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 17 package android.bluetooth; 18 19 import android.annotation.SdkConstant; 20 import android.annotation.SdkConstant.SdkConstantType; 21 import android.content.ComponentName; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.content.ServiceConnection; 25 import android.os.IBinder; 26 import android.os.RemoteException; 27 import android.os.ServiceManager; 28 import android.util.Log; 29 30 import java.util.ArrayList; 31 import 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 */ 44 public 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 */ BluetoothPan(Context context, ServiceListener l)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 Log.d(TAG, "BluetoothPan() call bindService"); 141 if (!context.bindService(new Intent(IBluetoothPan.class.getName()), 142 mConnection, 0)) { 143 Log.e(TAG, "Could not bind to Bluetooth HID Service"); 144 } 145 Log.d(TAG, "BluetoothPan(), bindService called"); 146 } 147 close()148 /*package*/ void close() { 149 if (VDBG) log("close()"); 150 if (mConnection != null) { 151 mContext.unbindService(mConnection); 152 mConnection = null; 153 } 154 mServiceListener = null; 155 try { 156 mAdapter.getBluetoothManager().unregisterStateChangeCallback(mStateChangeCallback); 157 } catch (RemoteException re) { 158 Log.w(TAG,"Unable to register BluetoothStateChangeCallback",re); 159 } 160 } 161 finalize()162 protected void finalize() { 163 close(); 164 } 165 166 private IBluetoothStateChangeCallback mStateChangeCallback = new IBluetoothStateChangeCallback.Stub() { 167 168 @Override 169 public void onBluetoothStateChange(boolean on) throws RemoteException { 170 //Handle enable request to bind again. 171 if (on) { 172 Log.d(TAG, "onBluetoothStateChange(on) call bindService"); 173 if (!mContext.bindService(new Intent(IBluetoothPan.class.getName()), 174 mConnection, 0)) { 175 Log.e(TAG, "Could not bind to Bluetooth HID Service"); 176 } 177 Log.d(TAG, "BluetoothPan(), bindService called"); 178 } else { 179 if (VDBG) Log.d(TAG,"Unbinding service..."); 180 synchronized (mConnection) { 181 try { 182 mPanService = null; 183 mContext.unbindService(mConnection); 184 } catch (Exception re) { 185 Log.e(TAG,"",re); 186 } 187 } 188 } 189 } 190 }; 191 192 /** 193 * Initiate connection to a profile of the remote bluetooth device. 194 * 195 * <p> This API returns false in scenarios like the profile on the 196 * device is already connected or Bluetooth is not turned on. 197 * When this API returns true, it is guaranteed that 198 * connection state intent for the profile will be broadcasted with 199 * the state. Users can get the connection state of the profile 200 * from this intent. 201 * 202 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 203 * permission. 204 * 205 * @param device Remote Bluetooth Device 206 * @return false on immediate error, 207 * true otherwise 208 * @hide 209 */ connect(BluetoothDevice device)210 public boolean connect(BluetoothDevice device) { 211 if (DBG) log("connect(" + device + ")"); 212 if (mPanService != null && isEnabled() && 213 isValidDevice(device)) { 214 try { 215 return mPanService.connect(device); 216 } catch (RemoteException e) { 217 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 218 return false; 219 } 220 } 221 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 222 return false; 223 } 224 225 /** 226 * Initiate disconnection from a profile 227 * 228 * <p> This API will return false in scenarios like the profile on the 229 * Bluetooth device is not in connected state etc. When this API returns, 230 * true, it is guaranteed that the connection state change 231 * intent will be broadcasted with the state. Users can get the 232 * disconnection state of the profile from this intent. 233 * 234 * <p> If the disconnection is initiated by a remote device, the state 235 * will transition from {@link #STATE_CONNECTED} to 236 * {@link #STATE_DISCONNECTED}. If the disconnect is initiated by the 237 * host (local) device the state will transition from 238 * {@link #STATE_CONNECTED} to state {@link #STATE_DISCONNECTING} to 239 * state {@link #STATE_DISCONNECTED}. The transition to 240 * {@link #STATE_DISCONNECTING} can be used to distinguish between the 241 * two scenarios. 242 * 243 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 244 * permission. 245 * 246 * @param device Remote Bluetooth Device 247 * @return false on immediate error, 248 * true otherwise 249 * @hide 250 */ disconnect(BluetoothDevice device)251 public boolean disconnect(BluetoothDevice device) { 252 if (DBG) log("disconnect(" + device + ")"); 253 if (mPanService != null && isEnabled() && 254 isValidDevice(device)) { 255 try { 256 return mPanService.disconnect(device); 257 } catch (RemoteException e) { 258 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 259 return false; 260 } 261 } 262 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 263 return false; 264 } 265 266 /** 267 * {@inheritDoc} 268 */ getConnectedDevices()269 public List<BluetoothDevice> getConnectedDevices() { 270 if (VDBG) log("getConnectedDevices()"); 271 if (mPanService != null && isEnabled()) { 272 try { 273 return mPanService.getConnectedDevices(); 274 } catch (RemoteException e) { 275 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 276 return new ArrayList<BluetoothDevice>(); 277 } 278 } 279 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 280 return new ArrayList<BluetoothDevice>(); 281 } 282 283 /** 284 * {@inheritDoc} 285 */ getDevicesMatchingConnectionStates(int[] states)286 public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { 287 if (VDBG) log("getDevicesMatchingStates()"); 288 if (mPanService != null && isEnabled()) { 289 try { 290 return mPanService.getDevicesMatchingConnectionStates(states); 291 } catch (RemoteException e) { 292 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 293 return new ArrayList<BluetoothDevice>(); 294 } 295 } 296 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 297 return new ArrayList<BluetoothDevice>(); 298 } 299 300 /** 301 * {@inheritDoc} 302 */ getConnectionState(BluetoothDevice device)303 public int getConnectionState(BluetoothDevice device) { 304 if (VDBG) log("getState(" + device + ")"); 305 if (mPanService != null && isEnabled() 306 && isValidDevice(device)) { 307 try { 308 return mPanService.getConnectionState(device); 309 } catch (RemoteException e) { 310 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 311 return BluetoothProfile.STATE_DISCONNECTED; 312 } 313 } 314 if (mPanService == null) Log.w(TAG, "Proxy not attached to service"); 315 return BluetoothProfile.STATE_DISCONNECTED; 316 } 317 setBluetoothTethering(boolean value)318 public void setBluetoothTethering(boolean value) { 319 if (DBG) log("setBluetoothTethering(" + value + ")"); 320 try { 321 mPanService.setBluetoothTethering(value); 322 } catch (RemoteException e) { 323 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 324 } 325 } 326 isTetheringOn()327 public boolean isTetheringOn() { 328 if (VDBG) log("isTetheringOn()"); 329 try { 330 return mPanService.isTetheringOn(); 331 } catch (RemoteException e) { 332 Log.e(TAG, "Stack:" + Log.getStackTraceString(new Throwable())); 333 } 334 return false; 335 } 336 337 private ServiceConnection mConnection = new ServiceConnection() { 338 public void onServiceConnected(ComponentName className, IBinder service) { 339 if (DBG) Log.d(TAG, "BluetoothPAN Proxy object connected"); 340 mPanService = IBluetoothPan.Stub.asInterface(service); 341 342 if (mServiceListener != null) { 343 mServiceListener.onServiceConnected(BluetoothProfile.PAN, 344 BluetoothPan.this); 345 } 346 } 347 public void onServiceDisconnected(ComponentName className) { 348 if (DBG) Log.d(TAG, "BluetoothPAN Proxy object disconnected"); 349 mPanService = null; 350 if (mServiceListener != null) { 351 mServiceListener.onServiceDisconnected(BluetoothProfile.PAN); 352 } 353 } 354 }; 355 isEnabled()356 private boolean isEnabled() { 357 if (mAdapter.getState() == BluetoothAdapter.STATE_ON) return true; 358 return false; 359 } 360 isValidDevice(BluetoothDevice device)361 private boolean isValidDevice(BluetoothDevice device) { 362 if (device == null) return false; 363 364 if (BluetoothAdapter.checkBluetoothAddress(device.getAddress())) return true; 365 return false; 366 } 367 log(String msg)368 private static void log(String msg) { 369 Log.d(TAG, msg); 370 } 371 } 372