From 8c957d586170caba6fd6d3c718955130242ea03c Mon Sep 17 00:00:00 2001
From: kunfei <gekunfei@live.com>
Date: Tue, 15 Oct 2019 14:09:20 +0800
Subject: [PATCH] up

---
 .../recycler/RecyclerViewAtViewPager2.kt      | 41 +++++++++++++++++++
 app/src/main/res/layout/fragment_books.xml    |  2 +-
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/io/legado/app/ui/widget/recycler/RecyclerViewAtViewPager2.kt

diff --git a/app/src/main/java/io/legado/app/ui/widget/recycler/RecyclerViewAtViewPager2.kt b/app/src/main/java/io/legado/app/ui/widget/recycler/RecyclerViewAtViewPager2.kt
new file mode 100644
index 000000000..79132f627
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/widget/recycler/RecyclerViewAtViewPager2.kt
@@ -0,0 +1,41 @@
+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)
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_books.xml b/app/src/main/res/layout/fragment_books.xml
index 30f8ce74c..3eb83f71d 100644
--- a/app/src/main/res/layout/fragment_books.xml
+++ b/app/src/main/res/layout/fragment_books.xml
@@ -4,7 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <io.legado.app.ui.widget.recycler.RecyclerViewAtViewPager2
         android:id="@+id/rv_bookshelf"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />