/*
* 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.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.RemoteException;
import android.os.IBinder;
import android.util.Log;
/**
* The Android Bluetooth API is not finalized, and *will* change. Use at your
* own risk.
*
* Public API for controlling the Bluetooth Pbap Service. This includes
* Bluetooth Phone book Access profile.
* BluetoothPbap is a proxy object for controlling the Bluetooth Pbap
* Service via IPC.
*
* Creating a BluetoothPbap object will create a binding with the
* BluetoothPbap service. Users of this object should call close() when they
* are finished with the BluetoothPbap, so that this proxy object can unbind
* from the service.
*
* This BluetoothPbap object is not immediately bound to the
* BluetoothPbap service. Use the ServiceListener interface to obtain a
* notification when it is bound, this is especially important if you wish to
* immediately call methods on BluetoothPbap after construction.
*
* Android only supports one connected Bluetooth Pce at a time.
*
* @hide
*/
public class BluetoothPbap {
private static final String TAG = "BluetoothPbap";
private static final boolean DBG = true;
private static final boolean VDBG = false;
/** int extra for PBAP_STATE_CHANGED_ACTION */
public static final String PBAP_STATE =
"android.bluetooth.pbap.intent.PBAP_STATE";
/** int extra for PBAP_STATE_CHANGED_ACTION */
public static final String PBAP_PREVIOUS_STATE =
"android.bluetooth.pbap.intent.PBAP_PREVIOUS_STATE";
/** Indicates the state of a pbap connection state has changed.
* This intent will always contain PBAP_STATE, PBAP_PREVIOUS_STATE and
* BluetoothIntent.ADDRESS extras.
*/
public static final String PBAP_STATE_CHANGED_ACTION =
"android.bluetooth.pbap.intent.action.PBAP_STATE_CHANGED";
private IBluetoothPbap 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;
/** No client currently connected */
public static final int STATE_DISCONNECTED = 0;
/** Connection attempt in progress */
public static final int STATE_CONNECTING = 1;
/** Client is currently connected */
public static final int STATE_CONNECTED = 2;
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;
/**
* An interface for notifying Bluetooth PCE IPC clients when they have
* been connected to the BluetoothPbap service.
*/
public interface ServiceListener {
/**
* Called to notify the client when this proxy object has been
* connected to the BluetoothPbap service. Clients must wait for
* this callback before making IPC calls on the BluetoothPbap
* service.
*/
public void onServiceConnected(BluetoothPbap proxy);
/**
* Called to notify the client that this proxy object has been
* disconnected from the BluetoothPbap service. Clients must not
* make IPC calls on the BluetoothPbap service after this callback.
* This callback will currently only occur if the application hosting
* the BluetoothPbap service, but may be called more often in future.
*/
public void onServiceDisconnected();
}
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 BluetoothPbap proxy object.
*/
public BluetoothPbap(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(IBluetoothPbap.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 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 BluetoothPbap 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;
}
/**
* Get the current state of the BluetoothPbap service.
* @return One of the STATE_ return codes, or STATE_ERROR if this proxy
* object is currently not connected to the Pbap service.
*/
public int getState() {
if (VDBG) log("getState()");
if (mService != null) {
try {
return mService.getState();
} catch (RemoteException e) {Log.e(TAG, e.toString());}
} else {
Log.w(TAG, "Proxy not attached to service");
if (DBG) log(Log.getStackTraceString(new Throwable()));
}
return BluetoothPbap.STATE_ERROR;
}
/**
* Get the currently connected remote Bluetooth device (PCE).
* @return The remote Bluetooth device, or null if not in connected or
* connecting state, or if this proxy object is not connected to
* the Pbap service.
*/
public BluetoothDevice getClient() {
if (VDBG) log("getClient()");
if (mService != null) {
try {
return mService.getClient();
} catch (RemoteException e) {Log.e(TAG, e.toString());}
} else {
Log.w(TAG, "Proxy not attached to service");
if (DBG) log(Log.getStackTraceString(new Throwable()));
}
return null;
}
/**
* Returns true if the specified Bluetooth device is connected (does not
* include connecting). Returns false if not connected, or if this proxy
* object is not currently connected to the Pbap service.
*/
public boolean isConnected(BluetoothDevice device) {
if (VDBG) log("isConnected(" + device + ")");
if (mService != null) {
try {
return mService.isConnected(device);
} catch (RemoteException e) {Log.e(TAG, e.toString());}
} else {
Log.w(TAG, "Proxy not attached to service");
if (DBG) log(Log.getStackTraceString(new Throwable()));
}
return false;
}
/**
* Disconnects the current Pbap client (PCE). Currently this call blocks,
* it may soon be made asynchronous. Returns false if this proxy object is
* not currently connected to the Pbap service.
*/
public boolean disconnect() {
if (DBG) log("disconnect()");
if (mService != null) {
try {
mService.disconnect();
return true;
} catch (RemoteException e) {Log.e(TAG, e.toString());}
} else {
Log.w(TAG, "Proxy not attached to service");
if (DBG) log(Log.getStackTraceString(new Throwable()));
}
return false;
}
/**
* Check class bits for possible PBAP support.
* This is a simple heuristic that tries to guess if a device with the
* given class bits might support PBAP. It is not accurate for all
* devices. It tries to err on the side of false positives.
* @return True if this device might support PBAP.
*/
public static boolean doesClassMatchSink(BluetoothClass btClass) {
// TODO optimize the rule
switch (btClass.getDeviceClass()) {
case BluetoothClass.Device.COMPUTER_DESKTOP:
case BluetoothClass.Device.COMPUTER_LAPTOP:
case BluetoothClass.Device.COMPUTER_SERVER:
case BluetoothClass.Device.COMPUTER_UNCATEGORIZED:
return true;
default:
return false;
}
}
private final ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
if (DBG) log("Proxy object connected");
mService = IBluetoothPbap.Stub.asInterface(service);
if (mServiceListener != null) {
mServiceListener.onServiceConnected(BluetoothPbap.this);
}
}
public void onServiceDisconnected(ComponentName className) {
if (DBG) log("Proxy object disconnected");
mService = null;
if (mServiceListener != null) {
mServiceListener.onServiceDisconnected();
}
}
};
private static void log(String msg) {
Log.d(TAG, msg);
}
}
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