Inflate dismissal background instead of drawing while swiping

- Only swipe the foreground out to have the background revealed.
- Inflate dismissal_swipe_background.xml while swiping.
- Fix the fly-in transition.
- Fix the overlapping problem.

Bug: 129742618
Test: robotests
Change-Id: I5311e50332d0ea0437d1693d075d5c3a2176a443

res/layout/dismissal_swipe_background.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2019 The Android Open Source Project
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+  -->
+
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/dismissal_swipe_background"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/homepage_card_dismissal_background">
+
+    <ImageView
+        android:id="@+id/dismissal_icon_start"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/ic_delete"
+        android:layout_gravity="start|center_vertical"
+        android:layout_marginStart="@dimen/homepage_card_dismissal_side_margin"/>
+
+    <Space
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+
+    <ImageView
+        android:id="@+id/dismissal_icon_end"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/ic_delete"
+        android:layout_gravity="end|center_vertical"
+        android:layout_marginEnd="@dimen/homepage_card_dismissal_side_margin"/>
+
+</LinearLayout>

res/layout/homepage_slice_half_tile.xml

@@ -21,6 +21,12 @@
     android:layout_height="wrap_content"
     style="@style/ContextualCardStyle">
 
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <include layout="@layout/dismissal_swipe_background"/>
+
         <ViewFlipper
             android:id="@+id/view_flipper"
             android:layout_width="match_parent"
@@ -33,6 +39,7 @@
                 android:paddingEnd="@dimen/homepage_card_padding_end"
                 android:paddingTop="@dimen/homepage_half_card_padding_top"
                 android:paddingBottom="@dimen/homepage_half_card_padding_bottom"
+                android:background="@color/contextual_card_background"
                 android:orientation="vertical">
 
                 <ImageView
@@ -58,4 +65,5 @@
             <include layout="@layout/homepage_dismissal_view"/>
 
         </ViewFlipper>
+    </FrameLayout>
 </com.google.android.material.card.MaterialCardView>

res/layout/homepage_slice_tile.xml

@@ -21,11 +21,23 @@
     android:layout_height="wrap_content"
     style="@style/ContextualCardStyle">
 
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <include layout="@layout/dismissal_swipe_background"/>
+
         <ViewFlipper
             android:id="@+id/view_flipper"
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
 
+            <LinearLayout
+                android:id="@+id/slice_view_wrapper"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@color/contextual_card_background">
+
                 <androidx.slice.widget.SliceView
                     android:id="@+id/slice_view"
                     android:layout_width="match_parent"
@@ -33,9 +45,11 @@
                     android:layout_gravity="center_vertical"
                     android:importantForAccessibility="no"
                     style="@style/SliceViewStyle"/>
+            </LinearLayout>
 
             <!--dismissal view-->
             <include layout="@layout/homepage_dismissal_view"/>
 
         </ViewFlipper>
+    </FrameLayout>
 </com.google.android.material.card.MaterialCardView>

res/values/styles.xml

@@ -492,6 +492,7 @@
         <item name="android:paddingEnd">8dp</item>
 
         <item name="rowStyle">@style/SliceRowStyle</item>
+        <item name="android:background">@color/contextual_card_background</item>
     </style>
 
     <style name="SliceRowStyle">

src/com/android/settings/homepage/contextualcards/slices/SliceFullCardRendererHelper.java

@@ -18,6 +18,7 @@ package com.android.settings.homepage.contextualcards.slices;
 
 import android.content.Context;
 import android.view.View;
+import android.widget.LinearLayout;
 
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.slice.Slice;
@@ -70,10 +71,12 @@ class SliceFullCardRendererHelper {
 
     static class SliceViewHolder extends RecyclerView.ViewHolder {
         public final SliceView sliceView;
+        public final LinearLayout sliceViewWrapper;
 
         public SliceViewHolder(View view) {
             super(view);
             sliceView = view.findViewById(R.id.slice_view);
+            sliceViewWrapper = view.findViewById(R.id.slice_view_wrapper);
         }
     }
 }

src/com/android/settings/homepage/contextualcards/slices/SwipeDismissalDelegate.java

@@ -18,9 +18,6 @@ package com.android.settings.homepage.contextualcards.slices;
 
 import android.content.Context;
 import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.graphics.RectF;
-import android.graphics.drawable.Drawable;
 import android.view.View;
 import android.widget.ViewFlipper;
 
@@ -41,18 +38,10 @@ public class SwipeDismissalDelegate extends ItemTouchHelper.Callback {
 
     private final Context mContext;
     private final SwipeDismissalDelegate.Listener mListener;
-    private final Drawable mIconDelete;
-    private final Paint mBgPaint;
-    private final int mBgCornerRadius;
 
     public SwipeDismissalDelegate(Context context, SwipeDismissalDelegate.Listener listener) {
         mContext = context;
         mListener = listener;
-        mIconDelete = mContext.getDrawable(R.drawable.ic_delete);
-        mBgPaint = new Paint();
-        mBgPaint.setColor(mContext.getColor(R.color.homepage_card_dismissal_background));
-        mBgCornerRadius = mContext.getResources()
-                .getDimensionPixelSize(R.dimen.homepage_card_corner_radius);
     }
 
     /**
@@ -100,41 +89,49 @@ public class SwipeDismissalDelegate extends ItemTouchHelper.Callback {
         mListener.onSwiped(viewHolder.getAdapterPosition());
     }
 
+    @Override
+    public void clearView(@NonNull RecyclerView recyclerView,
+            @NonNull RecyclerView.ViewHolder viewHolder) {
+        final View view = getSwipeableView(viewHolder);
+        getDefaultUIUtil().clearView(view);
+    }
+
     @Override
     public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView,
             @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState,
             boolean isCurrentlyActive) {
-        super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+        final View view = getSwipeableView(viewHolder);
+        final View iconStart = viewHolder.itemView.findViewById(R.id.dismissal_icon_start);
+        final View iconEnd = viewHolder.itemView.findViewById(R.id.dismissal_icon_end);
 
-        final View itemView = viewHolder.itemView;
+        if (dX > 0) {
-        final int iconMargin = mContext.getResources()
+            iconStart.setVisibility(View.VISIBLE);
-                .getDimensionPixelSize(R.dimen.homepage_card_dismissal_side_margin);
+            iconEnd.setVisibility(View.GONE);
-        final int iconTop =
-                itemView.getTop() + (itemView.getHeight() - mIconDelete.getIntrinsicHeight()) / 2;
-        final int iconBottom = iconTop + mIconDelete.getIntrinsicHeight();
-
-        if (dX > 0) { //swipe to the right
-            final int iconLeft = itemView.getLeft() + iconMargin;
-            final int iconRight = iconLeft + mIconDelete.getIntrinsicWidth();
-            final RectF rect = new RectF(itemView.getLeft(), itemView.getTop(),
-                    itemView.getLeft() + ((int) dX) + mBgCornerRadius, itemView.getBottom());
-            mIconDelete.setBounds(iconLeft, iconTop, iconRight, iconBottom);
-            c.drawRoundRect(rect, mBgCornerRadius, mBgCornerRadius, mBgPaint);
         } else if (dX < 0) {
-            final int iconRight = itemView.getRight() - iconMargin;
+            iconStart.setVisibility(View.GONE);
-            final int iconLeft = iconRight - mIconDelete.getIntrinsicWidth();
+            iconEnd.setVisibility(View.VISIBLE);
-            final RectF rect = new RectF(itemView.getRight() + ((int) dX), itemView.getTop(),
-                    itemView.getRight(), itemView.getBottom());
-            mIconDelete.setBounds(iconLeft, iconTop, iconRight, iconBottom);
-            c.drawRoundRect(rect, mBgCornerRadius, mBgCornerRadius, mBgPaint);
         }
-        mIconDelete.draw(c);
+        getDefaultUIUtil().onDraw(c, recyclerView, view, dX, dY, actionState, isCurrentlyActive);
     }
 
     private int getInitialViewId(RecyclerView.ViewHolder viewHolder) {
         if (viewHolder.getItemViewType() == SliceContextualCardRenderer.VIEW_TYPE_HALF_WIDTH) {
             return R.id.content;
         }
-        return R.id.slice_view;
+        return R.id.slice_view_wrapper;
+    }
+
+    /**
+     * Get the foreground view from the {@link android.widget.FrameLayout} as we only swipe
+     * the foreground out in {@link SwipeDismissalDelegate#onChildDraw} and gets the view
+     * beneath revealed.
+     *
+     * @return The foreground view.
+     */
+    private View getSwipeableView(RecyclerView.ViewHolder viewHolder) {
+        if (viewHolder.getItemViewType() == SliceContextualCardRenderer.VIEW_TYPE_HALF_WIDTH) {
+            return ((SliceHalfCardRendererHelper.HalfCardViewHolder) viewHolder).content;
+        }
+        return ((SliceFullCardRendererHelper.SliceViewHolder) viewHolder).sliceViewWrapper;
     }
 }

tests/robotests/src/com/android/settings/homepage/contextualcards/slices/SliceContextualCardRendererTest.java

@@ -149,7 +149,7 @@ public class SliceContextualCardRendererTest {
 
         btnKeep.performClick();
 
-        assertThat(viewFlipper.getCurrentView()).isInstanceOf(SliceView.class);
+        assertThat(viewFlipper.getCurrentView().getId()).isEqualTo(R.id.slice_view_wrapper);
     }
 
     @Test
@@ -204,7 +204,7 @@ public class SliceContextualCardRendererTest {
 
         mRenderer.onStop();
 
-        assertThat(viewFlipper.getCurrentView()).isInstanceOf(SliceView.class);
+        assertThat(viewFlipper.getCurrentView().getId()).isEqualTo(R.id.slice_view_wrapper);
     }
 
     private RecyclerView.ViewHolder getSliceViewHolder() {

tests/robotests/src/com/android/settings/homepage/contextualcards/slices/SwipeDismissalDelegateTest.java

@@ -99,9 +99,9 @@ public class SwipeDismissalDelegateTest {
         final RecyclerView.ViewHolder holder = getSliceViewHolder();
         final ViewFlipper viewFlipper = holder.itemView.findViewById(R.id.view_flipper);
         viewFlipper.setDisplayedChild(0);
-        final View sliceView = holder.itemView.findViewById(R.id.slice_view);
+        final View sliceViewWrapper = holder.itemView.findViewById(R.id.slice_view_wrapper);
 
-        assertThat(viewFlipper.getCurrentView()).isEqualTo(sliceView);
+        assertThat(viewFlipper.getCurrentView()).isEqualTo(sliceViewWrapper);
         assertThat(mDismissalDelegate.getMovementFlags(mRecyclerView, getSliceViewHolder()))
                 .isNotEqualTo(0);
     }