BluetoothPan.java revision 221ea892dcc661bd07d6f36ff012edca2c48aed4
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.bluetooth; 18 19import android.annotation.SdkConstant; 20import android.annotation.SdkConstant.SdkConstantType; 21import android.content.ComponentName; 22import android.content.Context; 23import android.content.Intent; 24import android.content.ServiceConnection; 25import android.os.IBinder; 26import android.os.RemoteException; 27import android.os.ServiceManager; 28import android.util.Log; 29 30import java.util.ArrayList; 31import java.util.List; 32 33/** 34 * This class provides the APIs to control the Bluetooth Pan 35 * Profile. 36 * 37 *<p>BluetoothPan is a proxy object for controlling the Bluetooth 38 * Service via IPC. Use {@link BluetoothAdapter#getProfileProxy} to get 39 * the BluetoothPan proxy object. 40 * 41 *<p>Each method is protected with its appropriate permission. 42 *@hide 43 */ 44public final class BluetoothPan implements BluetoothProfile { 45 private static final String TAG = "BluetoothPan"; 46 private static final boolean DBG = true; 47 private static final boolean VDBG = false; 48 49 /** 50 * Intent used to broadcast the change in connection state of the Pan 51 * profile. 52 * 53 * <p>This intent will have 4 extras: 54 * <ul> 55 * <li> {@link #EXTRA_STATE} - The current state of the profile. </li> 56 * <li> {@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.</li> 57 * <li> {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. </li> 58 * <li> {@link #EXTRA_LOCAL_ROLE} - Which local role the remote device is 59 * bound to. </li> 60 * </ul> 61 * 62 * <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of 63 * {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, 64 * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}. 65 * 66 * <p> {@link #EXTRA_LOCAL_ROLE} can be one of {@link #LOCAL_NAP_ROLE} or 67 * {@link #LOCAL_PANU_ROLE} 68 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to 69 * receive. 70 */ 71 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 72 public static final String ACTION_CONNECTION_STATE_CHANGED = 73 "android.bluetooth.pan.profile.action.CONNECTION_STATE_CHANGED"; 74 75 /** 76 * Extra for {@link #ACTION_CONNECTION_STATE_CHANGED} intent 77 * The local role of the PAN profile that the remote device is bound to. 78 * It can be one of {@link #LOCAL_NAP_ROLE} or {@link #LOCAL_PANU_ROLE}. 79 */ 80 public static final String EXTRA_LOCAL_ROLE = "android.bluetooth.pan.extra.LOCAL_ROLE"; 81 82 public static final int PAN_ROLE_NONE = 0; 83 /** 84 * The local device is acting as a Network Access Point. 85 */ 86 public static final int LOCAL_NAP_ROLE = 1; 87 public static final int REMOTE_NAP_ROLE = 1; 88 89 /** 90 * The local device is acting as a PAN User. 91 */ 92 public static final int LOCAL_PANU_ROLE = 2; 93 public static final int REMOTE_PANU_ROLE = 2; 94 95 /** 96 * Return codes for the connect and disconnect Bluez / Dbus calls. 97 * @hide 98 */ 99 public static final int PAN_DISCONNECT_FAILED_NOT_CONNECTED = 1000; 100 101 /** 102 * @hide 103 */ 104 public static final int PAN_CONNECT_FAILED_ALREADY_CONNECTED = 1001; 105 106 /** 107 * @hide 108 */ 109 public static final int PAN_CONNECT_FAILED_ATTEMPT_FAILED = 1002; 110 111 /** 112 * @hide 113 */ 114 public static final int PAN_OPERATION_GENERIC_FAILURE = 1003; 115 116 /** 117 * @hide 118 */ 119 public static final int PAN_OPERATION_SUCCESS = 1004; 120 121 private Context mContext; 122 private ServiceListener mServiceListener; 123 private BluetoothAdapter mAdapter; 124 private IBluetoothPan mPanService; 125 126 /** 127 * Create a BluetoothPan proxy object for interacting with the local 128 * Bluetooth Service which handles the Pan profile 129 * 130 */ 131 /*package*/ BluetoothPan(Context context, ServiceListener l) { 132 mContext = context; 133 mServiceListener = l; 134 mAdapter = BluetoothAdapter.getDefaultAdapter(); 135 try { 136 mAdapter.getBluetoothManager().registerStateChangeCallback(mStateChangeCallback); 137 } catch (RemoteException re) { 138 Log.w(TAG,"Unable to register BluetoothStateChangeCallback",re); 139 } 140 if (VDBG) Log.d(TAG, "BluetoothPan() call bindService"); 141 doBind(); 142 if (VDBG) Log.d(TAG, "BluetoothPan(), bindService called"); 143 } 144 145 boolean doBind() { 146 Intent intent = new Intent(IBluetoothPan.class.getName()); 147 ComponentName comp = intent.resolveSystemService(mContext.getPackageManager(), 0); 148 intent.setComponent(comp); 149 if (comp == null || !mContext.bindService(intent, mConnection, 0)) { 150 Log.e(TAG, "Could not bind to Bluetooth Pan Service with " + intent); 151 return false; 152 } 153 return true; 154 } 155 156 /*package*/ void close() { 157 if (VDBG) log("close()"); 158 if (mConnection != null) { 159 mContext.unbindService(mConnection); 160 mConnection = null; 161 } 162 mServiceListener = null; 163 try { 164 mAdapter.getBluetoothManager().unregisterStateChangeCallback(mStateChangeCallback); 165 } catch (RemoteException re) { 166 Log.w(TAG,"Unable to register BluetoothStateChangeCallback",re); 167 } 168 } 169 170 protected void finalize() { 171 close(); 172 } 173 174 private IBluetoothStateChangeCallback mStateChangeCallback = new IBluetoothStateChangeCallback.Stub() { 175 176 @Override 177 public void onBluetoothStateChange(boolean on) throws RemoteException { 178 //Handle enable request to bind again. 179 if (on) { 180 Log.d(TAG, "onBluetoothStateChange(on) call bindService"); 181 doBind(); 182 if (VDBG) Log.d(TAG, "BluetoothPan(), bindService called"); 183 } else { 184 if (VDBG) Log.d(TAG,"Unbinding service..."); 185 synchronized (mConnection) { 186 try { 187 mPanService = null; 188 mContext.unbindService(mConnection); 189 } catch (Exception re) { 190 Log.e(TAG,"",re); 191 } 192 } 193 } 194 } 195 }; 196 197 /** 198 * Initiate connection to a profile of the remote bluetooth device. 199 * 200 * <p> This API returns false in scenarios like the profile on the 201 * device is already connected or Bluetooth is not turned on. 202 * When this API returns true, it is guaranteed that 203 * connection state intent for the profile will be broadcasted with 204 * the state. Users can get the connection state of the profile 205 * from this intent. 206 * 207 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 208 * permission. 209 * 210 * @param device Remote Bluetooth Device 211 * @return false on immediate error, 212 * true otherwise 213 * @hide 214 */ 215 public boolean connect(BluetoothDevice device) { 216 if (DBG) log("connect(" + device + ")"); 217 if (mPanService != null && isEnabled() && 218 isValidDevice(device)) { 219 try { 220 return mPanService.connect(device); 221 } catch (RemoteException e) { 222 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 223 return false; 224 } 225 } 226 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 227 return false; 228 } 229 230 /** 231 * Initiate disconnection from a profile 232 * 233 * <p> This API will return false in scenarios like the profile on the 234 * Bluetooth device is not in connected state etc. When this API returns, 235 * true, it is guaranteed that the connection state change 236 * intent will be broadcasted with the state. Users can get the 237 * disconnection state of the profile from this intent. 238 * 239 * <p> If the disconnection is initiated by a remote device, the state 240 * will transition from {@link #STATE_CONNECTED} to 241 * {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the 242 * host (local) device the state will transition from 243 * {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to 244 * state {@link #STATE_DISCONNECTED}. The transition to 245 * {@link #STATE_DISCONNECTING} can be used to distinguish between the 246 * two scenarios. 247 * 248 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 249 * permission. 250 * 251 * @param device Remote Bluetooth Device 252 * @return false on immediate error, 253 * true otherwise 254 * @hide 255 */ 256 public boolean disconnect(BluetoothDevice device) { 257 if (DBG) log("disconnect(" + device + ")"); 258 if (mPanService != null && isEnabled() && 259 isValidDevice(device)) { 260 try { 261 return mPanService.disconnect(device); 262 } catch (RemoteException e) { 263 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 264 return false; 265 } 266 } 267 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 268 return false; 269 } 270 271 /** 272 * {@inheritDoc} 273 */ 274 public List<BluetoothDevice> getConnectedDevices() { 275 if (VDBG) log("getConnectedDevices()"); 276 if (mPanService != null && isEnabled()) { 277 try { 278 return mPanService.getConnectedDevices(); 279 } catch (RemoteException e) { 280 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 281 return new ArrayList<BluetoothDevice>(); 282 } 283 } 284 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 285 return new ArrayList<BluetoothDevice>(); 286 } 287 288 /** 289 * {@inheritDoc} 290 */ 291 public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { 292 if (VDBG) log("getDevicesMatchingStates()"); 293 if (mPanService != null && isEnabled()) { 294 try { 295 return mPanService.getDevicesMatchingConnectionStates(states); 296 } catch (RemoteException e) { 297 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 298 return new ArrayList<BluetoothDevice>(); 299 } 300 } 301 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 302 return new ArrayList<BluetoothDevice>(); 303 } 304 305 /** 306 * {@inheritDoc} 307 */ 308 public int getConnectionState(BluetoothDevice device) { 309 if (VDBG) log("getState(" + device + ")"); 310 if (mPanService != null && isEnabled() 311 && isValidDevice(device)) { 312 try { 313 return mPanService.getConnectionState(device); 314 } catch (RemoteException e) { 315 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 316 return BluetoothProfile.STATE_DISCONNECTED; 317 } 318 } 319 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 320 return BluetoothProfile.STATE_DISCONNECTED; 321 } 322 323 public void setBluetoothTethering(boolean value) { 324 if (DBG) log("setBluetoothTethering(" + value + ")"); 325 try { 326 mPanService.setBluetoothTethering(value); 327 } catch (RemoteException e) { 328 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 329 } 330 } 331 332 public boolean isTetheringOn() { 333 if (VDBG) log("isTetheringOn()"); 334 try { 335 return mPanService.isTetheringOn(); 336 } catch (RemoteException e) { 337 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 338 } 339 return false; 340 } 341 342 private ServiceConnection mConnection = new ServiceConnection() { 343 public void onServiceConnected(ComponentName className, IBinder service) { 344 if (DBG) Log.d(TAG, "BluetoothPAN Proxy object connected"); 345 mPanService = IBluetoothPan.Stub.asInterface(service); 346 347 if (mServiceListener != null) { 348 mServiceListener.onServiceConnected(BluetoothProfile.PAN, 349 BluetoothPan.this); 350 } 351 } 352 public void onServiceDisconnected(ComponentName className) { 353 if (DBG) Log.d(TAG, "BluetoothPAN Proxy object disconnected"); 354 mPanService = null; 355 if (mServiceListener != null) { 356 mServiceListener.onServiceDisconnected(BluetoothProfile.PAN); 357 } 358 } 359 }; 360 361 private boolean isEnabled() { 362 if (mAdapter.getState() == BluetoothAdapter.STATE_ON) return true; 363 return false; 364 } 365 366 private boolean isValidDevice(BluetoothDevice device) { 367 if (device == null) return false; 368 369 if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) return true; 370 return false; 371 } 372 373 private static void log(String msg) { 374 Log.d(TAG, msg); 375 } 376} 377