| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package android.car.media; |
| |
| import android.annotation.RequiresPermission; |
| import android.car.Car; |
| import android.car.CarManagerBase; |
| import android.content.ComponentName; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * API for updating and receiving updates to the primary media source in the car. |
| * @hide |
| */ |
| public final class CarMediaManager extends CarManagerBase { |
| |
| private final ICarMedia mService; |
| private Map<MediaSourceChangedListener, ICarMediaSourceListener> mCallbackMap = new HashMap(); |
| |
| /** |
| * Get an instance of the CarPowerManager. |
| * |
| * Should not be obtained directly by clients, use {@link Car#getCarManager(String)} instead. |
| * @hide |
| */ |
| public CarMediaManager(Car car, IBinder service) { |
| super(car); |
| mService = ICarMedia.Stub.asInterface(service); |
| } |
| |
| /** |
| * Listener for updates to the primary media source |
| * @hide |
| */ |
| public interface MediaSourceChangedListener { |
| |
| /** |
| * Called when the primary media source is changed |
| * @hide |
| */ |
| void onMediaSourceChanged(ComponentName componentName); |
| } |
| |
| /** |
| * Gets the currently active media source, or null if none exists |
| * Requires android.Manifest.permission.MEDIA_CONTENT_CONTROL permission |
| * @hide |
| */ |
| @RequiresPermission(value = android.Manifest.permission.MEDIA_CONTENT_CONTROL) |
| public synchronized ComponentName getMediaSource() { |
| try { |
| return mService.getMediaSource(); |
| } catch (RemoteException e) { |
| return handleRemoteExceptionFromCarService(e, null); |
| } |
| } |
| |
| /** |
| * Sets the currently active media source |
| * Requires android.Manifest.permission.MEDIA_CONTENT_CONTROL permission |
| * @hide |
| */ |
| @RequiresPermission(value = android.Manifest.permission.MEDIA_CONTENT_CONTROL) |
| public synchronized void setMediaSource(ComponentName componentName) { |
| try { |
| mService.setMediaSource(componentName); |
| } catch (RemoteException e) { |
| handleRemoteExceptionFromCarService(e); |
| } |
| } |
| |
| /** |
| * Register a callback that receives updates to the active media source. |
| * Requires android.Manifest.permission.MEDIA_CONTENT_CONTROL permission |
| * @hide |
| */ |
| @RequiresPermission(value = android.Manifest.permission.MEDIA_CONTENT_CONTROL) |
| public synchronized void registerMediaSourceListener(MediaSourceChangedListener callback) { |
| try { |
| ICarMediaSourceListener binderCallback = new ICarMediaSourceListener.Stub() { |
| @Override |
| public void onMediaSourceChanged(ComponentName componentName) { |
| callback.onMediaSourceChanged(componentName); |
| } |
| }; |
| mCallbackMap.put(callback, binderCallback); |
| mService.registerMediaSourceListener(binderCallback); |
| } catch (RemoteException e) { |
| handleRemoteExceptionFromCarService(e); |
| } |
| } |
| |
| /** |
| * Unregister a callback that receives updates to the active media source. |
| * Requires android.Manifest.permission.MEDIA_CONTENT_CONTROL permission |
| * @hide |
| */ |
| @RequiresPermission(value = android.Manifest.permission.MEDIA_CONTENT_CONTROL) |
| public synchronized void unregisterMediaSourceListener(MediaSourceChangedListener callback) { |
| try { |
| ICarMediaSourceListener binderCallback = mCallbackMap.remove(callback); |
| mService.unregisterMediaSourceListener(binderCallback); |
| } catch (RemoteException e) { |
| handleRemoteExceptionFromCarService(e); |
| } |
| } |
| |
| /** @hide */ |
| @Override |
| public synchronized void onCarDisconnected() { |
| // TODO(b/142733057) Fix synchronization to use separate mLock |
| mCallbackMap.clear(); |
| } |
| } |