/*
* Copyright (C) 2016 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 java.util.List;
import java.util.ArrayList;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.RemoteException;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
/**
* This class provides the APIs to control the Bluetooth PBAP Client Profile.
*@hide
*/
public final class BluetoothPbapClient implements BluetoothProfile {
private static final String TAG = "BluetoothPbapClient";
private static final boolean DBG = false;
private static final boolean VDBG = false;
public static final String ACTION_CONNECTION_STATE_CHANGED =
"android.bluetooth.pbap.profile.action.CONNECTION_STATE_CHANGED";
private IBluetoothPbapClient mService;
private final Context mContext;
private ServiceListener mServiceListener;
private BluetoothAdapter mAdapter;
/** There was an error trying to obtain the state */
public static final int STATE_ERROR = -1;
public static final int RESULT_FAILURE = 0;
public static final int RESULT_SUCCESS = 1;
/** Connection canceled before completion. */
public static final int RESULT_CANCELED = 2;
final private IBluetoothStateChangeCallback mBluetoothStateChangeCallback =
new IBluetoothStateChangeCallback.Stub() {
public void onBluetoothStateChange(boolean up) {
if (DBG) {
Log.d(TAG, "onBluetoothStateChange: PBAP CLIENT 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 BluetoothPbapClient proxy object.
*/
BluetoothPbapClient(Context context, ServiceListener l) {
if (DBG) {
Log.d(TAG, "Create BluetoothPbapClient proxy object");
}
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();
}
private boolean doBind() {
Intent intent = new Intent(IBluetoothPbapClient.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 PBAP Client Service with " + intent);
return false;
}
return true;
}
protected void finalize() throws Throwable {
try {
close();
} finally {
super.finalize();
}
}
/**
* Close the connection to the backing service.
* Other public functions of BluetoothPbapClient will return default error
* results once close() has been called. Multiple invocations of close()
* are ok.
*/
public synchronized void close() {
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);
}
}
}
mServiceListener = null;
}
/**
* Initiate connection.
* Upon successful connection to remote PBAP server the Client will
* attempt to automatically download the users phonebook and call log.
*
* @param device a remote device we want connect to
* @return <code>true</code> if command has been issued successfully;
* <code>false</code> otherwise;
*/
public boolean connect(BluetoothDevice device) {
if (DBG) {
log("connect(" + device + ") for PBAP Client.");
}
if (mService != null && isEnabled() && isValidDevice(device)) {
try {
return mService.connect(device);
} catch (RemoteException e) {
Log.e(TAG, Log.getStackTraceString(new Throwable()));
return false;
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return false;
}
/**
* Initiate disconnect.
*
* @param device Remote Bluetooth Device
* @return false on error,
* true otherwise
*/
public boolean disconnect(BluetoothDevice device) {
if (DBG) {
log("disconnect(" + device + ")" + new Exception() );
}
if (mService != null && isEnabled() && isValidDevice(device)) {
try {
mService.disconnect(device);
return true;
} catch (RemoteException e) {
Log.e(TAG, Log.getStackTraceString(new Throwable()));
return false;
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return false;
}
/**
* Get the list of connected devices.
* Currently at most one.
*
* @return list of connected devices
*/
@Override
public List<BluetoothDevice> getConnectedDevices() {
if (DBG) {
log("getConnectedDevices()");
}
if (mService != null && isEnabled()) {
try {
return mService.getConnectedDevices();
} catch (RemoteException e) {
Log.e(TAG, Log.getStackTraceString(new Throwable()));
return new ArrayList<BluetoothDevice>();
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return new ArrayList<BluetoothDevice>();
}
/**
* Get the list of devices matching specified states. Currently at most one.
*
* @return list of matching devices
*/
@Override
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, Log.getStackTraceString(new Throwable()));
return new ArrayList<BluetoothDevice>();
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return new ArrayList<BluetoothDevice>();
}
/**
* Get connection state of device
*
* @return device connection state
*/
@Override
public int getConnectionState(BluetoothDevice device) {
if (DBG) {
log("getConnectionState(" + device + ")");
}
if (mService != null && isEnabled() && isValidDevice(device)) {
try {
return mService.getConnectionState(device);
} catch (RemoteException e) {
Log.e(TAG, Log.getStackTraceString(new Throwable()));
return BluetoothProfile.STATE_DISCONNECTED;
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return BluetoothProfile.STATE_DISCONNECTED;
}
private final ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
if (DBG) {
log("Proxy object connected");
}
mService = IBluetoothPbapClient.Stub.asInterface(Binder.allowBlocking(service));
if (mServiceListener != null) {
mServiceListener.onServiceConnected(BluetoothProfile.PBAP_CLIENT, BluetoothPbapClient.this);
}
}
public void onServiceDisconnected(ComponentName className) {
if (DBG) {
log("Proxy object disconnected");
}
mService = null;
if (mServiceListener != null) {
mServiceListener.onServiceDisconnected(BluetoothProfile.PBAP_CLIENT);
}
}
};
private static void log(String msg) {
Log.d(TAG, msg);
}
private boolean isEnabled() {
BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
if (adapter != null && adapter.getState() == BluetoothAdapter.STATE_ON) {
return true;
}
log("Bluetooth is Not enabled");
return false;
}
private boolean isValidDevice(BluetoothDevice device) {
if (device == null) {
return false;
}
if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) {
return true;
}
return false;
}
/**
* Set priority of the profile
*
* <p> The device should already be paired.
* Priority can be one of {@link #PRIORITY_ON} or
* {@link #PRIORITY_OFF},
*
* @param device Paired bluetooth device
* @param priority
* @return true if priority is set, false on error
*/
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, 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}
*
* @param device Bluetooth device
* @return priority of the device
*/
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, Log.getStackTraceString(new Throwable()));
return PRIORITY_OFF;
}
}
if (mService == null) {
Log.w(TAG, "Proxy not attached to service");
}
return PRIORITY_OFF;
}
}