/*
* 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.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 APIs to control the Bluetooth Pan
* Profile.
*
*<p>BluetoothPan is a proxy object for controlling the Bluetooth
* Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get
* the BluetoothPan proxy object.
*
*<p>Each method is protected with its appropriate permission.
*@hide
*/
public final class BluetoothPan implements BluetoothProfile {
private static final String TAG = "BluetoothPan";
private static final boolean DBG = true;
private static final boolean VDBG = false;
/**
* Intent used to broadcast the change in connection state of the Pan
* profile.
*
* <p>This intent will have 4 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>
* <li> {@link #EXTRA_LOCAL_ROLE} - Which local role the remote device is
* bound to. </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> {@link #EXTRA_LOCAL_ROLE} can be one of {@link #LOCAL_NAP_ROLE} or
* {@link #LOCAL_PANU_ROLE}
* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to
* receive.
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String ACTION_CONNECTION_STATE_CHANGED =
"android.bluetooth.pan.profile.action.CONNECTION_STATE_CHANGED";
/**
* Extra for {@link #ACTION_CONNECTION_STATE_CHANGED} intent
* The local role of the PAN profile that the remote device is bound to.
* It can be one of {@link #LOCAL_NAP_ROLE} or {@link #LOCAL_PANU_ROLE}.
*/
public static final String EXTRA_LOCAL_ROLE = "android.bluetooth.pan.extra.LOCAL_ROLE";
public static final int PAN_ROLE_NONE = 0;
/**
* The local device is acting as a Network Access Point.
*/
public static final int LOCAL_NAP_ROLE = 1;
public static final int REMOTE_NAP_ROLE = 1;
/**
* The local device is acting as a PAN User.
*/
public static final int LOCAL_PANU_ROLE = 2;
public static final int REMOTE_PANU_ROLE = 2;
/**
* Return codes for the connect and disconnect Bluez / Dbus calls.
* @hide
*/
public static final int PAN_DISCONNECT_FAILED_NOT_CONNECTED = 1000;
/**
* @hide
*/
public static final int PAN_CONNECT_FAILED_ALREADY_CONNECTED = 1001;
/**
* @hide
*/
public static final int PAN_CONNECT_FAILED_ATTEMPT_FAILED = 1002;
/**
* @hide
*/
public static final int PAN_OPERATION_GENERIC_FAILURE = 1003;
/**
* @hide
*/
public static final int PAN_OPERATION_SUCCESS = 1004;
private Context mContext;
private ServiceListener mServiceListener;
private BluetoothAdapter mAdapter;
private IBluetoothPan mPanService;
/**
* Create a BluetoothPan proxy object for interacting with the local
* Bluetooth Service which handles the Pan profile
*
*/
/*package*/ BluetoothPan(Context context, ServiceListener l) {
mContext = context;
mServiceListener = l;
mAdapter = BluetoothAdapter.getDefaultAdapter();
try {
mAdapter.getBluetoothManager().registerStateChangeCallback(mStateChangeCallback);
} catch (RemoteException re) {
Log.w(TAG,"Unable to register BluetoothStateChangeCallback",re);
}
if (VDBG) Log.d(TAG, "BluetoothPan() call bindService");
doBind();
}
boolean doBind() {
Intent intent = new Intent(IBluetoothPan.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 Pan Service with " + intent);
return false;
}
return true;
}
/*package*/ void close() {
if (VDBG) log("close()");
IBluetoothManager mgr = mAdapter.getBluetoothManager();
if (mgr != null) {
try {
mgr.unregisterStateChangeCallback(mStateChangeCallback);
} catch (RemoteException re) {
Log.w(TAG,"Unable to unregister BluetoothStateChangeCallback",re);
}
}
synchronized (mConnection) {
if (mPanService != null) {
try {
mPanService = null;
mContext.unbindService(mConnection);
} catch (Exception re) {
Log.e(TAG,"",re);
}
}
}
mServiceListener = null;
}
protected void finalize() {
close();
}
final private IBluetoothStateChangeCallback mStateChangeCallback = new IBluetoothStateChangeCallback.Stub() {
@Override
public void onBluetoothStateChange(boolean on) {
// Handle enable request to bind again.
Log.d(TAG, "onBluetoothStateChange on: " + on);
if (on) {
try {
if (mPanService == null) {
if (VDBG) Log.d(TAG, "onBluetoothStateChange calling doBind()");
doBind();
}
} catch (IllegalStateException e) {
Log.e(TAG,"onBluetoothStateChange: could not bind to PAN service: ", e);
} catch (SecurityException e) {
Log.e(TAG,"onBluetoothStateChange: could not bind to PAN service: ", e);
}
} else {
if (VDBG) Log.d(TAG,"Unbinding service...");
synchronized (mConnection) {
try {
mPanService = null;
mContext.unbindService(mConnection);
} catch (Exception re) {
Log.e(TAG,"",re);
}
}
}
}
};
/**
* Initiate connection to a profile of the remote bluetooth device.
*
* <p> This API returns false in scenarios like the profile on the
* device is already connected or Bluetooth is not turned on.
* When this API returns true, it is guaranteed that
* connection state intent for the profile will be broadcasted with
* the state. Users can get the connection state of the profile
* from this intent.
*
* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
* permission.
*
* @param device Remote Bluetooth Device
* @return false on immediate error,
* true otherwise
* @hide
*/
public boolean connect(BluetoothDevice device) {
if (DBG) log("connect(" + device + ")");
if (mPanService != null && isEnabled() &&
isValidDevice(device)) {
try {
return mPanService.connect(device);
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
return false;
}
}
if (mPanService == null) Log.w(TAG, "Proxy not attached to service");
return false;
}
/**
* Initiate disconnection from a profile
*
* <p> This API will return false in scenarios like the profile on the
* Bluetooth device is not in connected state etc. When this API returns,
* true, it is guaranteed that the connection state change
* intent will be broadcasted with the state. Users can get the
* disconnection state of the profile from this intent.
*
* <p> If the disconnection is initiated by a remote device, the state
* will transition from {@link #STATE_CONNECTED} to
* {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the
* host (local) device the state will transition from
* {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to
* state {@link #STATE_DISCONNECTED}. The transition to
* {@link #STATE_DISCONNECTING} can be used to distinguish between the
* two scenarios.
*
* <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}
* permission.
*
* @param device Remote Bluetooth Device
* @return false on immediate error,
* true otherwise
* @hide
*/
public boolean disconnect(BluetoothDevice device) {
if (DBG) log("disconnect(" + device + ")");
if (mPanService != null && isEnabled() &&
isValidDevice(device)) {
try {
return mPanService.disconnect(device);
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
return false;
}
}
if (mPanService == null) Log.w(TAG, "Proxy not attached to service");
return false;
}
/**
* {@inheritDoc}
*/
public List<BluetoothDevice> getConnectedDevices() {
if (VDBG) log("getConnectedDevices()");
if (mPanService != null && isEnabled()) {
try {
return mPanService.getConnectedDevices();
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
return new ArrayList<BluetoothDevice>();
}
}
if (mPanService == 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 (mPanService != null && isEnabled()) {
try {
return mPanService.getDevicesMatchingConnectionStates(states);
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
return new ArrayList<BluetoothDevice>();
}
}
if (mPanService == 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 (mPanService != null && isEnabled()
&& isValidDevice(device)) {
try {
return mPanService.getConnectionState(device);
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
return BluetoothProfile.STATE_DISCONNECTED;
}
}
if (mPanService == null) Log.w(TAG, "Proxy not attached to service");
return BluetoothProfile.STATE_DISCONNECTED;
}
public void setBluetoothTethering(boolean value) {
if (DBG) log("setBluetoothTethering(" + value + ")");
if (mPanService != null && isEnabled()) {
try {
mPanService.setBluetoothTethering(value);
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
}
}
}
public boolean isTetheringOn() {
if (VDBG) log("isTetheringOn()");
if (mPanService != null && isEnabled()) {
try {
return mPanService.isTetheringOn();
} catch (RemoteException e) {
Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable()));
}
}
return false;
}
private final ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
if (DBG) Log.d(TAG, "BluetoothPAN Proxy object connected");
mPanService = IBluetoothPan.Stub.asInterface(service);
if (mServiceListener != null) {
mServiceListener.onServiceConnected(BluetoothProfile.PAN,
BluetoothPan.this);
}
}
public void onServiceDisconnected(ComponentName className) {
if (DBG) Log.d(TAG, "BluetoothPAN Proxy object disconnected");
mPanService = null;
if (mServiceListener != null) {
mServiceListener.onServiceDisconnected(BluetoothProfile.PAN);
}
}
};
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);
}
}