1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3.anim; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorListenerAdapter; 21 import android.util.ArrayMap; 22 import android.view.View; 23 import java.util.Iterator; 24 import java.util.Map; 25 26 /** 27 * Helper class to automatically build view hardware layers for the duration of an animation. 28 */ 29 public class AnimationLayerSet extends AnimatorListenerAdapter { 30 31 private final ArrayMap<View, Integer> mViewsToLayerTypeMap; 32 AnimationLayerSet()33 public AnimationLayerSet() { 34 mViewsToLayerTypeMap = new ArrayMap<>(); 35 } 36 AnimationLayerSet(View v)37 public AnimationLayerSet(View v) { 38 mViewsToLayerTypeMap = new ArrayMap<>(1); 39 addView(v); 40 } 41 addView(View v)42 public void addView(View v) { 43 mViewsToLayerTypeMap.put(v, v.getLayerType()); 44 } 45 46 @Override onAnimationStart(Animator animation)47 public void onAnimationStart(Animator animation) { 48 // Enable all necessary layers 49 Iterator<Map.Entry<View, Integer>> itr = mViewsToLayerTypeMap.entrySet().iterator(); 50 while (itr.hasNext()) { 51 Map.Entry<View, Integer> entry = itr.next(); 52 View v = entry.getKey(); 53 entry.setValue(v.getLayerType()); 54 v.setLayerType(View.LAYER_TYPE_HARDWARE, null); 55 if (v.isAttachedToWindow() && v.getVisibility() == View.VISIBLE) { 56 v.buildLayer(); 57 } 58 } 59 } 60 61 @Override onAnimationEnd(Animator animation)62 public void onAnimationEnd(Animator animation) { 63 Iterator<Map.Entry<View, Integer>> itr = mViewsToLayerTypeMap.entrySet().iterator(); 64 while (itr.hasNext()) { 65 Map.Entry<View, Integer> entry = itr.next(); 66 entry.getKey().setLayerType(entry.getValue(), null); 67 } 68 } 69 } 70