Reduce overdraws

Author: h6ah4i

example/src/main/java/com/h6ah4i/android/example/advrecyclerview/demo_s_button/SwipeableWithButtonExampleAdapter.java

@@ -23,6 +23,7 @@
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.FrameLayout;
+import android.widget.RelativeLayout;
 import android.widget.TextView;
 
 import com.h6ah4i.android.example.advrecyclerview.R;
@@ -60,12 +61,14 @@ public interface EventListener {
 
     public static class MyViewHolder extends AbstractSwipeableItemViewHolder {
         public FrameLayout mContainer;
+        public RelativeLayout mBehindViews;
         public TextView mTextView;
         public Button mButton;
 
         public MyViewHolder(View v) {
             super(v);
             mContainer = (FrameLayout) v.findViewById(R.id.container);
+            mBehindViews = (RelativeLayout) v.findViewById(R.id.behind_views);
             mTextView = (TextView) v.findViewById(android.R.id.text1);
             mButton = (Button) v.findViewById(android.R.id.button1);
         }
@@ -188,6 +191,11 @@ public int onGetSwipeReactionType(MyViewHolder holder, int position, int x, int
 
     @Override
     public void onSetSwipeBackground(MyViewHolder holder, int position, int type) {
+        if (type == Swipeable.DRAWABLE_SWIPE_NEUTRAL_BACKGROUND) {
+            holder.mBehindViews.setVisibility(View.GONE);
+        } else {
+            holder.mBehindViews.setVisibility(View.VISIBLE);
+        }
     }
 
     @Override

example/src/main/java/com/h6ah4i/android/example/advrecyclerview/demo_s_viewpager/ViewPagerSwipeableExampleAdapter.java

@@ -16,6 +16,8 @@
 
 package com.h6ah4i.android.example.advrecyclerview.demo_s_viewpager;
 
+import android.graphics.Color;
+import android.support.v4.content.ContextCompat;
 import android.support.v4.view.ViewCompat;
 import android.support.v7.widget.RecyclerView;
 import android.util.Log;
@@ -130,6 +132,11 @@ public int onGetSwipeReactionType(MyViewHolder holder, int position, int x, int
 
     @Override
     public void onSetSwipeBackground(MyViewHolder holder, int position, int type) {
+        if (type == Swipeable.DRAWABLE_SWIPE_NEUTRAL_BACKGROUND) {
+            holder.itemView.setBackgroundColor(Color.TRANSPARENT);
+        } else {
+            holder.itemView.setBackgroundColor(ContextCompat.getColor(holder.itemView.getContext(), R.color.bg_swipe_item_gray));
+        }
     }
 
     @Override

example/src/main/res/layout/list_item_view_pager.xml

@@ -20,14 +20,13 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="@dimen/list_item_height"
-    android:background="@color/bg_swipe_item_gray">
+    android:layout_height="@dimen/list_item_height">
 
     <com.h6ah4i.android.example.advrecyclerview.demo_s_viewpager.PagerSwipeItemFrameLayout
         android:id="@+id/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="#ffffff"
+        android:background="@color/bg_item_normal_state"
         android:clickable="true"
         android:foreground="?attr/selectableItemBackground">
 

example/src/main/res/layout/list_item_with_leave_behind_button.xml

@@ -20,13 +20,15 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="64dp"
-    android:background="@drawable/bg_swipe_item_neutral">
+    android:layout_height="64dp">
 
     <RelativeLayout
+        android:id="@+id/behind_views"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="#888888">
+        android:background="@color/bg_swipe_item_gray"
+        android:visibility="gone"
+        tools:visibility="visible">
 
         <Button
             android:id="@android:id/button1"
@@ -45,7 +47,7 @@
         android:id="@+id/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="#ffffff"
+        android:background="@color/bg_item_normal_state"
         android:clickable="true"
         android:foreground="?attr/selectableItemBackground"
         tools:visibility="invisible">