| /* |
| * 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.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.media.MediaMetadata; |
| import android.media.session.PlaybackState; |
| 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 AVRCP Controller. It currently |
| * supports player information, playback support and track metadata. |
| * |
| *<p>BluetoothAvrcpController is a proxy object for controlling the Bluetooth AVRCP |
| * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get |
| * the BluetoothAvrcpController proxy object. |
| * |
| * {@hide} |
| */ |
| public final class BluetoothAvrcpController implements BluetoothProfile { |
| private static final String TAG = "BluetoothAvrcpController"; |
| private static final boolean DBG = false; |
| private static final boolean VDBG = false; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the AVRCP Controller |
| * 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.avrcp-controller.profile.action.CONNECTION_STATE_CHANGED"; |
| |
| /** |
| * Intent used to broadcast the change in metadata state of playing track on the AVRCP |
| * AG. |
| * |
| * <p>This intent will have the two extras: |
| * <ul> |
| * <li> {@link #EXTRA_METADATA} - {@link MediaMetadata} containing the current metadata.</li> |
| * <li> {@link #EXTRA_PLAYBACK} - {@link PlaybackState} containing the current playback |
| * state. </li> |
| * </ul> |
| */ |
| public static final String ACTION_TRACK_EVENT = |
| "android.bluetooth.avrcp-controller.profile.action.TRACK_EVENT"; |
| |
| |
| /** |
| * Intent used to broadcast the change in player application setting state on AVRCP AG. |
| * |
| * <p>This intent will have the following extras: |
| * <ul> |
| * <li> {@link #EXTRA_PLAYER_SETTING} - {@link BluetoothAvrcpPlayerSettings} containing the |
| * most recent player setting. </li> |
| * </ul> |
| */ |
| public static final String ACTION_PLAYER_SETTING = |
| "android.bluetooth.avrcp-controller.profile.action.PLAYER_SETTING"; |
| |
| public static final String EXTRA_METADATA = |
| "android.bluetooth.avrcp-controller.profile.extra.METADATA"; |
| |
| public static final String EXTRA_PLAYBACK = |
| "android.bluetooth.avrcp-controller.profile.extra.PLAYBACK"; |
| |
| public static final String EXTRA_PLAYER_SETTING = |
| "android.bluetooth.avrcp-controller.profile.extra.PLAYER_SETTING"; |
| |
| /* |
| * KeyCoded for Pass Through Commands |
| */ |
| public static final int PASS_THRU_CMD_ID_PLAY = 0x44; |
| public static final int PASS_THRU_CMD_ID_PAUSE = 0x46; |
| public static final int PASS_THRU_CMD_ID_VOL_UP = 0x41; |
| public static final int PASS_THRU_CMD_ID_VOL_DOWN = 0x42; |
| public static final int PASS_THRU_CMD_ID_STOP = 0x45; |
| public static final int PASS_THRU_CMD_ID_FF = 0x49; |
| public static final int PASS_THRU_CMD_ID_REWIND = 0x48; |
| public static final int PASS_THRU_CMD_ID_FORWARD = 0x4B; |
| public static final int PASS_THRU_CMD_ID_BACKWARD = 0x4C; |
| /* Key State Variables */ |
| public static final int KEY_STATE_PRESSED = 0; |
| public static final int KEY_STATE_RELEASED = 1; |
| /* Group Navigation Key Codes */ |
| public static final int PASS_THRU_CMD_ID_NEXT_GRP = 0x00; |
| public static final int PASS_THRU_CMD_ID_PREV_GRP = 0x01; |
| |
| |
| private Context mContext; |
| private ServiceListener mServiceListener; |
| private IBluetoothAvrcpController 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 BluetoothAvrcpController proxy object for interacting with the local |
| * Bluetooth AVRCP service. |
| * |
| */ |
| /*package*/ BluetoothAvrcpController(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(IBluetoothAvrcpController.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 AVRCP Controller 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(); |
| } |
| |
| /** |
| * {@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; |
| } |
| |
| public void sendPassThroughCmd(BluetoothDevice device, int keyCode, int keyState) { |
| if (DBG) Log.d(TAG, "sendPassThroughCmd"); |
| if (mService != null && isEnabled()) { |
| try { |
| mService.sendPassThroughCmd(device, keyCode, keyState); |
| return; |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in sendPassThroughCmd()", e); |
| return; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| } |
| |
| /** |
| * Gets the player application settings. |
| * |
| * @return the {@link BluetoothAvrcpPlayerSettings} or {@link null} if there is an error. |
| */ |
| public BluetoothAvrcpPlayerSettings getPlayerSettings(BluetoothDevice device) { |
| if (DBG) Log.d(TAG, "getPlayerSettings"); |
| BluetoothAvrcpPlayerSettings settings = null; |
| if (mService != null && isEnabled()) { |
| try { |
| settings = mService.getPlayerSettings(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in getMetadata() " + e); |
| return null; |
| } |
| } |
| return settings; |
| } |
| |
| /** |
| * Gets the metadata for the current track. |
| * |
| * This should be usually called when application UI needs to be updated, eg. when the track |
| * changes or immediately after connecting and getting the current state. |
| * @return the {@link MediaMetadata} or {@link null} if there is an error. |
| */ |
| public MediaMetadata getMetadata(BluetoothDevice device) { |
| if (DBG) Log.d(TAG, "getMetadata"); |
| MediaMetadata metadata = null; |
| if (mService != null && isEnabled()) { |
| try { |
| metadata = mService.getMetadata(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in getMetadata() " + e); |
| return null; |
| } |
| } |
| return metadata; |
| } |
| |
| /** |
| * Gets the playback state for current track. |
| * |
| * When the application is first connecting it can use current track state to get playback info. |
| * For all further updates it should listen to notifications. |
| * @return the {@link PlaybackState} or {@link null} if there is an error. |
| */ |
| public PlaybackState getPlaybackState(BluetoothDevice device) { |
| if (DBG) Log.d(TAG, "getPlaybackState"); |
| PlaybackState playbackState = null; |
| if (mService != null && isEnabled()) { |
| try { |
| playbackState = mService.getPlaybackState(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, |
| "Error talking to BT service in getPlaybackState() " + e); |
| return null; |
| } |
| } |
| return playbackState; |
| } |
| |
| /** |
| * Sets the player app setting for current player. |
| * returns true in case setting is supported by remote, false otherwise |
| */ |
| public boolean setPlayerApplicationSetting(BluetoothAvrcpPlayerSettings plAppSetting) { |
| if (DBG) Log.d(TAG, "setPlayerApplicationSetting"); |
| if (mService != null && isEnabled()) { |
| try { |
| return mService.setPlayerApplicationSetting(plAppSetting); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in setPlayerApplicationSetting() " + e); |
| return false; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| return false; |
| } |
| |
| /* |
| * Send Group Navigation Command to Remote. |
| * possible keycode values: next_grp, previous_grp defined above |
| */ |
| public void sendGroupNavigationCmd(BluetoothDevice device, int keyCode, int keyState) { |
| Log.d(TAG, "sendGroupNavigationCmd dev = " + device + " key " + keyCode + " State = " + keyState); |
| if (mService != null && isEnabled()) { |
| try { |
| mService.sendGroupNavigationCmd(device, keyCode, keyState); |
| return; |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error talking to BT service in sendGroupNavigationCmd()", e); |
| return; |
| } |
| } |
| if (mService == null) Log.w(TAG, "Proxy not attached to service"); |
| } |
| |
| private final ServiceConnection mConnection = new ServiceConnection() { |
| public void onServiceConnected(ComponentName className, IBinder service) { |
| if (DBG) Log.d(TAG, "Proxy object connected"); |
| mService = IBluetoothAvrcpController.Stub.asInterface(service); |
| |
| if (mServiceListener != null) { |
| mServiceListener.onServiceConnected(BluetoothProfile.AVRCP_CONTROLLER, |
| BluetoothAvrcpController.this); |
| } |
| } |
| public void onServiceDisconnected(ComponentName className) { |
| if (DBG) Log.d(TAG, "Proxy object disconnected"); |
| mService = null; |
| if (mServiceListener != null) { |
| mServiceListener.onServiceDisconnected(BluetoothProfile.AVRCP_CONTROLLER); |
| } |
| } |
| }; |
| |
| 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); |
| } |
| } |
