActivity : VMBaseActivity<ActivityRssArtivlesBinding, RssSortViewModel>() {
 
     override val viewModel: RssSortViewModel
         get() = getViewModel(RssSortViewModel::class.java)
@@ -27,10 +27,10 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         adapter = TabFragmentPageAdapter(supportFragmentManager)
-        tab_layout.setupWithViewPager(view_pager)
+        binding.tabLayout.setupWithViewPager(binding.viewPager)
-        view_pager.adapter = adapter
+        binding.viewPager.adapter = adapter
         viewModel.titleLiveData.observe(this, {
-            title_bar.title = it
+            binding.titleBar.title = it
         })
         viewModel.initData(intent) {
             upFragments()
@@ -66,9 +66,9 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
             fragments[it.key] = RssArticlesFragment.create(it.key, it.value)
         }
         if (fragments.size == 1) {
-            tab_layout.gone()
+            binding.tabLayout.gone()
         } else {
-            tab_layout.visible()
+            binding.tabLayout.visible()
         }
         adapter.notifyDataSetChanged()
     }
@@ -91,7 +91,7 @@ class RssSortActivity : VMBaseActivity<RssSortViewModel>(R.layout.activity_rss_a
             return POSITION_NONE
         }
 
-        override fun getPageTitle(position: Int): CharSequence? {
+        override fun getPageTitle(position: Int): CharSequence {
             return fragments.keys.elementAt(position)
         }
 

app/src/main/java/io/legado/app/ui/rss/favorites/RssFavoritesActivity.kt

@@ -4,17 +4,15 @@ import android.os.Bundle
 import androidx.lifecycle.LiveData
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.App
-import io.legado.app.R
 import io.legado.app.base.BaseActivity
 import io.legado.app.data.entities.RssStar
-import io.legado.app.lib.theme.ATH
+import io.legado.app.databinding.ActivityRssFavoritesBinding
 import io.legado.app.ui.rss.read.ReadRssActivity
 import io.legado.app.ui.widget.recycler.VerticalDivider
-import kotlinx.android.synthetic.main.view_refresh_recycler.*
 import org.jetbrains.anko.startActivity
 
 
-class RssFavoritesActivity : BaseActivity(R.layout.activity_rss_favorites),
+class RssFavoritesActivity : BaseActivity<ActivityRssFavoritesBinding>(),
     RssFavoritesAdapter.CallBack {
 
     private var liveData: LiveData<List<RssStar>>? = null
@@ -26,11 +24,12 @@ class RssFavoritesActivity : BaseActivity(R.layout.activity_rss_favorites),
     }
 
     private fun initView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        binding.refreshRecyclerView.recyclerView.let {
-        recycler_view.layoutManager = LinearLayoutManager(this)
+            it.layoutManager = LinearLayoutManager(this)
-        recycler_view.addItemDecoration(VerticalDivider(this))
+            it.addItemDecoration(VerticalDivider(this))
             adapter = RssFavoritesAdapter(this, this)
-        recycler_view.adapter = adapter
+            it.adapter = adapter
+        }
     }
 
     private fun initData() {

app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt

@@ -13,6 +13,7 @@ import android.webkit.*
 import androidx.core.view.size
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivityRssReadBinding
 import io.legado.app.lib.theme.DrawableUtils
 import io.legado.app.lib.theme.primaryTextColor
 import io.legado.app.service.help.Download
@@ -22,7 +23,6 @@ import io.legado.app.ui.association.ImportRssSourceActivity
 import io.legado.app.ui.filepicker.FilePicker
 import io.legado.app.ui.filepicker.FilePickerDialog
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_rss_read.*
 import kotlinx.coroutines.launch
 import org.apache.commons.text.StringEscapeUtils
 import org.jetbrains.anko.downloadManager
@@ -30,7 +30,7 @@ import org.jetbrains.anko.share
 import org.jsoup.Jsoup
 
 
-class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_read, false),
+class ReadRssActivity : VMBaseActivity<ActivityRssReadBinding, ReadRssViewModel>(false),
     FilePickerDialog.CallBack,
     ReadRssViewModel.CallBack {
 
@@ -45,7 +45,7 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         viewModel.callBack = this
-        title_bar.title = intent.getStringExtra("title")
+        binding.titleBar.title = intent.getStringExtra("title")
         initWebView()
         initLiveData()
         viewModel.initData(intent)
@@ -91,21 +91,21 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
     }
 
     private fun initWebView() {
-        web_view.webChromeClient = object : WebChromeClient() {
+        binding.webView.webChromeClient = object : WebChromeClient() {
             override fun onShowCustomView(view: View?, callback: CustomViewCallback?) {
                 requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR
-                ll_view.invisible()
+                binding.llView.invisible()
-                custom_web_view.addView(view)
+                binding.customWebView.addView(view)
                 customWebViewCallback = callback
             }
 
             override fun onHideCustomView() {
-                custom_web_view.removeAllViews()
+                binding.customWebView.removeAllViews()
-                ll_view.visible()
+                binding.llView.visible()
                 requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
             }
         }
-        web_view.webViewClient = object : WebViewClient() {
+        binding.webView.webViewClient = object : WebViewClient() {
             override fun shouldOverrideUrlLoading(
                 view: WebView?,
                 request: WebResourceRequest?
@@ -158,13 +158,13 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
                 return true
             }
         }
-        web_view.settings.apply {
+        binding.webView.settings.apply {
             mixedContentMode = WebSettings.MIXED_CONTENT_ALWAYS_ALLOW
             domStorageEnabled = true
             allowContentAccess = true
         }
-        web_view.setOnLongClickListener {
+        binding.webView.setOnLongClickListener {
-            val hitTestResult = web_view.hitTestResult
+            val hitTestResult = binding.webView.hitTestResult
             if (hitTestResult.type == WebView.HitTestResult.IMAGE_TYPE ||
                 hitTestResult.type == WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE
             ) {
@@ -176,9 +176,9 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
             }
             return@setOnLongClickListener false
         }
-        web_view.setDownloadListener { url, _, contentDisposition, _, _ ->
+        binding.webView.setDownloadListener { url, _, contentDisposition, _, _ ->
             val fileName = URLUtil.guessFileName(url, contentDisposition, null)
-            ll_view.longSnackbar(fileName, getString(R.string.action_download)) {
+            binding.llView.longSnackbar(fileName, getString(R.string.action_download)) {
                 // 指定下载地址
                 val request = DownloadManager.Request(Uri.parse(url))
                 // 允许媒体扫描，根据下载的文件类型被加入相册、音乐等媒体库
@@ -229,7 +229,7 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
                 val url = NetworkUtils.getAbsoluteURL(it.origin, it.link)
                 val html = viewModel.clHtml(content)
                 if (viewModel.rssSource?.loadWithBaseUrl == true) {
-                    web_view.loadDataWithBaseURL(
+                    binding.webView.loadDataWithBaseURL(
                         url,
                         html,
                         "text/html",
@@ -237,7 +237,7 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
                         url
                     )//不想用baseUrl进else
                 } else {
-                    web_view.loadDataWithBaseURL(
+                    binding.webView.loadDataWithBaseURL(
                         null,
                         html,
                         "text/html;charset=utf-8",
@@ -249,14 +249,14 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
         })
         viewModel.urlLiveData.observe(this, {
             upJavaScriptEnable()
-            web_view.loadUrl(it.url, it.headerMap)
+            binding.webView.loadUrl(it.url, it.headerMap)
         })
     }
 
     @SuppressLint("SetJavaScriptEnabled")
     private fun upJavaScriptEnable() {
         if (viewModel.rssSource?.enableJs == true) {
-            web_view.settings.javaScriptEnabled = true
+            binding.webView.settings.javaScriptEnabled = true
         }
     }
 
@@ -297,12 +297,12 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
     override fun onKeyUp(keyCode: Int, event: KeyEvent?): Boolean {
         event?.let {
             when (keyCode) {
-                KeyEvent.KEYCODE_BACK -> if (event.isTracking && !event.isCanceled && web_view.canGoBack()) {
+                KeyEvent.KEYCODE_BACK -> if (event.isTracking && !event.isCanceled && binding.webView.canGoBack()) {
-                    if (custom_web_view.size > 0) {
+                    if (binding.customWebView.size > 0) {
                         customWebViewCallback?.onCustomViewHidden()
                         return true
-                    } else if (web_view.copyBackForwardList().size > 1) {
+                    } else if (binding.webView.copyBackForwardList().size > 1) {
-                        web_view.goBack()
+                        binding.webView.goBack()
                         return true
                     }
                 }
@@ -317,8 +317,8 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
             viewModel.textToSpeech?.stop()
             upTtsMenu(false)
         } else {
-            web_view.settings.javaScriptEnabled = true
+            binding.webView.settings.javaScriptEnabled = true
-            web_view.evaluateJavascript("document.documentElement.outerHTML") {
+            binding.webView.evaluateJavascript("document.documentElement.outerHTML") {
                 val html = StringEscapeUtils.unescapeJson(it)
                     .replace("^\"|\"$".toRegex(), "")
                 Jsoup.parse(html).text()
@@ -339,7 +339,7 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
 
     override fun onDestroy() {
         super.onDestroy()
-        web_view.destroy()
+        binding.webView.destroy()
     }
 
 }

app/src/main/java/io/legado/app/ui/rss/source/debug/RssSourceDebugActivity.kt

@@ -1,19 +1,17 @@
 package io.legado.app.ui.rss.source.debug
 
 import android.os.Bundle
-import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
+import io.legado.app.databinding.ActivitySourceDebugBinding
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.gone
-import kotlinx.android.synthetic.main.activity_source_debug.*
-import kotlinx.android.synthetic.main.view_search.*
 import kotlinx.coroutines.launch
 import org.jetbrains.anko.toast
 
 
-class RssSourceDebugActivity : VMBaseActivity<RssSourceDebugModel>(R.layout.activity_source_debug) {
+class RssSourceDebugActivity : VMBaseActivity<ActivitySourceDebugBinding, RssSourceDebugModel>() {
 
     override val viewModel: RssSourceDebugModel
         get() = getViewModel(RssSourceDebugModel::class.java)
@@ -27,7 +25,7 @@ class RssSourceDebugActivity : VMBaseActivity<RssSourceDebugModel>(R.layout.acti
             launch {
                 adapter.addItem(msg)
                 if (state == -1 || state == 1000) {
-                    rotate_loading.hide()
+                    binding.rotateLoading.hide()
                 }
             }
         }
@@ -37,20 +35,20 @@ class RssSourceDebugActivity : VMBaseActivity<RssSourceDebugModel>(R.layout.acti
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
         adapter = RssSourceDebugAdapter(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
-        rotate_loading.loadingColor = accentColor
+        binding.rotateLoading.loadingColor = accentColor
     }
 
     private fun initSearchView() {
-        search_view.gone()
+        binding.recyclerView.gone()
     }
 
     private fun startSearch() {
         adapter.clearItems()
         viewModel.startDebug({
-            rotate_loading.show()
+            binding.rotateLoading.show()
         }, {
             toast("未获取到源")
         })

app/src/main/java/io/legado/app/ui/rss/source/edit/RssSourceEditActivity.kt

@@ -15,6 +15,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppConst
 import io.legado.app.data.entities.RssSource
+import io.legado.app.databinding.ActivityRssSourceEditBinding
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.ATH
 import io.legado.app.ui.qrcode.QrCodeActivity
@@ -25,12 +26,11 @@ import io.legado.app.utils.GSON
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.sendToClip
 import io.legado.app.utils.shareWithQr
-import kotlinx.android.synthetic.main.activity_rss_source_edit.*
 import org.jetbrains.anko.*
 import kotlin.math.abs
 
 class RssSourceEditActivity :
-    VMBaseActivity<RssSourceEditViewModel>(R.layout.activity_rss_source_edit, false),
+    VMBaseActivity<ActivityRssSourceEditBinding, RssSourceEditViewModel>(false),
     ViewTreeObserver.OnGlobalLayoutListener,
     KeyboardToolPop.CallBack {
 
@@ -43,7 +43,6 @@ class RssSourceEditActivity :
     override val viewModel: RssSourceEditViewModel
         get() = getViewModel(RssSourceEditViewModel::class.java)
 
-
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         initView()
         viewModel.initData(intent) {
@@ -105,18 +104,18 @@ class RssSourceEditActivity :
     }
 
     private fun initView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
         mSoftKeyboardTool = KeyboardToolPop(this, AppConst.keyboardToolChars, this)
         window.decorView.viewTreeObserver.addOnGlobalLayoutListener(this)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
     }
 
     private fun upRecyclerView(rssSource: RssSource? = viewModel.rssSource) {
         rssSource?.let {
-            cb_is_enable.isChecked = rssSource.enabled
+            binding.cbIsEnable.isChecked = rssSource.enabled
-            cb_enable_js.isChecked = rssSource.enableJs
+            binding.cbEnableJs.isChecked = rssSource.enableJs
-            cb_enable_base_url.isChecked = rssSource.loadWithBaseUrl
+            binding.cbEnableBaseUrl.isChecked = rssSource.loadWithBaseUrl
         }
         sourceEntities.clear()
         sourceEntities.apply {
@@ -141,9 +140,9 @@ class RssSourceEditActivity :
 
     private fun getRssSource(): RssSource {
         val source = viewModel.rssSource
-        source.enabled = cb_is_enable.isChecked
+        source.enabled = binding.cbIsEnable.isChecked
-        source.enableJs = cb_enable_js.isChecked
+        source.enableJs = binding.cbEnableJs.isChecked
-        source.loadWithBaseUrl = cb_enable_base_url.isChecked
+        source.loadWithBaseUrl = binding.cbEnableBaseUrl.isChecked
         sourceEntities.forEach {
             when (it.key) {
                 "sourceName" -> source.sourceName = it.value ?: ""
@@ -222,7 +221,7 @@ class RssSourceEditActivity :
         mSoftKeyboardTool?.let {
             if (it.isShowing) return
             if (!isFinishing) {
-                it.showAtLocation(ll_content, Gravity.BOTTOM, 0, 0)
+                it.showAtLocation(binding.root, Gravity.BOTTOM, 0, 0)
             }
         }
     }
@@ -240,11 +239,11 @@ class RssSourceEditActivity :
         val preShowing = mIsSoftKeyBoardShowing
         if (abs(keyboardHeight) > screenHeight / 5) {
             mIsSoftKeyBoardShowing = true // 超过屏幕五分之一则表示弹出了输入法
-            recycler_view.setPadding(0, 0, 0, 100)
+            binding.recyclerView.setPadding(0, 0, 0, 100)
             showKeyboardTopPopupWindow()
         } else {
             mIsSoftKeyBoardShowing = false
-            recycler_view.setPadding(0, 0, 0, 0)
+            binding.recyclerView.setPadding(0, 0, 0, 0)
             if (preShowing) {
                 closePopupWindow()
             }

app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceActivity.kt

@@ -19,6 +19,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.AppPattern
 import io.legado.app.data.entities.RssSource
+import io.legado.app.databinding.ActivityRssSourceBinding
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.ATH
@@ -34,9 +35,6 @@ import io.legado.app.ui.widget.recycler.ItemTouchCallback
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.ui.widget.text.AutoCompleteTextView
 import io.legado.app.utils.*
-import kotlinx.android.synthetic.main.activity_rss_source.*
-import kotlinx.android.synthetic.main.dialog_edit_text.view.*
-import kotlinx.android.synthetic.main.view_search.*
 import org.jetbrains.anko.startActivity
 import org.jetbrains.anko.startActivityForResult
 import org.jetbrains.anko.toast
@@ -45,7 +43,7 @@ import java.text.Collator
 import java.util.*
 
 
-class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_rss_source),
+class RssSourceActivity : VMBaseActivity<ActivityRssSourceBinding, RssSourceViewModel>(),
     PopupMenu.OnMenuItemClickListener,
     FilePickerDialog.CallBack,
     SelectActionBar.CallBack,
@@ -91,7 +89,8 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
             R.id.menu_group_manage -> GroupManageDialog()
                 .show(supportFragmentManager, "rssGroupManage")
             else -> if (item.groupId == R.id.source_group) {
-                search_view.setQuery(item.title, true)
+                binding.titleBar.findViewById<SearchView>(R.id.search_view)
+                    .setQuery(item.title, true)
             }
         }
         return super.onCompatOptionsItemSelected(item)
@@ -110,29 +109,30 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
     }
 
     private fun initRecyclerView() {
-        ATH.applyEdgeEffectColor(recycler_view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
-        recycler_view.layoutManager = LinearLayoutManager(this)
+        binding.recyclerView.layoutManager = LinearLayoutManager(this)
-        recycler_view.addItemDecoration(VerticalDivider(this))
+        binding.recyclerView.addItemDecoration(VerticalDivider(this))
         adapter = RssSourceAdapter(this, this)
-        recycler_view.adapter = adapter
+        binding.recyclerView.adapter = adapter
         val itemTouchCallback = ItemTouchCallback(adapter)
         itemTouchCallback.isCanDrag = true
         val dragSelectTouchHelper: DragSelectTouchHelper =
             DragSelectTouchHelper(adapter.initDragSelectTouchHelperCallback()).setSlideArea(16, 50)
-        dragSelectTouchHelper.attachToRecyclerView(recycler_view)
+        dragSelectTouchHelper.attachToRecyclerView(binding.recyclerView)
         // When this page is opened, it is in selection mode
         dragSelectTouchHelper.activeSlideSelect()
 
         // Note: need judge selection first, so add ItemTouchHelper after it.
-        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(recycler_view)
+        ItemTouchHelper(itemTouchCallback).attachToRecyclerView(binding.recyclerView)
     }
 
     private fun initSearchView() {
-        ATH.setTint(search_view, primaryTextColor)
+        binding.titleBar.findViewById<SearchView>(R.id.search_view).let {
-        search_view.onActionViewExpanded()
+            ATH.setTint(it, primaryTextColor)
-        search_view.queryHint = getString(R.string.search_rss_source)
+            it.onActionViewExpanded()
-        search_view.clearFocus()
+            it.queryHint = getString(R.string.search_rss_source)
-        search_view.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+            it.clearFocus()
+            it.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
                 override fun onQueryTextSubmit(query: String?): Boolean {
                     return false
                 }
@@ -143,6 +143,7 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
                 }
             })
         }
+    }
 
     private fun initLiveDataGroup() {
         App.db.rssSourceDao().liveGroup().observe(this, {
@@ -171,10 +172,10 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
     }
 
     private fun initViewEvent() {
-        select_action_bar.setMainActionText(R.string.delete)
+        binding.selectActionBar.setMainActionText(R.string.delete)
-        select_action_bar.inflateMenu(R.menu.rss_source_sel)
+        binding.selectActionBar.inflateMenu(R.menu.rss_source_sel)
-        select_action_bar.setOnMenuItemClickListener(this)
+        binding.selectActionBar.setOnMenuItemClickListener(this)
-        select_action_bar.setCallBack(this)
+        binding.selectActionBar.setCallBack(this)
     }
 
     private fun delSourceDialog() {
@@ -209,7 +210,10 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
     }
 
     override fun upCountView() {
-        select_action_bar.upCountView(adapter.getSelection().size, adapter.getActualItemCount())
+        binding.selectActionBar.upCountView(
+            adapter.getSelection().size,
+            adapter.getActualItemCount()
+        )
     }
 
     @SuppressLint("InflateParams")
@@ -223,9 +227,9 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
             var editText: AutoCompleteTextView? = null
             customView {
                 layoutInflater.inflate(R.layout.dialog_edit_text, null).apply {
-                    editText = edit_view
+                    editText = findViewById(R.id.edit_view)
-                    edit_view.setFilterValues(cacheUrls)
+                    editText?.setFilterValues(cacheUrls)
-                    edit_view.delCallBack = {
+                    editText?.delCallBack = {
                         cacheUrls.remove(it)
                         aCache.put(importRecordKey, cacheUrls.joinToString(","))
                     }

app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt

@@ -7,6 +7,7 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
 import io.legado.app.constant.PreferKey
+import io.legado.app.databinding.ActivityWelcomeBinding
 import io.legado.app.help.AppConfig
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.help.storage.SyncBookProgress
@@ -14,15 +15,14 @@ import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.ui.main.MainActivity
 import io.legado.app.utils.getPrefBoolean
-import kotlinx.android.synthetic.main.activity_welcome.*
 import org.jetbrains.anko.startActivity
 import java.util.concurrent.TimeUnit
 
-open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
+open class WelcomeActivity : BaseActivity<ActivityWelcomeBinding>() {
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        iv_book.setColorFilter(accentColor)
+        binding.ivBook.setColorFilter(accentColor)
-        vw_title_line.setBackgroundColor(accentColor)
+        binding.vwTitleLine.setBackgroundColor(accentColor)
         // 避免从桌面启动程序后，会重新实例化入口类的activity
         if (intent.flags and Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT != 0) {
             finish()
@@ -47,7 +47,7 @@ open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
             }
         }
         SyncBookProgress.downloadBookProgress()
-        root_view.postDelayed({ startMainActivity() }, 500)
+        binding.root.postDelayed({ startMainActivity() }, 500)
     }
 
     private fun startMainActivity() {

app/src/main/java/io/legado/app/ui/widget/DetailSeekBar.kt

@@ -2,15 +2,15 @@ package io.legado.app.ui.widget
 
 import android.content.Context
 import android.util.AttributeSet
-import android.view.View
+import android.view.LayoutInflater
 import android.widget.FrameLayout
 import android.widget.SeekBar
 import io.legado.app.R
+import io.legado.app.databinding.ViewDetailSeekBarBinding
 import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.lib.theme.getPrimaryTextColor
 import io.legado.app.utils.ColorUtils
 import io.legado.app.utils.progressAdd
-import kotlinx.android.synthetic.main.view_detail_seek_bar.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 
 class DetailSeekBar @JvmOverloads constructor(
@@ -18,53 +18,54 @@ class DetailSeekBar @JvmOverloads constructor(
     attrs: AttributeSet? = null
 ) : FrameLayout(context, attrs),
     SeekBar.OnSeekBarChangeListener {
+    private var binding: ViewDetailSeekBarBinding =
+        ViewDetailSeekBarBinding.inflate(LayoutInflater.from(context), this, true)
     private val isBottomBackground: Boolean
+
     var valueFormat: ((progress: Int) -> String)? = null
     var onChanged: ((progress: Int) -> Unit)? = null
     var progress: Int
-        get() = seek_bar.progress
+        get() = binding.seekBar.progress
         set(value) {
-            seek_bar.progress = value
+            binding.seekBar.progress = value
         }
     var max: Int
-        get() = seek_bar.max
+        get() = binding.seekBar.max
         set(value) {
-            seek_bar.max = value
+            binding.seekBar.max = value
         }
 
     init {
-        View.inflate(context, R.layout.view_detail_seek_bar, this)
-
         val typedArray = context.obtainStyledAttributes(attrs, R.styleable.DetailSeekBar)
         isBottomBackground =
             typedArray.getBoolean(R.styleable.DetailSeekBar_isBottomBackground, false)
-        tv_seek_title.text = typedArray.getText(R.styleable.DetailSeekBar_title)
+        binding.tvSeekTitle.text = typedArray.getText(R.styleable.DetailSeekBar_title)
-        seek_bar.max = typedArray.getInteger(R.styleable.DetailSeekBar_max, 0)
+        binding.seekBar.max = typedArray.getInteger(R.styleable.DetailSeekBar_max, 0)
         typedArray.recycle()
         if (isBottomBackground && !isInEditMode) {
             val isLight = ColorUtils.isColorLight(context.bottomBackground)
             val textColor = context.getPrimaryTextColor(isLight)
-            tv_seek_title.setTextColor(textColor)
+            binding.tvSeekTitle.setTextColor(textColor)
-            iv_seek_plus.setColorFilter(textColor)
+            binding.ivSeekPlus.setColorFilter(textColor)
-            iv_seek_reduce.setColorFilter(textColor)
+            binding.ivSeekReduce.setColorFilter(textColor)
-            tv_seek_value.setTextColor(textColor)
+            binding.tvSeekValue.setTextColor(textColor)
         }
-        iv_seek_plus.onClick {
+        binding.ivSeekPlus.onClick {
-            seek_bar.progressAdd(1)
+            binding.seekBar.progressAdd(1)
-            onChanged?.invoke(seek_bar.progress)
+            onChanged?.invoke(binding.seekBar.progress)
         }
-        iv_seek_reduce.onClick {
+        binding.ivSeekReduce.onClick {
-            seek_bar.progressAdd(-1)
+            binding.seekBar.progressAdd(-1)
-            onChanged?.invoke(seek_bar.progress)
+            onChanged?.invoke(binding.seekBar.progress)
         }
-        seek_bar.setOnSeekBarChangeListener(this)
+        binding.seekBar.setOnSeekBarChangeListener(this)
     }
 
-    private fun upValue(progress: Int = seek_bar.progress) {
+    private fun upValue(progress: Int = binding.seekBar.progress) {
         valueFormat?.let {
-            tv_seek_value.text = it.invoke(progress)
+            binding.tvSeekValue.text = it.invoke(progress)
         } ?: let {
-            tv_seek_value.text = progress.toString()
+            binding.tvSeekValue.text = progress.toString()
         }
     }
 
@@ -77,7 +78,7 @@ class DetailSeekBar @JvmOverloads constructor(
     }
 
     override fun onStopTrackingTouch(seekBar: SeekBar?) {
-        onChanged?.invoke(seek_bar.progress)
+        onChanged?.invoke(binding.seekBar.progress)
     }
 
 }

app/src/main/java/io/legado/app/ui/widget/recycler/RefreshRecyclerView.kt

@@ -9,11 +9,13 @@ import android.view.View
 import android.widget.LinearLayout
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.R
-import kotlinx.android.synthetic.main.view_refresh_recycler.view.*
+import io.legado.app.databinding.ViewRefreshRecyclerBinding
+import io.legado.app.lib.theme.ATH
 
 
+@SuppressLint("ClickableViewAccessibility")
 class RefreshRecyclerView(context: Context?, attrs: AttributeSet?) : LinearLayout(context, attrs) {
-
+    private var binding: ViewRefreshRecyclerBinding
     private var durTouchX = -1000000f
     private var durTouchY = -1000000f
 
@@ -21,8 +23,10 @@ class RefreshRecyclerView(context: Context?, attrs: AttributeSet?) : LinearLayou
 
     init {
         orientation = VERTICAL
-        LayoutInflater.from(context).inflate(R.layout.view_refresh_recycler, this, true)
+        val view = LayoutInflater.from(context).inflate(R.layout.view_refresh_recycler, this, true)
-        recycler_view.setOnTouchListener(object : OnTouchListener {
+        binding = ViewRefreshRecyclerBinding.bind(view)
+        ATH.applyEdgeEffectColor(binding.recyclerView)
+        binding.recyclerView.setOnTouchListener(object : OnTouchListener {
             @SuppressLint("ClickableViewAccessibility")
             override fun onTouch(v: View?, event: MotionEvent?): Boolean {
                 when (event?.action) {
@@ -39,26 +43,31 @@ class RefreshRecyclerView(context: Context?, attrs: AttributeSet?) : LinearLayou
 
                         val dY = event.y - durTouchY  //>0下拉
                         durTouchY = event.y
-                        if (!refresh_progress_bar.isAutoLoading && refresh_progress_bar.getSecondDurProgress() == refresh_progress_bar.secondFinalProgress) {
+                        if (!binding.refreshProgressBar.isAutoLoading &&
-                            recycler_view.adapter?.let {
+                            binding.refreshProgressBar.getSecondDurProgress() == binding.refreshProgressBar.secondFinalProgress
+                        ) {
+                            binding.recyclerView.adapter?.let {
                                 if (it.itemCount > 0) {
-                                    if (0 == (recycler_view.layoutManager as LinearLayoutManager).findFirstCompletelyVisibleItemPosition()) {
+                                    if (0 == (binding.recyclerView.layoutManager as LinearLayoutManager).findFirstCompletelyVisibleItemPosition()) {
-                                        refresh_progress_bar.setSecondDurProgress((refresh_progress_bar.getSecondDurProgress() + dY / 2).toInt())
+                                        binding.refreshProgressBar.setSecondDurProgress((binding.refreshProgressBar.getSecondDurProgress() + dY / 2).toInt())
                                     }
                                 } else {
-                                    refresh_progress_bar.setSecondDurProgress((refresh_progress_bar.getSecondDurProgress() + dY / 2).toInt())
+                                    binding.refreshProgressBar.setSecondDurProgress((binding.refreshProgressBar.getSecondDurProgress() + dY / 2).toInt())
                                 }
                             }
-                            return refresh_progress_bar.getSecondDurProgress() > 0
+                            return binding.refreshProgressBar.getSecondDurProgress() > 0
                         }
                     }
                     MotionEvent.ACTION_UP -> {
-                        if (!refresh_progress_bar.isAutoLoading && refresh_progress_bar.secondMaxProgress > 0 && refresh_progress_bar.getSecondDurProgress() > 0) {
+                        if (!binding.refreshProgressBar.isAutoLoading &&
-                            if (refresh_progress_bar.getSecondDurProgress() >= refresh_progress_bar.secondMaxProgress) {
+                            binding.refreshProgressBar.secondMaxProgress > 0 &&
-                                refresh_progress_bar.isAutoLoading = true
+                            binding.refreshProgressBar.getSecondDurProgress() > 0
+                        ) {
+                            if (binding.refreshProgressBar.getSecondDurProgress() >= binding.refreshProgressBar.secondMaxProgress) {
+                                binding.refreshProgressBar.isAutoLoading = true
                                 onRefreshStart?.invoke()
                             } else {
-                                refresh_progress_bar.setSecondDurProgressWithAnim(0)
+                                binding.refreshProgressBar.setSecondDurProgressWithAnim(0)
                             }
                         }
                         durTouchX = -1000000f
@@ -70,12 +79,14 @@ class RefreshRecyclerView(context: Context?, attrs: AttributeSet?) : LinearLayou
         })
     }
 
+    val recyclerView get() = binding.recyclerView
+
     fun startLoading() {
-        refresh_progress_bar.isAutoLoading = true
+        binding.refreshProgressBar.isAutoLoading = true
         onRefreshStart?.invoke()
     }
 
     fun stopLoading() {
-        refresh_progress_bar.isAutoLoading = false
+        binding.refreshProgressBar.isAutoLoading = false
     }
 }

app/src/main/java/io/legado/app/utils/viewbindingdelegate/DialogFragmentViewBindings.kt

@@ -0,0 +1,58 @@
+@file:Suppress("RedundantVisibilityModifier", "unused")
+
+package io.legado.app.utils.viewbindingdelegate
+
+import android.view.View
+import androidx.annotation.IdRes
+import androidx.fragment.app.DialogFragment
+import androidx.lifecycle.LifecycleOwner
+import androidx.viewbinding.ViewBinding
+
+private class DialogFragmentViewBindingProperty<F : DialogFragment, T : ViewBinding>(
+    viewBinder: (F) -> T
+) : ViewBindingProperty<F, T>(viewBinder) {
+
+    override fun getLifecycleOwner(thisRef: F): LifecycleOwner {
+        return if (thisRef.view == null) thisRef.viewLifecycleOwner else thisRef
+    }
+}
+
+/**
+ * Create new [ViewBinding] associated with the [DialogFragment]
+ */
+@JvmName("viewBindingDialogFragment")
+public fun <F : DialogFragment, T : ViewBinding> DialogFragment.dialogViewBinding(
+    viewBinder: (F) -> T
+): ViewBindingProperty<F, T> {
+    return DialogFragmentViewBindingProperty(viewBinder)
+}
+
+/**
+ * Create new [ViewBinding] associated with the [DialogFragment]
+ *
+ * @param vbFactory Function that create new instance of [ViewBinding]. `MyViewBinding::bind` can be used
+ */
+@JvmName("viewBindingDialogFragment")
+public inline fun <F : DialogFragment, T : ViewBinding> DialogFragment.dialogViewBinding(
+    crossinline vbFactory: (View) -> T,
+    crossinline viewProvider: (F) -> View
+): ViewBindingProperty<F, T> {
+    return dialogViewBinding { fragment -> vbFactory(viewProvider(fragment)) }
+}
+
+/**
+ * Create new [ViewBinding] associated with the [DialogFragment][this]
+ *
+ * @param vbFactory Function that create new instance of [ViewBinding]. `MyViewBinding::bind` can be used
+ * @param viewBindingRootId Id of the root view from your custom view
+ */
+@Suppress("unused")
+@JvmName("viewBindingDialogFragment")
+public inline fun <T : ViewBinding> DialogFragment.dialogViewBinding(
+    crossinline vbFactory: (View) -> T,
+    @IdRes viewBindingRootId: Int
+): ViewBindingProperty<DialogFragment, T> {
+    return viewBinding(vbFactory) { fragment: DialogFragment ->
+        fragment.dialog!!.window!!.decorView.findViewById(viewBindingRootId)
+    }
+}

app/src/main/java/io/legado/app/utils/viewbindingdelegate/FragmentViewBindings.kt

@@ -0,0 +1,54 @@
+@file:Suppress("RedundantVisibilityModifier", "unused")
+@file:JvmName("ReflectionFragmentViewBindings")
+
+package io.legado.app.utils.viewbindingdelegate
+
+import android.view.View
+import androidx.annotation.IdRes
+import androidx.fragment.app.Fragment
+import androidx.viewbinding.ViewBinding
+
+private class FragmentViewBindingProperty<F : Fragment, T : ViewBinding>(
+    viewBinder: (F) -> T
+) : ViewBindingProperty<F, T>(viewBinder) {
+
+    override fun getLifecycleOwner(thisRef: F) = thisRef.viewLifecycleOwner
+}
+
+/**
+ * Create new [ViewBinding] associated with the [Fragment]
+ */
+@JvmName("viewBindingFragment")
+public fun <F : Fragment, T : ViewBinding> Fragment.viewBinding(viewBinder: (F) -> T): ViewBindingProperty<F, T> {
+    return FragmentViewBindingProperty(viewBinder)
+}
+
+/**
+ * Create new [ViewBinding] associated with the [Fragment]
+ *
+ * @param vbFactory Function that create new instance of [ViewBinding]. `MyViewBinding::bind` can be used
+ * @param viewProvider Provide a [View] from the Fragment. By default call [Fragment.requireView]
+ */
+@JvmName("viewBindingFragment")
+public inline fun <F : Fragment, T : ViewBinding> Fragment.viewBinding(
+    crossinline vbFactory: (View) -> T,
+    crossinline viewProvider: (F) -> View = Fragment::requireView
+): ViewBindingProperty<F, T> {
+    return viewBinding { fragment: F -> vbFactory(viewProvider(fragment)) }
+}
+
+/**
+ * Create new [ViewBinding] associated with the [Fragment]
+ *
+ * @param vbFactory Function that create new instance of [ViewBinding]. `MyViewBinding::bind` can be used
+ * @param viewBindingRootId Root view's id that will be used as root for the view binding
+ */
+@JvmName("viewBindingFragment")
+public inline fun <T : ViewBinding> Fragment.viewBinding(
+    crossinline vbFactory: (View) -> T,
+    @IdRes viewBindingRootId: Int
+): ViewBindingProperty<Fragment, T> {
+    return viewBinding(vbFactory) { fragment: Fragment ->
+        fragment.requireView().findViewById(viewBindingRootId)
+    }
+}

app/src/main/java/io/legado/app/utils/viewbindingdelegate/ViewBindingProperty.kt

@@ -0,0 +1,57 @@
+@file:Suppress("RedundantVisibilityModifier")
+
+package io.legado.app.utils.viewbindingdelegate
+
+import android.os.Handler
+import android.os.Looper
+import androidx.annotation.MainThread
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.viewbinding.ViewBinding
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+public abstract class ViewBindingProperty<in R : Any, T : ViewBinding>(
+    private val viewBinder: (R) -> T
+) : ReadOnlyProperty<R, T> {
+
+    private var viewBinding: T? = null
+    private val lifecycleObserver = ClearOnDestroyLifecycleObserver()
+    private var thisRef: R? = null
+
+    protected abstract fun getLifecycleOwner(thisRef: R): LifecycleOwner
+
+    @MainThread
+    public override fun getValue(thisRef: R, property: KProperty<*>): T {
+        viewBinding?.let { return it }
+
+        this.thisRef = thisRef
+        val lifecycle = getLifecycleOwner(thisRef).lifecycle
+        if (lifecycle.currentState == Lifecycle.State.DESTROYED) {
+            mainHandler.post { viewBinding = null }
+        } else {
+            lifecycle.addObserver(lifecycleObserver)
+        }
+        return viewBinder(thisRef).also { viewBinding = it }
+    }
+
+    @MainThread
+    public fun clear() {
+        val thisRef = thisRef ?: return
+        this.thisRef = null
+        getLifecycleOwner(thisRef).lifecycle.removeObserver(lifecycleObserver)
+        mainHandler.post { viewBinding = null }
+    }
+
+    private inner class ClearOnDestroyLifecycleObserver : DefaultLifecycleObserver {
+
+        @MainThread
+        override fun onDestroy(owner: LifecycleOwner): Unit = clear()
+    }
+
+    private companion object {
+
+        private val mainHandler = Handler(Looper.getMainLooper())
+    }
+}

app/src/main/res/layout/activity_book_source.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/root_view"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">

app/src/main/res/layout/activity_book_source_edit.xml

@@ -2,7 +2,6 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/ll_content"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">

app/src/main/res/layout/activity_qrcode_capture.xml

@@ -5,7 +5,7 @@
     android:layout_height="match_parent">
 
     <cn.bingoogolapple.qrcode.zxing.ZXingView
-        android:id="@+id/zxingview"
+        android:id="@+id/z_xing_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:visibility="gone"

app/src/main/res/layout/activity_read_record.xml

@@ -17,7 +17,9 @@
         android:paddingTop="10dp"
         android:paddingBottom="10dp">
 
-        <include layout="@layout/item_read_record" />
+        <include
+            android:id="@+id/read_record"
+            layout="@layout/item_read_record" />
 
     </FrameLayout>
 

app/src/main/res/layout/activity_rss_source_edit.xml

@@ -2,7 +2,6 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/ll_content"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">

app/src/main/res/layout/activity_welcome.xml

@@ -2,7 +2,6 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/root_view"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.4.10'
+    ext.kotlin_version = '1.4.20'
     repositories {
         google()
         jcenter()