优化

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

@@ -5,6 +5,7 @@ import android.view.KeyEvent
 import android.view.MenuItem
 import androidx.activity.viewModels
 import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.adapter.FragmentStateAdapter
 import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.bottomnavigation.BottomNavigationView
@@ -30,6 +31,7 @@ import io.legado.app.ui.main.rss.RssFragment
 import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.observeEvent
 import io.legado.app.utils.toastOnUi
+import java.lang.reflect.Field
 
 
 class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
@@ -46,7 +48,8 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
         return ActivityMainBinding.inflate(layoutInflater)
     }
 
-    override fun onActivityCreated(savedInstanceState: Bundle?) = with(binding) {
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        binding.apply {
             ATH.applyEdgeEffectColor(viewPagerMain)
             ATH.applyBottomNavigationColor(bottomNavigationView)
             viewPagerMain.offscreenPageLimit = 3
@@ -70,6 +73,8 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
             bottomNavigationView.setOnNavigationItemReselectedListener(this@MainActivity)
             bottomNavigationView.menu.findItem(R.id.menu_rss).isVisible = AppConfig.isShowRSS
         }
+        resetViewPager2TouchSlop()
+    }
 
     override fun onPostCreate(savedInstanceState: Bundle?) {
         super.onPostCreate(savedInstanceState)
@@ -85,6 +90,22 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
         }, 3000)
     }
 
+    /**
+     * 重新设置viewpager2的滑动灵敏度
+     */
+    private fun resetViewPager2TouchSlop() = kotlin.runCatching {
+        val recyclerViewField: Field = ViewPager2::class.java.getDeclaredField("mRecyclerView")
+        recyclerViewField.isAccessible = true
+
+        val recyclerView = recyclerViewField.get(binding.viewPagerMain) as RecyclerView
+
+        val touchSlopField: Field = RecyclerView::class.java.getDeclaredField("mTouchSlop")
+        touchSlopField.isAccessible = true
+
+        val touchSlop = touchSlopField.get(recyclerView) as Int
+        touchSlopField.set(recyclerView, touchSlop * 4)
+    }
+
     override fun onNavigationItemSelected(item: MenuItem): Boolean = with(binding) {
         when (item.itemId) {
             R.id.menu_bookshelf -> viewPagerMain.setCurrentItem(0, false)

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

@@ -10,7 +10,9 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.LiveData
+import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.tabs.TabLayout
 import com.google.android.material.tabs.TabLayoutMediator
 import io.legado.app.R
@@ -36,6 +38,7 @@ import io.legado.app.ui.main.MainViewModel
 import io.legado.app.ui.main.bookshelf.books.BooksFragment
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
+import java.lang.reflect.Field
 
 /**
  * 书架界面
@@ -63,6 +66,23 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         setSupportToolbar(binding.titleBar.toolbar)
         initView()
         initBookGroupData()
+        resetViewPager2TouchSlop()
+    }
+
+    /**
+     * 重新设置viewpager2的滑动灵敏度
+     */
+    private fun resetViewPager2TouchSlop() = kotlin.runCatching {
+        val recyclerViewField: Field = ViewPager2::class.java.getDeclaredField("mRecyclerView")
+        recyclerViewField.isAccessible = true
+
+        val recyclerView = recyclerViewField.get(binding.viewPagerBookshelf) as RecyclerView
+
+        val touchSlopField: Field = RecyclerView::class.java.getDeclaredField("mTouchSlop")
+        touchSlopField.isAccessible = true
+
+        val touchSlop = touchSlopField.get(recyclerView) as Int
+        touchSlopField.set(recyclerView, touchSlop * 4)
     }
 
     override fun onCompatCreateOptionsMenu(menu: Menu) {

app/src/main/java/io/legado/app/ui/widget/recycler/RecyclerViewAtViewPager2.kt

@@ -1,41 +0,0 @@
-package io.legado.app.ui.widget.recycler
-
-import android.content.Context
-import android.util.AttributeSet
-import android.view.MotionEvent
-import androidx.recyclerview.widget.RecyclerView
-import kotlin.math.abs
-
-class RecyclerViewAtViewPager2(context: Context, attrs: AttributeSet?) :
-    RecyclerView(context, attrs) {
-
-    private var startX: Int = 0
-    private var startY: Int = 0
-
-    override fun dispatchTouchEvent(ev: MotionEvent): Boolean {
-        when (ev.action) {
-            MotionEvent.ACTION_DOWN -> {
-                startX = ev.x.toInt()
-                startY = ev.y.toInt()
-                parent.requestDisallowInterceptTouchEvent(true)
-            }
-            MotionEvent.ACTION_MOVE -> {
-                val endX = ev.x.toInt()
-                val endY = ev.y.toInt()
-                val disX = abs(endX - startX)
-                val disY = abs(endY - startY)
-                if (disX > disY) {
-                    parent.requestDisallowInterceptTouchEvent(canScrollHorizontally(startX - endX))
-                } else {
-                    parent.requestDisallowInterceptTouchEvent(canScrollVertically(startY - endY))
-                }
-            }
-            MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> parent.requestDisallowInterceptTouchEvent(
-                false
-            )
-        }
-        return super.dispatchTouchEvent(ev)
-    }
-
-
-}