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 androidx.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 androidx.annotation.RequiresApi; 27 28import java.lang.reflect.Field; 29import java.util.ArrayList; 30import java.util.List; 31 32@RequiresApi(26) 33class MediaBrowserServiceCompatApi26 { 34 private static final String TAG = "MBSCompatApi26"; 35 36 private static Field sResultFlags; 37 static { 38 try { 39 sResultFlags = MediaBrowserService.Result.class.getDeclaredField("mFlags"); 40 sResultFlags.setAccessible(true); 41 } catch (NoSuchFieldException e) { 42 Log.w(TAG, e); 43 } 44 } 45 46 public static Object createService(Context context, ServiceCompatProxy serviceProxy) { 47 return new MediaBrowserServiceAdaptor(context, serviceProxy); 48 } 49 50 public static void notifyChildrenChanged(Object serviceObj, String parentId, Bundle options) { 51 ((MediaBrowserService) serviceObj).notifyChildrenChanged(parentId, options); 52 } 53 54 public static Bundle getBrowserRootHints(Object serviceObj) { 55 return ((MediaBrowserService) serviceObj).getBrowserRootHints(); 56 } 57 58 public interface ServiceCompatProxy extends MediaBrowserServiceCompatApi23.ServiceCompatProxy { 59 void onLoadChildren(String parentId, ResultWrapper result, Bundle options); 60 } 61 62 static class ResultWrapper { 63 MediaBrowserService.Result mResultObj; 64 65 ResultWrapper(MediaBrowserService.Result result) { 66 mResultObj = result; 67 } 68 69 public void sendResult(List<Parcel> result, int flags) { 70 try { 71 sResultFlags.setInt(mResultObj, flags); 72 } catch (IllegalAccessException e) { 73 Log.w(TAG, e); 74 } 75 mResultObj.sendResult(parcelListToItemList(result)); 76 } 77 78 public void detach() { 79 mResultObj.detach(); 80 } 81 82 List<MediaBrowser.MediaItem> parcelListToItemList(List<Parcel> parcelList) { 83 if (parcelList == null) { 84 return null; 85 } 86 List<MediaBrowser.MediaItem> items = new ArrayList<>(); 87 for (Parcel parcel : parcelList) { 88 parcel.setDataPosition(0); 89 items.add(MediaBrowser.MediaItem.CREATOR.createFromParcel(parcel)); 90 parcel.recycle(); 91 } 92 return items; 93 } 94 } 95 96 static class MediaBrowserServiceAdaptor extends 97 MediaBrowserServiceCompatApi23.MediaBrowserServiceAdaptor { 98 MediaBrowserServiceAdaptor(Context context, ServiceCompatProxy serviceWrapper) { 99 super(context, serviceWrapper); 100 } 101 102 @Override 103 public void onLoadChildren(String parentId, Result<List<MediaBrowser.MediaItem>> result, 104 Bundle options) { 105 ((ServiceCompatProxy) mServiceProxy).onLoadChildren( 106 parentId, new ResultWrapper(result), options); 107 } 108 } 109 110 private MediaBrowserServiceCompatApi26() { 111 } 112} 113