| /* |
| * Copyright (C) 2008 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.SdkConstant; |
| import android.annotation.SdkConstant.SdkConstantType; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.os.IBinder; |
| import android.os.ParcelUuid; |
| 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 |
| * profile. |
| * |
| *<p>BluetoothA2dp is a proxy object for controlling the Bluetooth A2DP |
| * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get |
| * the BluetoothA2dp proxy object. |
| * |
| * <p> Android only supports one connected Bluetooth A2dp device at a time. |
| * Each method is protected with its appropriate permission. |
| */ |
| public final class BluetoothA2dp implements BluetoothProfile { |
| private static final String TAG = "BluetoothA2dp"; |
| private static final boolean DBG = true; |
| private static final boolean VDBG = false; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the A2DP |
| * 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. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_CONNECTION_STATE_CHANGED = |
| "android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED"; |
| |
| /** |
| * Intent used to broadcast the change in the Playing state of the A2DP |
| * 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. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PLAYING_STATE_CHANGED = |
| "android.bluetooth.a2dp.profile.action.PLAYING_STATE_CHANGED"; |
| |
| /** @hide */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_AVRCP_CONNECTION_STATE_CHANGED = |
| "android.bluetooth.a2dp.profile.action.AVRCP_CONNECTION_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; |
| |
| private Context mContext; |
| private ServiceListener mServiceListener; |
| private IBluetoothA2dp mService; |
| private BluetoothAdapter mAdapter; |
| |
| final private IBluetoothStateChangeCallback mBluetoothStateChangeCallback = |
| new IBluetoothStateChangeCallback.Stub() { |
| public void onBluetoothStateChange(boolean up) { |
| if (DBG) Log.d(TAG, "onBluetoothStateChange: up=" + up); |
| if (!up) { |
| if (VDBG) Log.d(TAG,"Unbinding service..."); |
| synchronized (mConnection) { |
| try { |
| mService = null; |
| mContext.unbindService(mConnection); |
| } catch (Exception re) { |
| Log.e(TAG,"",re); |
| } |
| } |
| } else { |
| synchronized (mConnection) { |
| try { |
| if (mService == null) { |
| if (VDBG) Log.d(TAG,"Binding service..."); |
| doBind(); |
| } |
| } catch (Exception re) { |
| Log.e(TAG,"",re); |
| } |
| } |
| } |
| } |
| }; |
| /** |
| * Create a BluetoothA2dp proxy object for interacting with the local |
| * Bluetooth A2DP service. |
| * |
| */ |
| /*package*/ BluetoothA2dp(Context context, ServiceListener l) { |
| mContext = context; |
| mServiceListener = l; |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| IBluetoothManager mgr = mAdapter.getBluetoothManager(); |
| if (mgr != null) { |
| try { |
| mgr.registerStateChangeCallback(mBluetoothStateChangeCallback); |
| } catch (RemoteException e) { |
| Log.e(TAG,"",e); |
| } |
| } |
| |
| doBind(); |
| } |
| |
| boolean doBind() { |
| Intent intent = new Intent(IBluetoothA2dp.class.getName()); |
| ComponentName comp = intent.resolveSystemService(mContext.getPackageManager(), 0); |
| intent.setComponent(comp); |
| if (comp == null || !mContext.bindServiceAsUser(intent, mConnection, 0, |
| android.os.Process.myUserHandle())) { |
| Log.e(TAG, "Could not bind to Bluetooth A2DP Service with " + intent); |
| return false; |
| } |
| return true; |
| } |
| |
| /*package*/ void close() { |
| mServiceListener = null; |
| IBluetoothManager mgr = mAdapter.getBluetoothManager(); |
| if (mgr != null) { |
| try { |
| mgr.unregisterStateChangeCallback(mBluetoothStateChangeCallback); |
| } catch (Exception e) { |
| Log.e(TAG,"",e); |
| } |
| } |
| |
| synchronized (mConnection) { |
| if (mService != null) { |
| try { |
| mService = null; |
| mContext.unbindService(mConnection); |
| } catch (Exception re) { |
| Log.e(TAG,"",re); |
| } |
| } |
| } |
| } |
| |
| 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 + ")"); |
| if (mService != null && isEnabled() && |
| isValidDevice(device)) { |
| try { |
| return mService.connect(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (mService == 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 |
| */ |
| public boolean disconnect(BluetoothDevice device) { |
| if (DBG) log("disconnect(" + device + ")"); |
| if (mService != null && isEnabled() && |
| isValidDevice(device)) { |
| try { |
| return mService.disconnect(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public List<BluetoothDevice> getConnectedDevices() { |
| if (VDBG) log("getConnectedDevices()"); |
| if (mService != null && isEnabled()) { |
| try { |
| return mService.getConnectedDevices(); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { |
| if (VDBG) log("getDevicesMatchingStates()"); |
| if (mService != null && isEnabled()) { |
| try { |
| return mService.getDevicesMatchingConnectionStates(states); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return new ArrayList<BluetoothDevice>(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public int getConnectionState(BluetoothDevice device) { |
| if (VDBG) log("getState(" + device + ")"); |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| try { |
| return mService.getConnectionState(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| |
| /** |
| * 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 + ")"); |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| if (priority != BluetoothProfile.PRIORITY_OFF && |
| priority != BluetoothProfile.PRIORITY_ON){ |
| return false; |
| } |
| try { |
| return mService.setPriority(device, priority); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (mService == 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 + ")"); |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| try { |
| return mService.getPriority(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return BluetoothProfile.PRIORITY_OFF; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return BluetoothProfile.PRIORITY_OFF; |
| } |
| |
| /** |
| * Checks if Avrcp device supports the absolute volume feature. |
| * |
| * @return true if device supports absolute volume |
| * @hide |
| */ |
| public boolean isAvrcpAbsoluteVolumeSupported() { |
| if (DBG) Log.d(TAG, "isAvrcpAbsoluteVolumeSupported"); |
| if (mService != null && isEnabled()) { |
| try { |
| return mService.isAvrcpAbsoluteVolumeSupported(); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in isAvrcpAbsoluteVolumeSupported()", e); |
| return false; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * Tells remote device to adjust volume. Only if absolute volume is supported. |
| * |
| * @param direction 1 to increase volume, or -1 to decrease volume |
| * @hide |
| */ |
| public void adjustAvrcpAbsoluteVolume(int direction) { |
| if (DBG) Log.d(TAG, "adjustAvrcpAbsoluteVolume"); |
| if (mService != null && isEnabled()) { |
| try { |
| mService.adjustAvrcpAbsoluteVolume(direction); |
| return; |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in adjustAvrcpAbsoluteVolume()", e); |
| return; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| } |
| |
| /** |
| * Tells remote device to set an absolute volume. Only if absolute volume is supported |
| * |
| * @param volume Absolute volume to be set on AVRCP side |
| * @hide |
| */ |
| public void setAvrcpAbsoluteVolume(int volume) { |
| if (DBG) Log.d(TAG, "setAvrcpAbsoluteVolume"); |
| if (mService != null && isEnabled()) { |
| try { |
| mService.setAvrcpAbsoluteVolume(volume); |
| return; |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in setAvrcpAbsoluteVolume()", e); |
| return; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| } |
| |
| /** |
| * Check if A2DP profile is streaming music. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission. |
| * |
| * @param device BluetoothDevice device |
| */ |
| public boolean isA2dpPlaying(BluetoothDevice device) { |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| try { |
| return mService.isA2dpPlaying(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); |
| return false; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /** |
| * This function checks if the remote device is an AVCRP |
| * target and thus whether we should send volume keys |
| * changes or not. |
| * @hide |
| */ |
| public boolean shouldSendVolumeKeys(BluetoothDevice device) { |
| if (isEnabled() && isValidDevice(device)) { |
| ParcelUuid[] uuids = device.getUuids(); |
| if (uuids == null) return false; |
| |
| for (ParcelUuid uuid: uuids) { |
| if (BluetoothUuid.isAvrcpTarget(uuid)) { |
| return true; |
| } |
| } |
| } |
| 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 final ServiceConnection mConnection = new ServiceConnection() { |
| public void onServiceConnected(ComponentName className, IBinder service) { |
| if (DBG) Log.d(TAG, "Proxy object connected"); |
| mService = IBluetoothA2dp.Stub.asInterface(service); |
| |
| if (mServiceListener != null) { |
| mServiceListener.onServiceConnected(BluetoothProfile.A2DP, BluetoothA2dp.this); |
| } |
| } |
| public void onServiceDisconnected(ComponentName className) { |
| if (DBG) Log.d(TAG, "Proxy object disconnected"); |
| mService = null; |
| if (mServiceListener != null) { |
| mServiceListener.onServiceDisconnected(BluetoothProfile.A2DP); |
| } |
| } |
| }; |
| |
| private boolean isEnabled() { |
| if (mAdapter.getState() == BluetoothAdapter.STATE_ON) return true; |
| return false; |
| } |
| |
| private boolean isValidDevice(BluetoothDevice device) { |
| if (device == null) return false; |
| |
| if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) return true; |
| return false; |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |
