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.content.Context; 20import android.media.browse.MediaBrowser; 21import android.os.Bundle; 22import android.os.Parcel; 23import android.service.media.MediaBrowserService; 24import android.util.Log; 25 26import java.lang.reflect.Field; 27import java.util.ArrayList; 28import java.util.List; 29 30class MediaBrowserServiceCompatApi24 { 31 private static final String TAG = "MBSCompatApi24"; 32 33 private static Field sResultFlags; 34 static { 35 try { 36 sResultFlags = MediaBrowserService.Result.class.getDeclaredField("mFlags"); 37 sResultFlags.setAccessible(true); 38 } catch (NoSuchFieldException e) { 39 Log.w(TAG, e); 40 } 41 } 42 43 public static Object createService(Context context, ServiceCompatProxy serviceProxy) { 44 return new MediaBrowserServiceAdaptor(context, serviceProxy); 45 } 46 47 public static void notifyChildrenChanged(Object serviceObj, String parentId, Bundle options) { 48 ((MediaBrowserService) serviceObj).notifyChildrenChanged(parentId, options); 49 } 50 51 public static Bundle getBrowserRootHints(Object serviceObj) { 52 return ((MediaBrowserService) serviceObj).getBrowserRootHints(); 53 } 54 55 public interface ServiceCompatProxy extends MediaBrowserServiceCompatApi23.ServiceCompatProxy { 56 void onLoadChildren(String parentId, ResultWrapper result, Bundle options); 57 } 58 59 static class ResultWrapper { 60 MediaBrowserService.Result mResultObj; 61 62 ResultWrapper(MediaBrowserService.Result result) { 63 mResultObj = result; 64 } 65 66 public void sendResult(List<Parcel> result, int flags) { 67 try { 68 sResultFlags.setInt(mResultObj, flags); 69 } catch (IllegalAccessException e) { 70 Log.w(TAG, e); 71 } 72 mResultObj.sendResult(parcelListToItemList(result)); 73 } 74 75 public void detach() { 76 mResultObj.detach(); 77 } 78 79 List<MediaBrowser.MediaItem> parcelListToItemList(List<Parcel> parcelList) { 80 if (parcelList == null) { 81 return null; 82 } 83 List<MediaBrowser.MediaItem> items = new ArrayList<>(); 84 for (Parcel parcel : parcelList) { 85 parcel.setDataPosition(0); 86 items.add(MediaBrowser.MediaItem.CREATOR.createFromParcel(parcel)); 87 parcel.recycle(); 88 } 89 return items; 90 } 91 } 92 93 static class MediaBrowserServiceAdaptor extends 94 MediaBrowserServiceCompatApi23.MediaBrowserServiceAdaptor { 95 MediaBrowserServiceAdaptor(Context context, ServiceCompatProxy serviceWrapper) { 96 super(context, serviceWrapper); 97 } 98 99 @Override 100 public void onLoadChildren(String parentId, Result<List<MediaBrowser.MediaItem>> result, 101 Bundle options) { 102 ((ServiceCompatProxy) mServiceProxy).onLoadChildren( 103 parentId, new ResultWrapper(result), options); 104 } 105 } 106} 107