优化

app/src/main/java/io/legado/app/constant/PreferKey.kt

@@ -12,8 +12,8 @@ object PreferKey {
     const val speakEngine = "speakEngine"
     const val readAloudByPage = "readAloudByPage"
     const val ttsSpeechRate = "ttsSpeechRate"
-    const val prevKey = "prevKeyCode"
-    const val nextKey = "nextKeyCode"
+    const val prevKeys = "prevKeyCodes"
+    const val nextKeys = "nextKeyCodes"
     const val showRss = "showRss"
     const val bookshelfLayout = "bookshelfLayout"
     const val bookshelfSort = "bookshelfSort"

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

@@ -314,13 +314,13 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      */
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
         when (keyCode) {
-            getPrefInt(PreferKey.prevKey) -> {
+            getPrefInt(PreferKey.prevKeys) -> {
                 if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
                     page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.PREV)
                     return true
                 }
             }
-            getPrefInt(PreferKey.nextKey) -> {
+            getPrefInt(PreferKey.nextKeys) -> {
                 if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
                     page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.NEXT)
                     return true

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

@@ -6,10 +6,9 @@ import android.view.KeyEvent
 import io.legado.app.R
 import io.legado.app.constant.PreferKey
 import io.legado.app.lib.theme.backgroundColor
-import io.legado.app.utils.getPrefInt
+import io.legado.app.utils.getPrefString
 import io.legado.app.utils.hideSoftInput
-import io.legado.app.utils.putPrefInt
-import io.legado.app.utils.removePref
+import io.legado.app.utils.putPrefString
 import kotlinx.android.synthetic.main.dialog_page_key.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 
@@ -19,21 +18,11 @@ class PageKeyDialog(context: Context) : Dialog(context, R.style.AppTheme_AlertDi
     init {
         setContentView(R.layout.dialog_page_key)
         content_view.setBackgroundColor(context.backgroundColor)
-        et_prev.setText(context.getPrefInt(PreferKey.prevKey).toString())
-        et_next.setText(context.getPrefInt(PreferKey.nextKey).toString())
+        et_prev.setText(context.getPrefString(PreferKey.prevKeys))
+        et_next.setText(context.getPrefString(PreferKey.nextKeys))
         tv_ok.onClick {
-            val prevKey = et_prev.text?.toString()
-            if (prevKey.isNullOrEmpty()) {
-                context.removePref(PreferKey.prevKey)
-            } else {
-                context.putPrefInt(PreferKey.prevKey, prevKey.toInt())
-            }
-            val nextKey = et_next.text?.toString()
-            if (nextKey.isNullOrEmpty()) {
-                context.removePref(PreferKey.nextKey)
-            } else {
-                context.putPrefInt(PreferKey.nextKey, nextKey.toInt())
-            }
+            context.putPrefString(PreferKey.prevKeys, et_prev.text?.toString())
+            context.putPrefString(PreferKey.nextKeys, et_next.text?.toString())
             dismiss()
         }
     }
@@ -41,11 +30,20 @@ class PageKeyDialog(context: Context) : Dialog(context, R.style.AppTheme_AlertDi
     override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
         if (keyCode != KeyEvent.KEYCODE_BACK) {
             if (et_prev.hasFocus()) {
-                et_prev.setText(keyCode.toString())
+                val editableText = et_prev.editableText
+                if (editableText.isEmpty() or editableText.endsWith(",")) {
+                    editableText.append(keyCode.toString())
+                } else {
+                    editableText.append(",").append(keyCode.toString())
+                }
             } else if (et_next.hasFocus()) {
-                et_next.setText(keyCode.toString())
+                val editableText = et_next.editableText
+                if (editableText.isEmpty() or editableText.endsWith(",")) {
+                    editableText.append(keyCode.toString())
+                } else {
+                    editableText.append(",").append(keyCode.toString())
+                }
             }
-            return true
         }
         return super.onKeyDown(keyCode, event)
     }

app/src/main/java/io/legado/app/ui/widget/seekbar/VerticalSeekBar.kt

@@ -20,11 +20,11 @@ import java.lang.reflect.Method
 class VerticalSeekBar @JvmOverloads constructor(
     context: Context,
     attrs: AttributeSet? = null,
-    defStyle: Int = 0
+    defStyleAttr: Int = androidx.appcompat.R.attr.seekBarStyle
 ) : AppCompatSeekBar(
     context,
     attrs,
-    defStyle
+    defStyleAttr
 ) {
 
     private var mIsDragging: Boolean = false
@@ -67,7 +67,8 @@ class VerticalSeekBar @JvmOverloads constructor(
         ViewCompat.setLayoutDirection(this, ViewCompat.LAYOUT_DIRECTION_LTR)
 
         if (attrs != null) {
-            val a = context.obtainStyledAttributes(attrs, R.styleable.VerticalSeekBar, defStyle, 0)
+            val a =
+                context.obtainStyledAttributes(attrs, R.styleable.VerticalSeekBar, defStyleAttr, 0)
             val rotationAngle = a.getInteger(R.styleable.VerticalSeekBar_seekBarRotation, 0)
             if (isValidRotationAngle(rotationAngle)) {
                 mRotationAngle = rotationAngle

app/src/main/java/io/legado/app/utils/ContextExtensions.kt

@@ -56,7 +56,7 @@ fun Context.getPrefString(key: String, defValue: String? = null) =
 fun Context.getPrefString(@StringRes keyId: Int, defValue: String? = null) =
     defaultSharedPreferences.getString(getString(keyId), defValue)
 
-fun Context.putPrefString(key: String, value: String) =
+fun Context.putPrefString(key: String, value: String?) =
     defaultSharedPreferences.edit { putString(key, value) }
 
 fun Context.getPrefStringSet(