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/*
* Copyright (C) 2016 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.
*/
package com.android.launcher3.anim;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.util.ArrayMap;
import android.view.View;
import java.util.Iterator;
import java.util.Map;
/**
* Helper class to automatically build view hardware layers for the duration of an animation.
*/
public class AnimationLayerSet extends AnimatorListenerAdapter {
private final ArrayMap<View, Integer> mViewsToLayerTypeMap;
public AnimationLayerSet() {
mViewsToLayerTypeMap = new ArrayMap<>();
}
public AnimationLayerSet(View v) {
mViewsToLayerTypeMap = new ArrayMap<>(1);
addView(v);
}
public void addView(View v) {
mViewsToLayerTypeMap.put(v, v.getLayerType());
}
@Override
public void onAnimationStart(Animator animation) {
// Enable all necessary layers
Iterator<Map.Entry<View, Integer>> itr = mViewsToLayerTypeMap.entrySet().iterator();
while (itr.hasNext()) {
Map.Entry<View, Integer> entry = itr.next();
View v = entry.getKey();
entry.setValue(v.getLayerType());
v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
if (v.isAttachedToWindow() && v.getVisibility() == View.VISIBLE) {
v.buildLayer();
}
}
}
@Override
public void onAnimationEnd(Animator animation) {
Iterator<Map.Entry<View, Integer>> itr = mViewsToLayerTypeMap.entrySet().iterator();
while (itr.hasNext()) {
Map.Entry<View, Integer> entry = itr.next();
entry.getKey().setLayerType(entry.getValue(), null);
}
}
}
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