1 /* 2 * Copyright (C) 2022 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 17 package android.media; 18 19 import android.annotation.NonNull; 20 import android.annotation.SystemApi; 21 import android.app.StatusBarManager; 22 23 import java.util.List; 24 import java.util.function.Consumer; 25 26 /** 27 * An interface that provides information about nearby devices that are able to play media. 28 * <p> 29 * External clients can implement this interface and pass it to the system via 30 * {@link StatusBarManager#registerNearbyMediaDevicesProvider} to inform the system of nearby media 31 * devices. 32 * <p> 33 * @hide 34 */ 35 @SystemApi 36 public interface NearbyMediaDevicesProvider { 37 /** 38 * Registers a callback that should be notified each time nearby media device(s) change. 39 * <p> 40 * When a callback is newly registered, it should be immediately notified of the current nearby 41 * media devices. Afterwards, the list of devices passed to the callback should always contain 42 * the full set of nearby media devices any time you get an update. If a device is no longer 43 * valid (went offline, e.g.) then it should be omitted from the list in the next update. 44 * <p> 45 * @param callback the callback that will consume updates to the nearby media devices. 46 */ registerNearbyDevicesCallback(@onNull Consumer<List<NearbyDevice>> callback)47 void registerNearbyDevicesCallback(@NonNull Consumer<List<NearbyDevice>> callback); 48 49 /** 50 * Unregisters a callback. @see #registerNearbyDevicesCallback. 51 * <p> 52 * @param callback the callback to unregister. 53 */ unregisterNearbyDevicesCallback(@onNull Consumer<List<NearbyDevice>> callback)54 void unregisterNearbyDevicesCallback(@NonNull Consumer<List<NearbyDevice>> callback); 55 } 56