| /* |
| * Copyright (C) 2017 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 androidx.vectordrawable.graphics.drawable; |
| |
| import static android.os.Build.VERSION_CODES.M; |
| |
| import android.graphics.drawable.Animatable; |
| import android.graphics.drawable.Animatable2; |
| import android.graphics.drawable.Drawable; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.RequiresApi; |
| |
| /** |
| * Interface that drawables supporting animations and callbacks should extend in support lib. |
| */ |
| public interface Animatable2Compat 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(); |
| |
| /** |
| * Abstract class for animation callback. Used to notify animation events. |
| */ |
| 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) {}; |
| |
| // Only when passing this Animatable2Compat.AnimationCallback to a frameworks' AVD, we need |
| // to bridge this compat version callback with the frameworks' callback. |
| Animatable2.AnimationCallback mPlatformCallback; |
| |
| @RequiresApi(M) |
| Animatable2.AnimationCallback getPlatformCallback() { |
| if (mPlatformCallback == null) { |
| mPlatformCallback = new Animatable2.AnimationCallback() { |
| @Override |
| public void onAnimationStart(Drawable drawable) { |
| AnimationCallback.this.onAnimationStart(drawable); |
| } |
| |
| @Override |
| public void onAnimationEnd(Drawable drawable) { |
| AnimationCallback.this.onAnimationEnd(drawable); |
| } |
| }; |
| } |
| return mPlatformCallback; |
| } |
| } |
| } |