/*
* 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.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
* profile.
*
*<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 = true;
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.acrcp-controller.profile.action.CONNECTION_STATE_CHANGED";
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");
}
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);
}
}
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