| /* |
| * 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) {}; |
| } |
| } |