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 17package android.support.v4.media; 18 19import android.media.browse.MediaBrowser; 20import android.os.Bundle; 21import android.support.annotation.NonNull; 22 23import java.util.List; 24 25class MediaBrowserCompatApi24 { 26 public static Object createSubscriptionCallback(SubscriptionCallback callback) { 27 return new SubscriptionCallbackProxy<>(callback); 28 } 29 30 public static void subscribe(Object browserObj, String parentId, Bundle options, 31 Object subscriptionCallbackObj) { 32 ((MediaBrowser) browserObj).subscribe(parentId, options, 33 (MediaBrowser.SubscriptionCallback) subscriptionCallbackObj); 34 } 35 36 public static void unsubscribe(Object browserObj, String parentId, 37 Object subscriptionCallbackObj) { 38 ((MediaBrowser) browserObj).unsubscribe(parentId, 39 (MediaBrowser.SubscriptionCallback) subscriptionCallbackObj); 40 } 41 42 interface SubscriptionCallback extends MediaBrowserCompatApi21.SubscriptionCallback { 43 void onChildrenLoaded(@NonNull String parentId, List<?> children, @NonNull Bundle options); 44 void onError(@NonNull String parentId, @NonNull Bundle options); 45 } 46 47 static class SubscriptionCallbackProxy<T extends SubscriptionCallback> 48 extends MediaBrowserCompatApi21.SubscriptionCallbackProxy<T> { 49 public SubscriptionCallbackProxy(T callback) { 50 super(callback); 51 } 52 53 @Override 54 public void onChildrenLoaded(@NonNull String parentId, 55 List<MediaBrowser.MediaItem> children, @NonNull Bundle options) { 56 mSubscriptionCallback.onChildrenLoaded(parentId, children, options); 57 } 58 59 @Override 60 public void onError(@NonNull String parentId, @NonNull Bundle options) { 61 mSubscriptionCallback.onError(parentId, options); 62 } 63 } 64} 65