| /* |
| * Copyright (C) 2014 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.bluetooth; |
| |
| import android.annotation.UnsupportedAppUsage; |
| import android.content.Context; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * This class provides the public APIs to control the Bluetooth A2DP Sink |
| * profile. |
| * |
| * <p>BluetoothA2dpSink is a proxy object for controlling the Bluetooth A2DP Sink |
| * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get |
| * the BluetoothA2dpSink proxy object. |
| * |
| * @hide |
| */ |
| public final class BluetoothA2dpSink implements BluetoothProfile { |
| private static final String TAG = "BluetoothA2dpSink"; |
| private static final boolean DBG = true; |
| private static final boolean VDBG = false; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the A2DP Sink |
| * profile. |
| * |
| * <p>This intent will have 3 extras: |
| * <ul> |
| * <li> {@link #EXTRA_STATE} - The current state of the profile. </li> |
| * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li> |
| * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li> |
| * </ul> |
| * |
| * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of |
| * {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, |
| * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to |
| * receive. |
| */ |
| public static final String ACTION_CONNECTION_STATE_CHANGED = |
| "android.bluetooth.a2dp-sink.profile.action.CONNECTION_STATE_CHANGED"; |
| |
| /** |
| * Intent used to broadcast the change in the Playing state of the A2DP Sink |
| * profile. |
| * |
| * <p>This intent will have 3 extras: |
| * <ul> |
| * <li> {@link #EXTRA_STATE} - The current state of the profile. </li> |
| * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile. </li> |
| * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li> |
| * </ul> |
| * |
| * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of |
| * {@link #STATE_PLAYING}, {@link #STATE_NOT_PLAYING}, |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to |
| * receive. |
| */ |
| public static final String ACTION_PLAYING_STATE_CHANGED = |
| "android.bluetooth.a2dp-sink.profile.action.PLAYING_STATE_CHANGED"; |
| |
| /** |
| * A2DP sink device is streaming music. This state can be one of |
| * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of |
| * {@link #ACTION_PLAYING_STATE_CHANGED} intent. |
| */ |
| public static final int STATE_PLAYING = 10; |
| |
| /** |
| * A2DP sink device is NOT streaming music. This state can be one of |
| * {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of |
| * {@link #ACTION_PLAYING_STATE_CHANGED} intent. |
| */ |
| public static final int STATE_NOT_PLAYING = 11; |
| |
| /** |
| * Intent used to broadcast the change in the Playing state of the A2DP Sink |
| * profile. |
| * |
| * <p>This intent will have 3 extras: |
| * <ul> |
| * <li> {@link #EXTRA_AUDIO_CONFIG} - The audio configuration for the remote device. </li> |
| * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li> |
| * </ul> |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to |
| * receive. |
| */ |
| public static final String ACTION_AUDIO_CONFIG_CHANGED = |
| "android.bluetooth.a2dp-sink.profile.action.AUDIO_CONFIG_CHANGED"; |
| |
| /** |
| * Extra for the {@link #ACTION_AUDIO_CONFIG_CHANGED} intent. |
| * |
| * This extra represents the current audio configuration of the A2DP source device. |
| * {@see BluetoothAudioConfig} |
| */ |
| public static final String EXTRA_AUDIO_CONFIG = |
| "android.bluetooth.a2dp-sink.profile.extra.AUDIO_CONFIG"; |
| |
| private BluetoothAdapter mAdapter; |
| private final BluetoothProfileConnector<IBluetoothA2dpSink> mProfileConnector = |
| new BluetoothProfileConnector(this, BluetoothProfile.A2DP_SINK, |
| "BluetoothA2dpSink", IBluetoothA2dpSink.class.getName()) { |
| @Override |
| public IBluetoothA2dpSink getServiceInterface(IBinder service) { |
| return IBluetoothA2dpSink.Stub.asInterface(Binder.allowBlocking(service)); |
| } |
| }; |
| |
| /** |
| * Create a BluetoothA2dp proxy object for interacting with the local |
| * Bluetooth A2DP service. |
| */ |
| /*package*/ BluetoothA2dpSink(Context context, ServiceListener listener) { |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| mProfileConnector.connect(context, listener); |
| } |
| |
| /*package*/ void close() { |
| mProfileConnector.disconnect(); |
| } |
| |
| private IBluetoothA2dpSink getService() { |
| return mProfileConnector.getService(); |
| } |
| |
| @Override |
| public void finalize() { |
| close(); |
| } |
| |
| /** |
| * Initiate connection to a profile of the remote bluetooth device. |
| * |
| * <p> Currently, the system supports only 1 connection to the |
| * A2DP profile. The API will automatically disconnect connected |
| * devices before connecting. |
| * |
| * <p> This API returns false in scenarios like the profile on the |
| * device is already connected or Bluetooth is not turned on. |
| * When this API returns true, it is guaranteed that |
| * connection state intent for the profile will be broadcasted with |
| * the state. Users can get the connection state of the profile |
| * from this intent. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * permission. |
| * |
| * @param device Remote Bluetooth Device |
| * @return false on immediate error, true otherwise |
| * @hide |
| */ |
| public boolean connect(BluetoothDevice device) { |
| if (DBG) log("connect(" + device + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.connect(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * Initiate disconnection from a profile |
| * |
| * <p> This API will return false in scenarios like the profile on the |
| * Bluetooth device is not in connected state etc. When this API returns, |
| * true, it is guaranteed that the connection state change |
| * intent will be broadcasted with the state. Users can get the |
| * disconnection state of the profile from this intent. |
| * |
| * <p> If the disconnection is initiated by a remote device, the state |
| * will transition from {@link #STATE_CONNECTED} to |
| * {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the |
| * host (local) device the state will transition from |
| * {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to |
| * state {@link #STATE_DISCONNECTED}. The transition to |
| * {@link #STATE_DISCONNECTING} can be used to distinguish between the |
| * two scenarios. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * permission. |
| * |
| * @param device Remote Bluetooth Device |
| * @return false on immediate error, true otherwise |
| * @hide |
| */ |
| @UnsupportedAppUsage |
| public boolean disconnect(BluetoothDevice device) { |
| if (DBG) log("disconnect(" + device + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.disconnect(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public List<BluetoothDevice> getConnectedDevices() { |
| if (VDBG) log("getConnectedDevices()"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled()) { |
| try { |
| return service.getConnectedDevices(); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { |
| if (VDBG) log("getDevicesMatchingStates()"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled()) { |
| try { |
| return service.getDevicesMatchingConnectionStates(states); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int getConnectionState(BluetoothDevice device) { |
| if (VDBG) log("getState(" + device + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.getConnectionState(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| |
| /** |
| * Get the current audio configuration for the A2DP source device, |
| * or null if the device has no audio configuration |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission. |
| * |
| * @param device Remote bluetooth device. |
| * @return audio configuration for the device, or null |
| * |
| * {@see BluetoothAudioConfig} |
| */ |
| public BluetoothAudioConfig getAudioConfig(BluetoothDevice device) { |
| if (VDBG) log("getAudioConfig(" + device + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.getAudioConfig(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return null; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return null; |
| } |
| |
| /** |
| * Set priority of the profile |
| * |
| * <p> The device should already be paired. |
| * Priority can be one of {@link #PRIORITY_ON} orgetBluetoothManager |
| * {@link #PRIORITY_OFF}, |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * permission. |
| * |
| * @param device Paired bluetooth device |
| * @param priority |
| * @return true if priority is set, false on error |
| * @hide |
| */ |
| public boolean setPriority(BluetoothDevice device, int priority) { |
| if (DBG) log("setPriority(" + device + ", " + priority + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| if (priority != BluetoothProfile.PRIORITY_OFF |
| && priority != BluetoothProfile.PRIORITY_ON) { |
| return false; |
| } |
| try { |
| return service.setPriority(device, priority); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * Get the priority of the profile. |
| * |
| * <p> The priority can be any of: |
| * {@link #PRIORITY_AUTO_CONNECT}, {@link #PRIORITY_OFF}, |
| * {@link #PRIORITY_ON}, {@link #PRIORITY_UNDEFINED} |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission. |
| * |
| * @param device Bluetooth device |
| * @return priority of the device |
| * @hide |
| */ |
| public int getPriority(BluetoothDevice device) { |
| if (VDBG) log("getPriority(" + device + ")"); |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.getPriority(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return BluetoothProfile.PRIORITY_OFF; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return BluetoothProfile.PRIORITY_OFF; |
| } |
| |
| /** |
| * Check if A2DP profile is streaming music. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission. |
| * |
| * @param device BluetoothDevice device |
| */ |
| public boolean isA2dpPlaying(BluetoothDevice device) { |
| final IBluetoothA2dpSink service = getService(); |
| if (service != null && isEnabled() && isValidDevice(device)) { |
| try { |
| return service.isA2dpPlaying(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (service == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * Helper for converting a state to a string. |
| * |
| * For debug use only - strings are not internationalized. |
| * |
| * @hide |
| */ |
| public static String stateToString(int state) { |
| switch (state) { |
| case STATE_DISCONNECTED: |
| return "disconnected"; |
| case STATE_CONNECTING: |
| return "connecting"; |
| case STATE_CONNECTED: |
| return "connected"; |
| case STATE_DISCONNECTING: |
| return "disconnecting"; |
| case STATE_PLAYING: |
| return "playing"; |
| case STATE_NOT_PLAYING: |
| return "not playing"; |
| default: |
| return "<unknown state " + state + ">"; |
| } |
| } |
| |
| private boolean isEnabled() { |
| return mAdapter.getState() == BluetoothAdapter.STATE_ON; |
| } |
| |
| private static boolean isValidDevice(BluetoothDevice device) { |
| return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress()); |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |
