1/* 2 * Copyright 2018 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.Parcel; 21 22import androidx.annotation.NonNull; 23import androidx.annotation.RequiresApi; 24 25@RequiresApi(23) 26class MediaBrowserCompatApi23 { 27 28 public static Object createItemCallback(ItemCallback callback) { 29 return new ItemCallbackProxy<>(callback); 30 } 31 32 public static void getItem(Object browserObj, String mediaId, Object itemCallbackObj) { 33 ((MediaBrowser) browserObj).getItem(mediaId, ((MediaBrowser.ItemCallback) itemCallbackObj)); 34 } 35 36 interface ItemCallback { 37 void onItemLoaded(Parcel itemParcel); 38 void onError(@NonNull String itemId); 39 } 40 41 static class ItemCallbackProxy<T extends ItemCallback> extends MediaBrowser.ItemCallback { 42 protected final T mItemCallback; 43 44 public ItemCallbackProxy(T callback) { 45 mItemCallback = callback; 46 } 47 48 @Override 49 public void onItemLoaded(MediaBrowser.MediaItem item) { 50 if (item == null) { 51 mItemCallback.onItemLoaded(null); 52 } else { 53 Parcel parcel = Parcel.obtain(); 54 item.writeToParcel(parcel, 0); 55 mItemCallback.onItemLoaded(parcel); 56 } 57 } 58 59 @Override 60 public void onError(@NonNull String itemId) { 61 mItemCallback.onError(itemId); 62 } 63 } 64 65 private MediaBrowserCompatApi23() { 66 } 67} 68