[WIP]Overscroll

example/src/main/AndroidManifest.xml

@@ -40,6 +40,9 @@
             android:theme="@style/NoActionBarAppTheme" />
         <activity android:name=".CheckCameraOrientationActivity" />
         <activity android:name=".Issue212316ParrierExampleActvity" />
+        <activity
+            android:name=".OverScrollRecyclerViewActivity"
+            android:theme="@style/AppTheme.Transparent" />
     </application>
 
 </manifest>

example/src/main/java/net/cattaka/android/snippets/example/MainActivity.java

@@ -18,6 +18,9 @@
 
 public class MainActivity extends AppCompatActivity {
     private static final List<ActivityEntry> ACTIVITY_ENTRIES = Arrays.asList(
+            new ActivityEntry("Over Scroll", null,
+                    new ActivityEntry("With RecyclerView", OverScrollRecyclerViewActivity.class)
+            ),
             new ActivityEntry("Workaround of issues", null,
                     new ActivityEntry("AOSP Issue 212316", Issue212316ParrierExampleActvity.class)
             ),

example/src/main/java/net/cattaka/android/snippets/example/OverScrollRecyclerViewActivity.java

@@ -0,0 +1,45 @@
+package net.cattaka.android.snippets.example;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+
+import net.cattaka.android.adaptertoolbox.adapter.ScrambleAdapter;
+import net.cattaka.android.snippets.example.adapter.factory.SimpleStringViewHolderFactory;
+
+import java.util.ArrayList;
+
+/**
+ * Created by cattaka on 16/12/03.
+ */
+
+public class OverScrollRecyclerViewActivity extends AppCompatActivity {
+    RecyclerView mRecyclerView;
+
+    ScrambleAdapter<String> mAdapter;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_over_scroll_recycler_view);
+
+        // Find views
+        mRecyclerView = (RecyclerView) findViewById(R.id.view_recycler);
+
+        {   // Setup mRecyclerView
+            mAdapter = new ScrambleAdapter<>(this, new ArrayList<String>(), null, new SimpleStringViewHolderFactory());
+            mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
+            mRecyclerView.setAdapter(mAdapter);
+            for (int i = 0; i < 30; i++) {
+                mAdapter.getItems().add("Item : " + mAdapter.getItems().size());
+            }
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+    }
+}

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <net.cattaka.android.snippets.view.OverScrollFrameLayout
+        android:id="@+id/layout_over_scroll"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@android:color/background_light"
+        android:orientation="vertical">
+
+        <android.support.v7.widget.RecyclerView
+            android:id="@+id/view_recycler"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+    </net.cattaka.android.snippets.view.OverScrollFrameLayout>
+</FrameLayout>

example/src/main/res/values/styles.xml

@@ -8,6 +8,12 @@
         <item name="colorAccent">@color/colorAccent</item>
     </style>
 
+    <style name="AppTheme.Transparent">
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowBackground">@android:color/transparent</item>
+    </style>
+
     <style name="NoActionBarAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
         <!-- Customize your theme here. -->
         <item name="colorPrimary">@color/colorPrimary</item>

snippets/src/main/java/net/cattaka/android/snippets/view/NestedScrollingCoordinatorLayout.java → snippets/src/main/java/net/cattaka/android/snippets/view/ClassicNestedCoordinatorLayout.java

@@ -7,25 +7,27 @@
 import android.view.View;
 
 /**
- * Created by cattaka on 2016/04/27.
+ * Created by cattaka on 2017/06/28.
+ * <p>
+ * Only for support-library below 26.0.0
  */
-public class NestedScrollingCoordinatorLayout extends CoordinatorLayout {
+public class ClassicNestedCoordinatorLayout extends CoordinatorLayout {
     private final NestedScrollingChildHelper mScrollingChildHelper;
     private final int[] mParentOffsetInWindow = new int[2];
 
-    public NestedScrollingCoordinatorLayout(Context context) {
+    public ClassicNestedCoordinatorLayout(Context context) {
         super(context);
         mScrollingChildHelper = new NestedScrollingChildHelper(this);
         mScrollingChildHelper.setNestedScrollingEnabled(true);
     }
 
-    public NestedScrollingCoordinatorLayout(Context context, AttributeSet attrs) {
+    public ClassicNestedCoordinatorLayout(Context context, AttributeSet attrs) {
         super(context, attrs);
         mScrollingChildHelper = new NestedScrollingChildHelper(this);
         mScrollingChildHelper.setNestedScrollingEnabled(true);
     }
 
-    public NestedScrollingCoordinatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+    public ClassicNestedCoordinatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
         super(context, attrs, defStyleAttr);
         mScrollingChildHelper = new NestedScrollingChildHelper(this);
         mScrollingChildHelper.setNestedScrollingEnabled(true);

snippets/src/main/java/net/cattaka/android/snippets/view/NestedCoordinatorLayout.java

@@ -0,0 +1,97 @@
+package net.cattaka.android.snippets.view;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.design.widget.CoordinatorLayout;
+import android.support.v4.view.NestedScrollingChildHelper;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * Created by cattaka on 2017/06/28.
+ * <p>
+ * Only for support-library over 26.0.0
+ */
+public class NestedCoordinatorLayout extends CoordinatorLayout {
+    private final NestedScrollingChildHelper mScrollingChildHelper;
+    private final int[] mParentOffsetInWindow = new int[2];
+
+    public NestedCoordinatorLayout(Context context) {
+        super(context);
+        mScrollingChildHelper = new NestedScrollingChildHelper(this);
+        mScrollingChildHelper.setNestedScrollingEnabled(true);
+    }
+
+    public NestedCoordinatorLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mScrollingChildHelper = new NestedScrollingChildHelper(this);
+        mScrollingChildHelper.setNestedScrollingEnabled(true);
+    }
+
+    public NestedCoordinatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        mScrollingChildHelper = new NestedScrollingChildHelper(this);
+        mScrollingChildHelper.setNestedScrollingEnabled(true);
+    }
+
+    // NestedScrollingParent
+    @Override
+    public void onNestedPreScroll(@NonNull View target, int dx, int dy, @Nullable int[] consumed, int type) {
+        if (!mScrollingChildHelper.dispatchNestedPreScroll(dx, dy, consumed, mParentOffsetInWindow, type)) {
+            super.onNestedPreScroll(target, dx, dy, consumed, type);
+        }
+    }
+
+    // NestedScrollingParent
+    @Override
+    public boolean onStartNestedScroll(@NonNull View child, @NonNull View target, int axes, int type) {
+        boolean handled = super.onStartNestedScroll(child, target, axes, type);
+        handled |= mScrollingChildHelper.startNestedScroll(axes, type);
+        return handled;
+    }
+
+    @Override
+    public void onStopNestedScroll(@NonNull View target, int type) {
+        super.onStopNestedScroll(target, type);
+        mScrollingChildHelper.stopNestedScroll();
+    }
+
+    @Override
+    public void onNestedScrollAccepted(@NonNull View child, @NonNull View target, int axes, int type) {
+        if (!mScrollingChildHelper.startNestedScroll(axes, type)) {
+            super.onNestedScrollAccepted(child, target, axes, type);
+        }
+    }
+
+    @Override
+    public void onNestedScroll(@NonNull View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
+        if (!mScrollingChildHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, mParentOffsetInWindow, type)) {
+            super.onNestedScroll(target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type);
+        }
+    }
+
+    @Override
+    public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) {
+        if (!mScrollingChildHelper.dispatchNestedPreScroll(dx, dy, consumed, mParentOffsetInWindow)) {
+            super.onNestedPreScroll(target, dx, dy, consumed);
+        }
+    }
+
+    @Override
+    public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) {
+        return mScrollingChildHelper.dispatchNestedFling(velocityX, velocityY, consumed)
+                || super.onNestedFling(target, velocityX, velocityY, consumed);
+    }
+
+    @Override
+    public boolean onNestedPreFling(View target, float velocityX, float velocityY) {
+        return mScrollingChildHelper.dispatchNestedPreFling(velocityX, velocityY)
+                || super.onNestedPreFling(target, velocityX, velocityY);
+    }
+
+    @Override
+    public int getNestedScrollAxes() {
+        return super.getNestedScrollAxes();
+    }
+}