| /* |
| * 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.Context; |
| import android.os.IBinder; |
| import android.os.ParcelUuid; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.server.BluetoothA2dpService; |
| 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 = false; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the A2DP |
| * profile. |
| * |
| * <p>This intent will have 3 extras: |
| * {@link #EXTRA_STATE} - The current state of the profile. |
| * {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile |
| * {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. |
| * |
| * {@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} 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: |
| * {@link #EXTRA_STATE} - The current state of the profile. |
| * {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile |
| * {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. |
| * |
| * {@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} to receive. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PLAYING_STATE_CHANGED = |
| "android.bluetooth.a2dp.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; |
| |
| private ServiceListener mServiceListener; |
| private IBluetoothA2dp mService; |
| private BluetoothAdapter mAdapter; |
| |
| /** |
| * Create a BluetoothA2dp proxy object for interacting with the local |
| * Bluetooth A2DP service. |
| * |
| */ |
| /*package*/ BluetoothA2dp(Context mContext, ServiceListener l) { |
| IBinder b = ServiceManager.getService(BluetoothA2dpService.BLUETOOTH_A2DP_SERVICE); |
| mServiceListener = l; |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| if (b != null) { |
| mService = IBluetoothA2dp.Stub.asInterface(b); |
| if (mServiceListener != null) { |
| mServiceListener.onServiceConnected(BluetoothProfile.A2DP, this); |
| } |
| } else { |
| Log.w(TAG, "Bluetooth A2DP service not available!"); |
| |
| // Instead of throwing an exception which prevents people from going |
| // into Wireless settings in the emulator. Let it crash later when it is actually used. |
| mService = null; |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @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; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @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 (DBG) 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 (DBG) 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 (DBG) 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; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @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; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * @hide |
| */ |
| public int getPriority(BluetoothDevice device) { |
| if (DBG) 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; |
| } |
| |
| /** |
| * Check if A2DP profile is streaming music. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} |
| * |
| * @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; |
| } |
| |
| /** |
| * Initiate suspend from an A2DP sink. |
| * |
| * <p> This API will return false in scenarios like the A2DP |
| * device is not in connected state etc. When this API returns, |
| * true, it is guaranteed that {@link #ACTION_SINK_STATE_CHANGED} |
| * intent will be broadcasted with the state. Users can get the |
| * state of the A2DP device from this intent. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * |
| * @param device Remote A2DP sink |
| * @return false on immediate error, |
| * true otherwise |
| * @hide |
| */ |
| public boolean suspendSink(BluetoothDevice device) { |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| try { |
| return mService.suspendSink(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 resume from a suspended A2DP sink. |
| * |
| * <p> This API will return false in scenarios like the A2DP |
| * device is not in suspended state etc. When this API returns, |
| * true, it is guaranteed that {@link #ACTION_SINK_STATE_CHANGED} |
| * intent will be broadcasted with the state. Users can get the |
| * state of the A2DP device from this intent. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * |
| * @param device Remote A2DP sink |
| * @return false on immediate error, |
| * true otherwise |
| * @hide |
| */ |
| public boolean resumeSink(BluetoothDevice device) { |
| if (mService != null && isEnabled() |
| && isValidDevice(device)) { |
| try { |
| return mService.resumeSink(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 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); |
| } |
| } |