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/*
* Copyright (C) 2015 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 android.graphics.drawable;
import android.annotation.NonNull;
/**
* Abstract class that drawables supporting animations and callbacks should extend.
*/
public interface Animatable2 extends Animatable {
/**
* Adds a callback to listen to the animation events.
*
* @param callback Callback to add.
*/
void registerAnimationCallback(@NonNull AnimationCallback callback);
/**
* Removes the specified animation callback.
*
* @param callback Callback to remove.
* @return {@code false} if callback didn't exist in the call back list, or {@code true} if
* callback has been removed successfully.
*/
boolean unregisterAnimationCallback(@NonNull AnimationCallback callback);
/**
* Removes all existing animation callbacks.
*/
void clearAnimationCallbacks();
public static abstract class AnimationCallback {
/**
* Called when the animation starts.
*
* @param drawable The drawable started the animation.
*/
public void onAnimationStart(Drawable drawable) {};
/**
* Called when the animation ends.
*
* @param drawable The drawable finished the animation.
*/
public void onAnimationEnd(Drawable drawable) {};
}
}
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