/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import android.annotation.UnsupportedAppUsage;
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import android.content.Context;
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import android.os.Binder;
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import android.os.IBinder;
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import android.os.RemoteException;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* This class provides the public APIs to control the Bluetooth A2DP Sink
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* profile.
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*
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* <p>BluetoothA2dpSink is a proxy object for controlling the Bluetooth A2DP Sink
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* Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
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* the BluetoothA2dpSink proxy object.
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*
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* @hide
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*/
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public final class BluetoothA2dpSink implements BluetoothProfile {
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private static final String TAG = "BluetoothA2dpSink";
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private static final boolean DBG = true;
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private static final boolean VDBG = false;
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/**
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* Intent used to broadcast the change in connection state of the A2DP Sink
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* profile.
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*
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* <p>This intent will have 3 extras:
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* <ul>
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* <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
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* <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li>
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* <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
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* </ul>
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*
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* <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
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* {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING},
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* {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
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* receive.
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*/
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public static final String ACTION_CONNECTION_STATE_CHANGED =
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"android.bluetooth.a2dp-sink.profile.action.CONNECTION_STATE_CHANGED";
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/**
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* Intent used to broadcast the change in the Playing state of the A2DP Sink
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* profile.
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*
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* <p>This intent will have 3 extras:
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* <ul>
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* <li> {@link #EXTRA_STATE} - The current state of the profile. </li>
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* <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile. </li>
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* <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
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* </ul>
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*
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* <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of
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* {@link #STATE_PLAYING}, {@link #STATE_NOT_PLAYING},
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
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* receive.
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*/
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public static final String ACTION_PLAYING_STATE_CHANGED =
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"android.bluetooth.a2dp-sink.profile.action.PLAYING_STATE_CHANGED";
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/**
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* A2DP sink device is streaming music. This state can be one of
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* {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
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* {@link #ACTION_PLAYING_STATE_CHANGED} intent.
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*/
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public static final int STATE_PLAYING = 10;
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/**
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* A2DP sink device is NOT streaming music. This state can be one of
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* {@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} of
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* {@link #ACTION_PLAYING_STATE_CHANGED} intent.
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*/
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public static final int STATE_NOT_PLAYING = 11;
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/**
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* Intent used to broadcast the change in the Playing state of the A2DP Sink
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* profile.
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*
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* <p>This intent will have 3 extras:
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* <ul>
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* <li> {@link #EXTRA_AUDIO_CONFIG} - The audio configuration for the remote device. </li>
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* <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li>
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* </ul>
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
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* receive.
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*/
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public static final String ACTION_AUDIO_CONFIG_CHANGED =
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"android.bluetooth.a2dp-sink.profile.action.AUDIO_CONFIG_CHANGED";
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/**
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* Extra for the {@link #ACTION_AUDIO_CONFIG_CHANGED} intent.
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*
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* This extra represents the current audio configuration of the A2DP source device.
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* {@see BluetoothAudioConfig}
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*/
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public static final String EXTRA_AUDIO_CONFIG =
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"android.bluetooth.a2dp-sink.profile.extra.AUDIO_CONFIG";
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private BluetoothAdapter mAdapter;
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private final BluetoothProfileConnector<IBluetoothA2dpSink> mProfileConnector =
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new BluetoothProfileConnector(this, BluetoothProfile.A2DP_SINK,
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"BluetoothA2dpSink", IBluetoothA2dpSink.class.getName()) {
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@Override
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public IBluetoothA2dpSink getServiceInterface(IBinder service) {
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return IBluetoothA2dpSink.Stub.asInterface(Binder.allowBlocking(service));
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}
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};
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/**
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* Create a BluetoothA2dp proxy object for interacting with the local
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* Bluetooth A2DP service.
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*/
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/*package*/ BluetoothA2dpSink(Context context, ServiceListener listener) {
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mAdapter = BluetoothAdapter.getDefaultAdapter();
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mProfileConnector.connect(context, listener);
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}
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/*package*/ void close() {
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mProfileConnector.disconnect();
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}
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private IBluetoothA2dpSink getService() {
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return mProfileConnector.getService();
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}
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@Override
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public void finalize() {
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close();
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}
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/**
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* Initiate connection to a profile of the remote bluetooth device.
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*
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* <p> Currently, the system supports only 1 connection to the
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* A2DP profile. The API will automatically disconnect connected
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* devices before connecting.
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*
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* <p> This API returns false in scenarios like the profile on the
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* device is already connected or Bluetooth is not turned on.
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* When this API returns true, it is guaranteed that
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* connection state intent for the profile will be broadcasted with
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* the state. Users can get the connection state of the profile
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* from this intent.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
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* permission.
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*
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* @param device Remote Bluetooth Device
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* @return false on immediate error, true otherwise
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* @hide
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*/
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public boolean connect(BluetoothDevice device) {
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if (DBG) log("connect(" + device + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.connect(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* Initiate disconnection from a profile
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*
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* <p> This API will return false in scenarios like the profile on the
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* Bluetooth device is not in connected state etc. When this API returns,
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* true, it is guaranteed that the connection state change
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* intent will be broadcasted with the state. Users can get the
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* disconnection state of the profile from this intent.
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*
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* <p> If the disconnection is initiated by a remote device, the state
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* will transition from {@link #STATE_CONNECTED} to
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* {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the
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* host (local) device the state will transition from
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* {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to
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* state {@link #STATE_DISCONNECTED}. The transition to
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* {@link #STATE_DISCONNECTING} can be used to distinguish between the
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* two scenarios.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
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* permission.
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*
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* @param device Remote Bluetooth Device
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* @return false on immediate error, true otherwise
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* @hide
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*/
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@UnsupportedAppUsage
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public boolean disconnect(BluetoothDevice device) {
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if (DBG) log("disconnect(" + device + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.disconnect(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public List<BluetoothDevice> getConnectedDevices() {
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if (VDBG) log("getConnectedDevices()");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled()) {
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try {
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return service.getConnectedDevices();
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return new ArrayList<BluetoothDevice>();
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return new ArrayList<BluetoothDevice>();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
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if (VDBG) log("getDevicesMatchingStates()");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled()) {
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try {
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return service.getDevicesMatchingConnectionStates(states);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return new ArrayList<BluetoothDevice>();
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return new ArrayList<BluetoothDevice>();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public int getConnectionState(BluetoothDevice device) {
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if (VDBG) log("getState(" + device + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.getConnectionState(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return BluetoothProfile.STATE_DISCONNECTED;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return BluetoothProfile.STATE_DISCONNECTED;
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}
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/**
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* Get the current audio configuration for the A2DP source device,
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* or null if the device has no audio configuration
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
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*
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* @param device Remote bluetooth device.
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* @return audio configuration for the device, or null
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*
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* {@see BluetoothAudioConfig}
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*/
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public BluetoothAudioConfig getAudioConfig(BluetoothDevice device) {
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if (VDBG) log("getAudioConfig(" + device + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.getAudioConfig(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return null;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return null;
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}
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/**
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* Set priority of the profile
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*
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* <p> The device should already be paired.
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* Priority can be one of {@link #PRIORITY_ON} orgetBluetoothManager
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* {@link #PRIORITY_OFF},
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
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* permission.
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*
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* @param device Paired bluetooth device
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* @param priority
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* @return true if priority is set, false on error
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* @hide
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*/
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public boolean setPriority(BluetoothDevice device, int priority) {
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if (DBG) log("setPriority(" + device + ", " + priority + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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if (priority != BluetoothProfile.PRIORITY_OFF
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&& priority != BluetoothProfile.PRIORITY_ON) {
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return false;
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}
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try {
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return service.setPriority(device, priority);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* Get the priority of the profile.
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*
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* <p> The priority can be any of:
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* {@link #PRIORITY_AUTO_CONNECT}, {@link #PRIORITY_OFF},
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* {@link #PRIORITY_ON}, {@link #PRIORITY_UNDEFINED}
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
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*
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* @param device Bluetooth device
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* @return priority of the device
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* @hide
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*/
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public int getPriority(BluetoothDevice device) {
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if (VDBG) log("getPriority(" + device + ")");
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.getPriority(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return BluetoothProfile.PRIORITY_OFF;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return BluetoothProfile.PRIORITY_OFF;
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}
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/**
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* Check if A2DP profile is streaming music.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission.
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*
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* @param device BluetoothDevice device
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*/
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public boolean isA2dpPlaying(BluetoothDevice device) {
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final IBluetoothA2dpSink service = getService();
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if (service != null && isEnabled() && isValidDevice(device)) {
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try {
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return service.isA2dpPlaying(device);
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} catch (RemoteException e) {
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Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
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return false;
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}
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}
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if (service == null) Log.w(TAG, "Proxy not attached to service");
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return false;
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}
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/**
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* Helper for converting a state to a string.
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*
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* For debug use only - strings are not internationalized.
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*
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* @hide
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*/
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public static String stateToString(int state) {
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switch (state) {
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case STATE_DISCONNECTED:
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return "disconnected";
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case STATE_CONNECTING:
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return "connecting";
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case STATE_CONNECTED:
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return "connected";
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case STATE_DISCONNECTING:
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return "disconnecting";
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case STATE_PLAYING:
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return "playing";
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case STATE_NOT_PLAYING:
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return "not playing";
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default:
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return "<unknown state " + state + ">";
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}
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}
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private boolean isEnabled() {
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return mAdapter.getState() == BluetoothAdapter.STATE_ON;
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}
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private static boolean isValidDevice(BluetoothDevice device) {
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return device != null && BluetoothAdapter.checkBluetoothAddress(device.getAddress());
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}
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private static void log(String msg) {
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Log.d(TAG, msg);
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}
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}
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