1 /* 2 * Copyright (C) 2009 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.Context; 22 import android.os.Binder; 23 import android.os.Handler; 24 import android.os.IBinder; 25 import android.os.Looper; 26 import android.os.Message; 27 import android.os.ParcelUuid; 28 import android.os.RemoteException; 29 import android.os.ServiceManager; 30 import android.util.Log; 31 import android.util.Pair; 32 33 import java.io.IOException; 34 import java.util.Arrays; 35 import java.util.Collections; 36 import java.util.HashSet; 37 import java.util.LinkedList; 38 import java.util.Random; 39 import java.util.Set; 40 import java.util.UUID; 41 42 /** 43 * Represents the local device Bluetooth adapter. The {@link BluetoothAdapter} 44 * lets you perform fundamental Bluetooth tasks, such as initiate 45 * device discovery, query a list of bonded (paired) devices, 46 * instantiate a {@link BluetoothDevice} using a known MAC address, and create 47 * a {@link BluetoothServerSocket} to listen for connection requests from other 48 * devices. 49 * 50 * <p>To get a {@link BluetoothAdapter} representing the local Bluetooth 51 * adapter, call the static {@link #getDefaultAdapter} method. 52 * Fundamentally, this is your starting point for all 53 * Bluetooth actions. Once you have the local adapter, you can get a set of 54 * {@link BluetoothDevice} objects representing all paired devices with 55 * {@link #getBondedDevices()}; start device discovery with 56 * {@link #startDiscovery()}; or create a {@link BluetoothServerSocket} to 57 * listen for incoming connection requests with 58 * {@link #listenUsingRfcommWithServiceRecord(String,UUID)}. 59 * 60 * <p class="note"><strong>Note:</strong> 61 * Most methods require the {@link android.Manifest.permission#BLUETOOTH} 62 * permission and some also require the 63 * {@link android.Manifest.permission#BLUETOOTH_ADMIN} permission. 64 * 65 * <div class="special reference"> 66 * <h3>Developer Guides</h3> 67 * <p>For more information about using Bluetooth, read the 68 * <a href="{@docRoot}guide/topics/wireless/bluetooth.html">Bluetooth</a> developer guide.</p> 69 * </div> 70 * 71 * {@see BluetoothDevice} 72 * {@see BluetoothServerSocket} 73 */ 74 public final class BluetoothAdapter { 75 private static final String TAG = "BluetoothAdapter"; 76 private static final boolean DBG = false; 77 78 /** 79 * Sentinel error value for this class. Guaranteed to not equal any other 80 * integer constant in this class. Provided as a convenience for functions 81 * that require a sentinel error value, for example: 82 * <p><code>Intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 83 * BluetoothAdapter.ERROR)</code> 84 */ 85 public static final int ERROR = Integer.MIN_VALUE; 86 87 /** 88 * Broadcast Action: The state of the local Bluetooth adapter has been 89 * changed. 90 * <p>For example, Bluetooth has been turned on or off. 91 * <p>Always contains the extra fields {@link #EXTRA_STATE} and {@link 92 * #EXTRA_PREVIOUS_STATE} containing the new and old states 93 * respectively. 94 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 95 */ 96 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 97 public static final String ACTION_STATE_CHANGED = 98 "android.bluetooth.adapter.action.STATE_CHANGED"; 99 100 /** 101 * Used as an int extra field in {@link #ACTION_STATE_CHANGED} 102 * intents to request the current power state. Possible values are: 103 * {@link #STATE_OFF}, 104 * {@link #STATE_TURNING_ON}, 105 * {@link #STATE_ON}, 106 * {@link #STATE_TURNING_OFF}, 107 */ 108 public static final String EXTRA_STATE = 109 "android.bluetooth.adapter.extra.STATE"; 110 /** 111 * Used as an int extra field in {@link #ACTION_STATE_CHANGED} 112 * intents to request the previous power state. Possible values are: 113 * {@link #STATE_OFF}, 114 * {@link #STATE_TURNING_ON}, 115 * {@link #STATE_ON}, 116 * {@link #STATE_TURNING_OFF}, 117 */ 118 public static final String EXTRA_PREVIOUS_STATE = 119 "android.bluetooth.adapter.extra.PREVIOUS_STATE"; 120 121 /** 122 * Indicates the local Bluetooth adapter is off. 123 */ 124 public static final int STATE_OFF = 10; 125 /** 126 * Indicates the local Bluetooth adapter is turning on. However local 127 * clients should wait for {@link #STATE_ON} before attempting to 128 * use the adapter. 129 */ 130 public static final int STATE_TURNING_ON = 11; 131 /** 132 * Indicates the local Bluetooth adapter is on, and ready for use. 133 */ 134 public static final int STATE_ON = 12; 135 /** 136 * Indicates the local Bluetooth adapter is turning off. Local clients 137 * should immediately attempt graceful disconnection of any remote links. 138 */ 139 public static final int STATE_TURNING_OFF = 13; 140 141 /** 142 * Activity Action: Show a system activity that requests discoverable mode. 143 * This activity will also request the user to turn on Bluetooth if it 144 * is not currently enabled. 145 * <p>Discoverable mode is equivalent to {@link 146 * #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. It allows remote devices to see 147 * this Bluetooth adapter when they perform a discovery. 148 * <p>For privacy, Android is not discoverable by default. 149 * <p>The sender of this Intent can optionally use extra field {@link 150 * #EXTRA_DISCOVERABLE_DURATION} to request the duration of 151 * discoverability. Currently the default duration is 120 seconds, and 152 * maximum duration is capped at 300 seconds for each request. 153 * <p>Notification of the result of this activity is posted using the 154 * {@link android.app.Activity#onActivityResult} callback. The 155 * <code>resultCode</code> 156 * will be the duration (in seconds) of discoverability or 157 * {@link android.app.Activity#RESULT_CANCELED} if the user rejected 158 * discoverability or an error has occurred. 159 * <p>Applications can also listen for {@link #ACTION_SCAN_MODE_CHANGED} 160 * for global notification whenever the scan mode changes. For example, an 161 * application can be notified when the device has ended discoverability. 162 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 163 */ 164 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) 165 public static final String ACTION_REQUEST_DISCOVERABLE = 166 "android.bluetooth.adapter.action.REQUEST_DISCOVERABLE"; 167 168 /** 169 * Used as an optional int extra field in {@link 170 * #ACTION_REQUEST_DISCOVERABLE} intents to request a specific duration 171 * for discoverability in seconds. The current default is 120 seconds, and 172 * requests over 300 seconds will be capped. These values could change. 173 */ 174 public static final String EXTRA_DISCOVERABLE_DURATION = 175 "android.bluetooth.adapter.extra.DISCOVERABLE_DURATION"; 176 177 /** 178 * Activity Action: Show a system activity that allows the user to turn on 179 * Bluetooth. 180 * <p>This system activity will return once Bluetooth has completed turning 181 * on, or the user has decided not to turn Bluetooth on. 182 * <p>Notification of the result of this activity is posted using the 183 * {@link android.app.Activity#onActivityResult} callback. The 184 * <code>resultCode</code> 185 * will be {@link android.app.Activity#RESULT_OK} if Bluetooth has been 186 * turned on or {@link android.app.Activity#RESULT_CANCELED} if the user 187 * has rejected the request or an error has occurred. 188 * <p>Applications can also listen for {@link #ACTION_STATE_CHANGED} 189 * for global notification whenever Bluetooth is turned on or off. 190 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 191 */ 192 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) 193 public static final String ACTION_REQUEST_ENABLE = 194 "android.bluetooth.adapter.action.REQUEST_ENABLE"; 195 196 /** 197 * Broadcast Action: Indicates the Bluetooth scan mode of the local Adapter 198 * has changed. 199 * <p>Always contains the extra fields {@link #EXTRA_SCAN_MODE} and {@link 200 * #EXTRA_PREVIOUS_SCAN_MODE} containing the new and old scan modes 201 * respectively. 202 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 203 */ 204 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 205 public static final String ACTION_SCAN_MODE_CHANGED = 206 "android.bluetooth.adapter.action.SCAN_MODE_CHANGED"; 207 208 /** 209 * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} 210 * intents to request the current scan mode. Possible values are: 211 * {@link #SCAN_MODE_NONE}, 212 * {@link #SCAN_MODE_CONNECTABLE}, 213 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, 214 */ 215 public static final String EXTRA_SCAN_MODE = "android.bluetooth.adapter.extra.SCAN_MODE"; 216 /** 217 * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} 218 * intents to request the previous scan mode. Possible values are: 219 * {@link #SCAN_MODE_NONE}, 220 * {@link #SCAN_MODE_CONNECTABLE}, 221 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, 222 */ 223 public static final String EXTRA_PREVIOUS_SCAN_MODE = 224 "android.bluetooth.adapter.extra.PREVIOUS_SCAN_MODE"; 225 226 /** 227 * Indicates that both inquiry scan and page scan are disabled on the local 228 * Bluetooth adapter. Therefore this device is neither discoverable 229 * nor connectable from remote Bluetooth devices. 230 */ 231 public static final int SCAN_MODE_NONE = 20; 232 /** 233 * Indicates that inquiry scan is disabled, but page scan is enabled on the 234 * local Bluetooth adapter. Therefore this device is not discoverable from 235 * remote Bluetooth devices, but is connectable from remote devices that 236 * have previously discovered this device. 237 */ 238 public static final int SCAN_MODE_CONNECTABLE = 21; 239 /** 240 * Indicates that both inquiry scan and page scan are enabled on the local 241 * Bluetooth adapter. Therefore this device is both discoverable and 242 * connectable from remote Bluetooth devices. 243 */ 244 public static final int SCAN_MODE_CONNECTABLE_DISCOVERABLE = 23; 245 246 247 /** 248 * Broadcast Action: The local Bluetooth adapter has started the remote 249 * device discovery process. 250 * <p>This usually involves an inquiry scan of about 12 seconds, followed 251 * by a page scan of each new device to retrieve its Bluetooth name. 252 * <p>Register for {@link BluetoothDevice#ACTION_FOUND} to be notified as 253 * remote Bluetooth devices are found. 254 * <p>Device discovery is a heavyweight procedure. New connections to 255 * remote Bluetooth devices should not be attempted while discovery is in 256 * progress, and existing connections will experience limited bandwidth 257 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 258 * discovery. 259 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 260 */ 261 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 262 public static final String ACTION_DISCOVERY_STARTED = 263 "android.bluetooth.adapter.action.DISCOVERY_STARTED"; 264 /** 265 * Broadcast Action: The local Bluetooth adapter has finished the device 266 * discovery process. 267 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 268 */ 269 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 270 public static final String ACTION_DISCOVERY_FINISHED = 271 "android.bluetooth.adapter.action.DISCOVERY_FINISHED"; 272 273 /** 274 * Broadcast Action: The local Bluetooth adapter has changed its friendly 275 * Bluetooth name. 276 * <p>This name is visible to remote Bluetooth devices. 277 * <p>Always contains the extra field {@link #EXTRA_LOCAL_NAME} containing 278 * the name. 279 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 280 */ 281 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 282 public static final String ACTION_LOCAL_NAME_CHANGED = 283 "android.bluetooth.adapter.action.LOCAL_NAME_CHANGED"; 284 /** 285 * Used as a String extra field in {@link #ACTION_LOCAL_NAME_CHANGED} 286 * intents to request the local Bluetooth name. 287 */ 288 public static final String EXTRA_LOCAL_NAME = "android.bluetooth.adapter.extra.LOCAL_NAME"; 289 290 /** 291 * Intent used to broadcast the change in connection state of the local 292 * Bluetooth adapter to a profile of the remote device. When the adapter is 293 * not connected to any profiles of any remote devices and it attempts a 294 * connection to a profile this intent will sent. Once connected, this intent 295 * will not be sent for any more connection attempts to any profiles of any 296 * remote device. When the adapter disconnects from the last profile its 297 * connected to of any remote device, this intent will be sent. 298 * 299 * <p> This intent is useful for applications that are only concerned about 300 * whether the local adapter is connected to any profile of any device and 301 * are not really concerned about which profile. For example, an application 302 * which displays an icon to display whether Bluetooth is connected or not 303 * can use this intent. 304 * 305 * <p>This intent will have 3 extras: 306 * {@link #EXTRA_CONNECTION_STATE} - The current connection state. 307 * {@link #EXTRA_PREVIOUS_CONNECTION_STATE}- The previous connection state. 308 * {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. 309 * 310 * {@link #EXTRA_CONNECTION_STATE} or {@link #EXTRA_PREVIOUS_CONNECTION_STATE} 311 * can be any of {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, 312 * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}. 313 * 314 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 315 */ 316 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 317 public static final String ACTION_CONNECTION_STATE_CHANGED = 318 "android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED"; 319 320 /** 321 * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} 322 * 323 * This extra represents the current connection state. 324 */ 325 public static final String EXTRA_CONNECTION_STATE = 326 "android.bluetooth.adapter.extra.CONNECTION_STATE"; 327 328 /** 329 * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} 330 * 331 * This extra represents the previous connection state. 332 */ 333 public static final String EXTRA_PREVIOUS_CONNECTION_STATE = 334 "android.bluetooth.adapter.extra.PREVIOUS_CONNECTION_STATE"; 335 336 /** The profile is in disconnected state */ 337 public static final int STATE_DISCONNECTED = 0; 338 /** The profile is in connecting state */ 339 public static final int STATE_CONNECTING = 1; 340 /** The profile is in connected state */ 341 public static final int STATE_CONNECTED = 2; 342 /** The profile is in disconnecting state */ 343 public static final int STATE_DISCONNECTING = 3; 344 345 /** @hide */ 346 public static final String BLUETOOTH_SERVICE = "bluetooth"; 347 348 private static final int ADDRESS_LENGTH = 17; 349 350 /** 351 * Lazily initialized singleton. Guaranteed final after first object 352 * constructed. 353 */ 354 private static BluetoothAdapter sAdapter; 355 356 private final IBluetooth mService; 357 358 private Handler mServiceRecordHandler; 359 360 /** 361 * Get a handle to the default local Bluetooth adapter. 362 * <p>Currently Android only supports one Bluetooth adapter, but the API 363 * could be extended to support more. This will always return the default 364 * adapter. 365 * @return the default local adapter, or null if Bluetooth is not supported 366 * on this hardware platform 367 */ 368 public static synchronized BluetoothAdapter getDefaultAdapter() { 369 if (sAdapter == null) { 370 IBinder b = ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE); 371 if (b != null) { 372 IBluetooth service = IBluetooth.Stub.asInterface(b); 373 sAdapter = new BluetoothAdapter(service); 374 } 375 } 376 return sAdapter; 377 } 378 379 /** 380 * Use {@link #getDefaultAdapter} to get the BluetoothAdapter instance. 381 * @hide 382 */ 383 public BluetoothAdapter(IBluetooth service) { 384 if (service == null) { 385 throw new IllegalArgumentException("service is null"); 386 } 387 mService = service; 388 mServiceRecordHandler = null; 389 } 390 391 /** 392 * Get a {@link BluetoothDevice} object for the given Bluetooth hardware 393 * address. 394 * <p>Valid Bluetooth hardware addresses must be upper case, in a format 395 * such as "00:11:22:33:AA:BB". The helper {@link #checkBluetoothAddress} is 396 * available to validate a Bluetooth address. 397 * <p>A {@link BluetoothDevice} will always be returned for a valid 398 * hardware address, even if this adapter has never seen that device. 399 * 400 * @param address valid Bluetooth MAC address 401 * @throws IllegalArgumentException if address is invalid 402 */ 403 public BluetoothDevice getRemoteDevice(String address) { 404 return new BluetoothDevice(address); 405 } 406 407 /** 408 * Return true if Bluetooth is currently enabled and ready for use. 409 * <p>Equivalent to: 410 * <code>getBluetoothState() == STATE_ON</code> 411 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 412 * 413 * @return true if the local adapter is turned on 414 */ 415 public boolean isEnabled() { 416 try { 417 return mService.isEnabled(); 418 } catch (RemoteException e) {Log.e(TAG, "", e);} 419 return false; 420 } 421 422 /** 423 * Get the current state of the local Bluetooth adapter. 424 * <p>Possible return values are 425 * {@link #STATE_OFF}, 426 * {@link #STATE_TURNING_ON}, 427 * {@link #STATE_ON}, 428 * {@link #STATE_TURNING_OFF}. 429 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 430 * 431 * @return current state of Bluetooth adapter 432 */ 433 public int getState() { 434 try { 435 return mService.getBluetoothState(); 436 } catch (RemoteException e) {Log.e(TAG, "", e);} 437 return STATE_OFF; 438 } 439 440 /** 441 * Turn on the local Bluetooth adapter—do not use without explicit 442 * user action to turn on Bluetooth. 443 * <p>This powers on the underlying Bluetooth hardware, and starts all 444 * Bluetooth system services. 445 * <p class="caution"><strong>Bluetooth should never be enabled without 446 * direct user consent</strong>. If you want to turn on Bluetooth in order 447 * to create a wireless connection, you should use the {@link 448 * #ACTION_REQUEST_ENABLE} Intent, which will raise a dialog that requests 449 * user permission to turn on Bluetooth. The {@link #enable()} method is 450 * provided only for applications that include a user interface for changing 451 * system settings, such as a "power manager" app.</p> 452 * <p>This is an asynchronous call: it will return immediately, and 453 * clients should listen for {@link #ACTION_STATE_CHANGED} 454 * to be notified of subsequent adapter state changes. If this call returns 455 * true, then the adapter state will immediately transition from {@link 456 * #STATE_OFF} to {@link #STATE_TURNING_ON}, and some time 457 * later transition to either {@link #STATE_OFF} or {@link 458 * #STATE_ON}. If this call returns false then there was an 459 * immediate problem that will prevent the adapter from being turned on - 460 * such as Airplane mode, or the adapter is already turned on. 461 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 462 * permission 463 * 464 * @return true to indicate adapter startup has begun, or false on 465 * immediate error 466 */ 467 public boolean enable() { 468 try { 469 return mService.enable(); 470 } catch (RemoteException e) {Log.e(TAG, "", e);} 471 return false; 472 } 473 474 /** 475 * Turn off the local Bluetooth adapter—do not use without explicit 476 * user action to turn off Bluetooth. 477 * <p>This gracefully shuts down all Bluetooth connections, stops Bluetooth 478 * system services, and powers down the underlying Bluetooth hardware. 479 * <p class="caution"><strong>Bluetooth should never be disabled without 480 * direct user consent</strong>. The {@link #disable()} method is 481 * provided only for applications that include a user interface for changing 482 * system settings, such as a "power manager" app.</p> 483 * <p>This is an asynchronous call: it will return immediately, and 484 * clients should listen for {@link #ACTION_STATE_CHANGED} 485 * to be notified of subsequent adapter state changes. If this call returns 486 * true, then the adapter state will immediately transition from {@link 487 * #STATE_ON} to {@link #STATE_TURNING_OFF}, and some time 488 * later transition to either {@link #STATE_OFF} or {@link 489 * #STATE_ON}. If this call returns false then there was an 490 * immediate problem that will prevent the adapter from being turned off - 491 * such as the adapter already being turned off. 492 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 493 * permission 494 * 495 * @return true to indicate adapter shutdown has begun, or false on 496 * immediate error 497 */ 498 public boolean disable() { 499 try { 500 return mService.disable(true); 501 } catch (RemoteException e) {Log.e(TAG, "", e);} 502 return false; 503 } 504 505 /** 506 * Returns the hardware address of the local Bluetooth adapter. 507 * <p>For example, "00:11:22:AA:BB:CC". 508 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 509 * 510 * @return Bluetooth hardware address as string 511 */ 512 public String getAddress() { 513 try { 514 return mService.getAddress(); 515 } catch (RemoteException e) {Log.e(TAG, "", e);} 516 return null; 517 } 518 519 /** 520 * Get the friendly Bluetooth name of the local Bluetooth adapter. 521 * <p>This name is visible to remote Bluetooth devices. 522 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 523 * 524 * @return the Bluetooth name, or null on error 525 */ 526 public String getName() { 527 try { 528 return mService.getName(); 529 } catch (RemoteException e) {Log.e(TAG, "", e);} 530 return null; 531 } 532 533 /** 534 * Get the UUIDs supported by the local Bluetooth adapter. 535 * 536 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 537 * 538 * @return the UUIDs supported by the local Bluetooth Adapter. 539 * @hide 540 */ 541 public ParcelUuid[] getUuids() { 542 if (getState() != STATE_ON) return null; 543 try { 544 return mService.getUuids(); 545 } catch (RemoteException e) {Log.e(TAG, "", e);} 546 return null; 547 } 548 549 /** 550 * Set the friendly Bluetooth name of the local Bluetooth adapter. 551 * <p>This name is visible to remote Bluetooth devices. 552 * <p>Valid Bluetooth names are a maximum of 248 bytes using UTF-8 553 * encoding, although many remote devices can only display the first 554 * 40 characters, and some may be limited to just 20. 555 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 556 * will return false. After turning on Bluetooth, 557 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 558 * to get the updated value. 559 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 560 * 561 * @param name a valid Bluetooth name 562 * @return true if the name was set, false otherwise 563 */ 564 public boolean setName(String name) { 565 if (getState() != STATE_ON) return false; 566 try { 567 return mService.setName(name); 568 } catch (RemoteException e) {Log.e(TAG, "", e);} 569 return false; 570 } 571 572 /** 573 * Get the current Bluetooth scan mode of the local Bluetooth adapter. 574 * <p>The Bluetooth scan mode determines if the local adapter is 575 * connectable and/or discoverable from remote Bluetooth devices. 576 * <p>Possible values are: 577 * {@link #SCAN_MODE_NONE}, 578 * {@link #SCAN_MODE_CONNECTABLE}, 579 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 580 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 581 * will return {@link #SCAN_MODE_NONE}. After turning on Bluetooth, 582 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 583 * to get the updated value. 584 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 585 * 586 * @return scan mode 587 */ 588 public int getScanMode() { 589 if (getState() != STATE_ON) return SCAN_MODE_NONE; 590 try { 591 return mService.getScanMode(); 592 } catch (RemoteException e) {Log.e(TAG, "", e);} 593 return SCAN_MODE_NONE; 594 } 595 596 /** 597 * Set the Bluetooth scan mode of the local Bluetooth adapter. 598 * <p>The Bluetooth scan mode determines if the local adapter is 599 * connectable and/or discoverable from remote Bluetooth devices. 600 * <p>For privacy reasons, discoverable mode is automatically turned off 601 * after <code>duration</code> seconds. For example, 120 seconds should be 602 * enough for a remote device to initiate and complete its discovery 603 * process. 604 * <p>Valid scan mode values are: 605 * {@link #SCAN_MODE_NONE}, 606 * {@link #SCAN_MODE_CONNECTABLE}, 607 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 608 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 609 * will return false. After turning on Bluetooth, 610 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 611 * to get the updated value. 612 * <p>Requires {@link android.Manifest.permission#WRITE_SECURE_SETTINGS} 613 * <p>Applications cannot set the scan mode. They should use 614 * <code>startActivityForResult( 615 * BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE}) 616 * </code>instead. 617 * 618 * @param mode valid scan mode 619 * @param duration time in seconds to apply scan mode, only used for 620 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE} 621 * @return true if the scan mode was set, false otherwise 622 * @hide 623 */ 624 public boolean setScanMode(int mode, int duration) { 625 if (getState() != STATE_ON) return false; 626 try { 627 return mService.setScanMode(mode, duration); 628 } catch (RemoteException e) {Log.e(TAG, "", e);} 629 return false; 630 } 631 632 /** @hide */ 633 public boolean setScanMode(int mode) { 634 if (getState() != STATE_ON) return false; 635 return setScanMode(mode, 120); 636 } 637 638 /** @hide */ 639 public int getDiscoverableTimeout() { 640 if (getState() != STATE_ON) return -1; 641 try { 642 return mService.getDiscoverableTimeout(); 643 } catch (RemoteException e) {Log.e(TAG, "", e);} 644 return -1; 645 } 646 647 /** @hide */ 648 public void setDiscoverableTimeout(int timeout) { 649 if (getState() != STATE_ON) return; 650 try { 651 mService.setDiscoverableTimeout(timeout); 652 } catch (RemoteException e) {Log.e(TAG, "", e);} 653 } 654 655 /** 656 * Start the remote device discovery process. 657 * <p>The discovery process usually involves an inquiry scan of about 12 658 * seconds, followed by a page scan of each new device to retrieve its 659 * Bluetooth name. 660 * <p>This is an asynchronous call, it will return immediately. Register 661 * for {@link #ACTION_DISCOVERY_STARTED} and {@link 662 * #ACTION_DISCOVERY_FINISHED} intents to determine exactly when the 663 * discovery starts and completes. Register for {@link 664 * BluetoothDevice#ACTION_FOUND} to be notified as remote Bluetooth devices 665 * are found. 666 * <p>Device discovery is a heavyweight procedure. New connections to 667 * remote Bluetooth devices should not be attempted while discovery is in 668 * progress, and existing connections will experience limited bandwidth 669 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 670 * discovery. Discovery is not managed by the Activity, 671 * but is run as a system service, so an application should always call 672 * {@link BluetoothAdapter#cancelDiscovery()} even if it 673 * did not directly request a discovery, just to be sure. 674 * <p>Device discovery will only find remote devices that are currently 675 * <i>discoverable</i> (inquiry scan enabled). Many Bluetooth devices are 676 * not discoverable by default, and need to be entered into a special mode. 677 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 678 * will return false. After turning on Bluetooth, 679 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 680 * to get the updated value. 681 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 682 * 683 * @return true on success, false on error 684 */ 685 public boolean startDiscovery() { 686 if (getState() != STATE_ON) return false; 687 try { 688 return mService.startDiscovery(); 689 } catch (RemoteException e) {Log.e(TAG, "", e);} 690 return false; 691 } 692 693 /** 694 * Cancel the current device discovery process. 695 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 696 * <p>Because discovery is a heavyweight procedure for the Bluetooth 697 * adapter, this method should always be called before attempting to connect 698 * to a remote device with {@link 699 * android.bluetooth.BluetoothSocket#connect()}. Discovery is not managed by 700 * the Activity, but is run as a system service, so an application should 701 * always call cancel discovery even if it did not directly request a 702 * discovery, just to be sure. 703 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 704 * will return false. After turning on Bluetooth, 705 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 706 * to get the updated value. 707 * 708 * @return true on success, false on error 709 */ 710 public boolean cancelDiscovery() { 711 if (getState() != STATE_ON) return false; 712 try { 713 return mService.cancelDiscovery(); 714 } catch (RemoteException e) {Log.e(TAG, "", e);} 715 return false; 716 } 717 718 /** 719 * Return true if the local Bluetooth adapter is currently in the device 720 * discovery process. 721 * <p>Device discovery is a heavyweight procedure. New connections to 722 * remote Bluetooth devices should not be attempted while discovery is in 723 * progress, and existing connections will experience limited bandwidth 724 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 725 * discovery. 726 * <p>Applications can also register for {@link #ACTION_DISCOVERY_STARTED} 727 * or {@link #ACTION_DISCOVERY_FINISHED} to be notified when discovery 728 * starts or completes. 729 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 730 * will return false. After turning on Bluetooth, 731 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 732 * to get the updated value. 733 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 734 * 735 * @return true if discovering 736 */ 737 public boolean isDiscovering() { 738 if (getState() != STATE_ON) return false; 739 try { 740 return mService.isDiscovering(); 741 } catch (RemoteException e) {Log.e(TAG, "", e);} 742 return false; 743 } 744 745 /** 746 * Return the set of {@link BluetoothDevice} objects that are bonded 747 * (paired) to the local adapter. 748 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 749 * will return an empty set. After turning on Bluetooth, 750 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 751 * to get the updated value. 752 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 753 * 754 * @return unmodifiable set of {@link BluetoothDevice}, or null on error 755 */ 756 public Set<BluetoothDevice> getBondedDevices() { 757 if (getState() != STATE_ON) { 758 return toDeviceSet(new String[0]); 759 } 760 try { 761 return toDeviceSet(mService.listBonds()); 762 } catch (RemoteException e) {Log.e(TAG, "", e);} 763 return null; 764 } 765 766 /** 767 * Get the current connection state of the local Bluetooth adapter. 768 * This can be used to check whether the local Bluetooth adapter is connected 769 * to any profile of any other remote Bluetooth Device. 770 * 771 * <p> Use this function along with {@link #ACTION_CONNECTION_STATE_CHANGED} 772 * intent to get the connection state of the adapter. 773 * 774 * @return One of {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTED}, 775 * {@link #STATE_CONNECTING} or {@link #STATE_DISCONNECTED} 776 * 777 * @hide 778 */ 779 public int getConnectionState() { 780 if (getState() != STATE_ON) return BluetoothAdapter.STATE_DISCONNECTED; 781 try { 782 return mService.getAdapterConnectionState(); 783 } catch (RemoteException e) {Log.e(TAG, "getConnectionState:", e);} 784 return BluetoothAdapter.STATE_DISCONNECTED; 785 } 786 787 /** 788 * Get the current connection state of a profile. 789 * This function can be used to check whether the local Bluetooth adapter 790 * is connected to any remote device for a specific profile. 791 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET}, 792 * {@link BluetoothProfile#A2DP}. 793 * 794 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 795 * 796 * <p> Return value can be one of 797 * {@link BluetoothProfile#STATE_DISCONNECTED}, 798 * {@link BluetoothProfile#STATE_CONNECTING}, 799 * {@link BluetoothProfile#STATE_CONNECTED}, 800 * {@link BluetoothProfile#STATE_DISCONNECTING} 801 */ 802 public int getProfileConnectionState(int profile) { 803 if (getState() != STATE_ON) return BluetoothProfile.STATE_DISCONNECTED; 804 try { 805 return mService.getProfileConnectionState(profile); 806 } catch (RemoteException e) { 807 Log.e(TAG, "getProfileConnectionState:", e); 808 } 809 return BluetoothProfile.STATE_DISCONNECTED; 810 } 811 812 /** 813 /** 814 * Picks RFCOMM channels until none are left. 815 * Avoids reserved channels. 816 */ 817 private static class RfcommChannelPicker { 818 private static final int[] RESERVED_RFCOMM_CHANNELS = new int[] { 819 10, // HFAG 820 11, // HSAG 821 12, // OPUSH 822 19, // PBAP 823 }; 824 private static LinkedList<Integer> sChannels; // master list of non-reserved channels 825 private static Random sRandom; 826 827 private final LinkedList<Integer> mChannels; // local list of channels left to try 828 829 private final UUID mUuid; 830 831 public RfcommChannelPicker(UUID uuid) { 832 synchronized (RfcommChannelPicker.class) { 833 if (sChannels == null) { 834 // lazy initialization of non-reserved rfcomm channels 835 sChannels = new LinkedList<Integer>(); 836 for (int i = 1; i <= BluetoothSocket.MAX_RFCOMM_CHANNEL; i++) { 837 sChannels.addLast(new Integer(i)); 838 } 839 for (int reserved : RESERVED_RFCOMM_CHANNELS) { 840 sChannels.remove(new Integer(reserved)); 841 } 842 sRandom = new Random(); 843 } 844 mChannels = (LinkedList<Integer>)sChannels.clone(); 845 } 846 mUuid = uuid; 847 } 848 /* Returns next random channel, or -1 if we're out */ 849 public int nextChannel() { 850 if (mChannels.size() == 0) { 851 return -1; 852 } 853 return mChannels.remove(sRandom.nextInt(mChannels.size())); 854 } 855 } 856 857 /** 858 * Create a listening, secure RFCOMM Bluetooth socket. 859 * <p>A remote device connecting to this socket will be authenticated and 860 * communication on this socket will be encrypted. 861 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 862 * connections from a listening {@link BluetoothServerSocket}. 863 * <p>Valid RFCOMM channels are in range 1 to 30. 864 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 865 * @param channel RFCOMM channel to listen on 866 * @return a listening RFCOMM BluetoothServerSocket 867 * @throws IOException on error, for example Bluetooth not available, or 868 * insufficient permissions, or channel in use. 869 * @hide 870 */ 871 public BluetoothServerSocket listenUsingRfcommOn(int channel) throws IOException { 872 BluetoothServerSocket socket = new BluetoothServerSocket( 873 BluetoothSocket.TYPE_RFCOMM, true, true, channel); 874 int errno = socket.mSocket.bindListen(); 875 if (errno != 0) { 876 try { 877 socket.close(); 878 } catch (IOException e) {} 879 socket.mSocket.throwErrnoNative(errno); 880 } 881 return socket; 882 } 883 884 /** 885 * Create a listening, secure RFCOMM Bluetooth socket with Service Record. 886 * <p>A remote device connecting to this socket will be authenticated and 887 * communication on this socket will be encrypted. 888 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 889 * connections from a listening {@link BluetoothServerSocket}. 890 * <p>The system will assign an unused RFCOMM channel to listen on. 891 * <p>The system will also register a Service Discovery 892 * Protocol (SDP) record with the local SDP server containing the specified 893 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 894 * can use the same UUID to query our SDP server and discover which channel 895 * to connect to. This SDP record will be removed when this socket is 896 * closed, or if this application closes unexpectedly. 897 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 898 * connect to this socket from another device using the same {@link UUID}. 899 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 900 * @param name service name for SDP record 901 * @param uuid uuid for SDP record 902 * @return a listening RFCOMM BluetoothServerSocket 903 * @throws IOException on error, for example Bluetooth not available, or 904 * insufficient permissions, or channel in use. 905 */ 906 public BluetoothServerSocket listenUsingRfcommWithServiceRecord(String name, UUID uuid) 907 throws IOException { 908 return createNewRfcommSocketAndRecord(name, uuid, true, true); 909 } 910 911 /** 912 * Create a listening, insecure RFCOMM Bluetooth socket with Service Record. 913 * <p>The link key is not required to be authenticated, i.e the communication may be 914 * vulnerable to Man In the Middle attacks. For Bluetooth 2.1 devices, 915 * the link will be encrypted, as encryption is mandartory. 916 * For legacy devices (pre Bluetooth 2.1 devices) the link will not 917 * be encrypted. Use {@link #listenUsingRfcommWithServiceRecord}, if an 918 * encrypted and authenticated communication channel is desired. 919 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 920 * connections from a listening {@link BluetoothServerSocket}. 921 * <p>The system will assign an unused RFCOMM channel to listen on. 922 * <p>The system will also register a Service Discovery 923 * Protocol (SDP) record with the local SDP server containing the specified 924 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 925 * can use the same UUID to query our SDP server and discover which channel 926 * to connect to. This SDP record will be removed when this socket is 927 * closed, or if this application closes unexpectedly. 928 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 929 * connect to this socket from another device using the same {@link UUID}. 930 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 931 * @param name service name for SDP record 932 * @param uuid uuid for SDP record 933 * @return a listening RFCOMM BluetoothServerSocket 934 * @throws IOException on error, for example Bluetooth not available, or 935 * insufficient permissions, or channel in use. 936 */ 937 public BluetoothServerSocket listenUsingInsecureRfcommWithServiceRecord(String name, UUID uuid) 938 throws IOException { 939 return createNewRfcommSocketAndRecord(name, uuid, false, false); 940 } 941 942 /** 943 * Create a listening, encrypted, 944 * RFCOMM Bluetooth socket with Service Record. 945 * <p>The link will be encrypted, but the link key is not required to be authenticated 946 * i.e the communication is vulnerable to Man In the Middle attacks. Use 947 * {@link #listenUsingRfcommWithServiceRecord}, to ensure an authenticated link key. 948 * <p> Use this socket if authentication of link key is not possible. 949 * For example, for Bluetooth 2.1 devices, if any of the devices does not have 950 * an input and output capability or just has the ability to display a numeric key, 951 * a secure socket connection is not possible and this socket can be used. 952 * Use {@link #listenUsingInsecureRfcommWithServiceRecord}, if encryption is not required. 953 * For Bluetooth 2.1 devices, the link will be encrypted, as encryption is mandartory. 954 * For more details, refer to the Security Model section 5.2 (vol 3) of 955 * Bluetooth Core Specification version 2.1 + EDR. 956 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 957 * connections from a listening {@link BluetoothServerSocket}. 958 * <p>The system will assign an unused RFCOMM channel to listen on. 959 * <p>The system will also register a Service Discovery 960 * Protocol (SDP) record with the local SDP server containing the specified 961 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 962 * can use the same UUID to query our SDP server and discover which channel 963 * to connect to. This SDP record will be removed when this socket is 964 * closed, or if this application closes unexpectedly. 965 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 966 * connect to this socket from another device using the same {@link UUID}. 967 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 968 * @param name service name for SDP record 969 * @param uuid uuid for SDP record 970 * @return a listening RFCOMM BluetoothServerSocket 971 * @throws IOException on error, for example Bluetooth not available, or 972 * insufficient permissions, or channel in use. 973 * @hide 974 */ 975 public BluetoothServerSocket listenUsingEncryptedRfcommWithServiceRecord( 976 String name, UUID uuid) throws IOException { 977 return createNewRfcommSocketAndRecord(name, uuid, false, true); 978 } 979 980 private BluetoothServerSocket createNewRfcommSocketAndRecord(String name, UUID uuid, 981 boolean auth, boolean encrypt) throws IOException { 982 RfcommChannelPicker picker = new RfcommChannelPicker(uuid); 983 984 BluetoothServerSocket socket; 985 int channel; 986 int errno; 987 while (true) { 988 channel = picker.nextChannel(); 989 990 if (channel == -1) { 991 throw new IOException("No available channels"); 992 } 993 994 socket = new BluetoothServerSocket( 995 BluetoothSocket.TYPE_RFCOMM, auth, encrypt, channel); 996 errno = socket.mSocket.bindListen(); 997 if (errno == 0) { 998 if (DBG) Log.d(TAG, "listening on RFCOMM channel " + channel); 999 break; // success 1000 } else if (errno == BluetoothSocket.EADDRINUSE) { 1001 if (DBG) Log.d(TAG, "RFCOMM channel " + channel + " in use"); 1002 try { 1003 socket.close(); 1004 } catch (IOException e) {} 1005 continue; // try another channel 1006 } else { 1007 try { 1008 socket.close(); 1009 } catch (IOException e) {} 1010 socket.mSocket.throwErrnoNative(errno); // Exception as a result of bindListen() 1011 } 1012 } 1013 1014 int handle = -1; 1015 try { 1016 handle = mService.addRfcommServiceRecord(name, new ParcelUuid(uuid), channel, 1017 new Binder()); 1018 } catch (RemoteException e) {Log.e(TAG, "", e);} 1019 if (handle == -1) { 1020 try { 1021 socket.close(); 1022 } catch (IOException e) {} 1023 throw new IOException("Not able to register SDP record for " + name); 1024 } 1025 1026 if (mServiceRecordHandler == null) { 1027 mServiceRecordHandler = new Handler(Looper.getMainLooper()) { 1028 public void handleMessage(Message msg) { 1029 /* handle socket closing */ 1030 int handle = msg.what; 1031 try { 1032 if (DBG) Log.d(TAG, "Removing service record " + 1033 Integer.toHexString(handle)); 1034 mService.removeServiceRecord(handle); 1035 } catch (RemoteException e) {Log.e(TAG, "", e);} 1036 } 1037 }; 1038 } 1039 socket.setCloseHandler(mServiceRecordHandler, handle); 1040 return socket; 1041 } 1042 1043 1044 /** 1045 * Construct an unencrypted, unauthenticated, RFCOMM server socket. 1046 * Call #accept to retrieve connections to this socket. 1047 * @return An RFCOMM BluetoothServerSocket 1048 * @throws IOException On error, for example Bluetooth not available, or 1049 * insufficient permissions. 1050 * @hide 1051 */ 1052 public BluetoothServerSocket listenUsingInsecureRfcommOn(int port) throws IOException { 1053 BluetoothServerSocket socket = new BluetoothServerSocket( 1054 BluetoothSocket.TYPE_RFCOMM, false, false, port); 1055 int errno = socket.mSocket.bindListen(); 1056 if (errno != 0) { 1057 try { 1058 socket.close(); 1059 } catch (IOException e) {} 1060 socket.mSocket.throwErrnoNative(errno); 1061 } 1062 return socket; 1063 } 1064 1065 /** 1066 * Construct an encrypted, RFCOMM server socket. 1067 * Call #accept to retrieve connections to this socket. 1068 * @return An RFCOMM BluetoothServerSocket 1069 * @throws IOException On error, for example Bluetooth not available, or 1070 * insufficient permissions. 1071 * @hide 1072 */ 1073 public BluetoothServerSocket listenUsingEncryptedRfcommOn(int port) 1074 throws IOException { 1075 BluetoothServerSocket socket = new BluetoothServerSocket( 1076 BluetoothSocket.TYPE_RFCOMM, false, true, port); 1077 int errno = socket.mSocket.bindListen(); 1078 if (errno != 0) { 1079 try { 1080 socket.close(); 1081 } catch (IOException e) {} 1082 socket.mSocket.throwErrnoNative(errno); 1083 } 1084 return socket; 1085 } 1086 1087 /** 1088 * Construct a SCO server socket. 1089 * Call #accept to retrieve connections to this socket. 1090 * @return A SCO BluetoothServerSocket 1091 * @throws IOException On error, for example Bluetooth not available, or 1092 * insufficient permissions. 1093 * @hide 1094 */ 1095 public static BluetoothServerSocket listenUsingScoOn() throws IOException { 1096 BluetoothServerSocket socket = new BluetoothServerSocket( 1097 BluetoothSocket.TYPE_SCO, false, false, -1); 1098 int errno = socket.mSocket.bindListen(); 1099 if (errno != 0) { 1100 try { 1101 socket.close(); 1102 } catch (IOException e) {} 1103 socket.mSocket.throwErrnoNative(errno); 1104 } 1105 return socket; 1106 } 1107 1108 /** 1109 * Read the local Out of Band Pairing Data 1110 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1111 * 1112 * @return Pair<byte[], byte[]> of Hash and Randomizer 1113 * 1114 * @hide 1115 */ 1116 public Pair<byte[], byte[]> readOutOfBandData() { 1117 if (getState() != STATE_ON) return null; 1118 try { 1119 byte[] hash; 1120 byte[] randomizer; 1121 1122 byte[] ret = mService.readOutOfBandData(); 1123 1124 if (ret == null || ret.length != 32) return null; 1125 1126 hash = Arrays.copyOfRange(ret, 0, 16); 1127 randomizer = Arrays.copyOfRange(ret, 16, 32); 1128 1129 if (DBG) { 1130 Log.d(TAG, "readOutOfBandData:" + Arrays.toString(hash) + 1131 ":" + Arrays.toString(randomizer)); 1132 } 1133 return new Pair<byte[], byte[]>(hash, randomizer); 1134 1135 } catch (RemoteException e) {Log.e(TAG, "", e);} 1136 return null; 1137 } 1138 1139 /** 1140 * Get the profile proxy object associated with the profile. 1141 * 1142 * <p>Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1143 * {@link BluetoothProfile#A2DP}. Clients must implements 1144 * {@link BluetoothProfile.ServiceListener} to get notified of 1145 * the connection status and to get the proxy object. 1146 * 1147 * @param context Context of the application 1148 * @param listener The service Listener for connection callbacks. 1149 * @param profile The Bluetooth profile; either {@link BluetoothProfile#HEALTH}, 1150 * {@link BluetoothProfile#HEADSET} or {@link BluetoothProfile#A2DP}. 1151 * @return true on success, false on error 1152 */ 1153 public boolean getProfileProxy(Context context, BluetoothProfile.ServiceListener listener, 1154 int profile) { 1155 if (context == null || listener == null) return false; 1156 1157 if (profile == BluetoothProfile.HEADSET) { 1158 BluetoothHeadset headset = new BluetoothHeadset(context, listener); 1159 return true; 1160 } else if (profile == BluetoothProfile.A2DP) { 1161 BluetoothA2dp a2dp = new BluetoothA2dp(context, listener); 1162 return true; 1163 } else if (profile == BluetoothProfile.INPUT_DEVICE) { 1164 BluetoothInputDevice iDev = new BluetoothInputDevice(context, listener); 1165 return true; 1166 } else if (profile == BluetoothProfile.PAN) { 1167 BluetoothPan pan = new BluetoothPan(context, listener); 1168 return true; 1169 } else if (profile == BluetoothProfile.HEALTH) { 1170 BluetoothHealth health = new BluetoothHealth(context, listener); 1171 return true; 1172 } else { 1173 return false; 1174 } 1175 } 1176 1177 /** 1178 * Close the connection of the profile proxy to the Service. 1179 * 1180 * <p> Clients should call this when they are no longer using 1181 * the proxy obtained from {@link #getProfileProxy}. 1182 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1183 * {@link BluetoothProfile#A2DP} 1184 * 1185 * @param profile 1186 * @param proxy Profile proxy object 1187 */ 1188 public void closeProfileProxy(int profile, BluetoothProfile proxy) { 1189 if (proxy == null) return; 1190 1191 switch (profile) { 1192 case BluetoothProfile.HEADSET: 1193 BluetoothHeadset headset = (BluetoothHeadset)proxy; 1194 headset.close(); 1195 break; 1196 case BluetoothProfile.A2DP: 1197 BluetoothA2dp a2dp = (BluetoothA2dp)proxy; 1198 a2dp.close(); 1199 break; 1200 case BluetoothProfile.INPUT_DEVICE: 1201 BluetoothInputDevice iDev = (BluetoothInputDevice)proxy; 1202 iDev.close(); 1203 break; 1204 case BluetoothProfile.PAN: 1205 BluetoothPan pan = (BluetoothPan)proxy; 1206 pan.close(); 1207 break; 1208 case BluetoothProfile.HEALTH: 1209 BluetoothHealth health = (BluetoothHealth)proxy; 1210 health.close(); 1211 break; 1212 } 1213 } 1214 1215 /** 1216 * Enable control of the Bluetooth Adapter for a single application. 1217 * 1218 * <p>Some applications need to use Bluetooth for short periods of time to 1219 * transfer data but don't want all the associated implications like 1220 * automatic connection to headsets etc. 1221 * 1222 * <p> Multiple applications can call this. This is reference counted and 1223 * Bluetooth disabled only when no one else is using it. There will be no UI 1224 * shown to the user while bluetooth is being enabled. Any user action will 1225 * override this call. For example, if user wants Bluetooth on and the last 1226 * user of this API wanted to disable Bluetooth, Bluetooth will not be 1227 * turned off. 1228 * 1229 * <p> This API is only meant to be used by internal applications. Third 1230 * party applications but use {@link #enable} and {@link #disable} APIs. 1231 * 1232 * <p> If this API returns true, it means the callback will be called. 1233 * The callback will be called with the current state of Bluetooth. 1234 * If the state is not what was requested, an internal error would be the 1235 * reason. If Bluetooth is already on and if this function is called to turn 1236 * it on, the api will return true and a callback will be called. 1237 * 1238 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1239 * 1240 * @param on True for on, false for off. 1241 * @param callback The callback to notify changes to the state. 1242 * @hide 1243 */ 1244 public boolean changeApplicationBluetoothState(boolean on, 1245 BluetoothStateChangeCallback callback) { 1246 if (callback == null) return false; 1247 1248 try { 1249 return mService.changeApplicationBluetoothState(on, new 1250 StateChangeCallbackWrapper(callback), new Binder()); 1251 } catch (RemoteException e) { 1252 Log.e(TAG, "changeBluetoothState", e); 1253 } 1254 return false; 1255 } 1256 1257 /** 1258 * @hide 1259 */ 1260 public interface BluetoothStateChangeCallback { 1261 public void onBluetoothStateChange(boolean on); 1262 } 1263 1264 /** 1265 * @hide 1266 */ 1267 public class StateChangeCallbackWrapper extends IBluetoothStateChangeCallback.Stub { 1268 private BluetoothStateChangeCallback mCallback; 1269 1270 StateChangeCallbackWrapper(BluetoothStateChangeCallback 1271 callback) { 1272 mCallback = callback; 1273 } 1274 1275 @Override 1276 public void onBluetoothStateChange(boolean on) { 1277 mCallback.onBluetoothStateChange(on); 1278 } 1279 } 1280 1281 private Set<BluetoothDevice> toDeviceSet(String[] addresses) { 1282 Set<BluetoothDevice> devices = new HashSet<BluetoothDevice>(addresses.length); 1283 for (int i = 0; i < addresses.length; i++) { 1284 devices.add(getRemoteDevice(addresses[i])); 1285 } 1286 return Collections.unmodifiableSet(devices); 1287 } 1288 1289 /** 1290 * Validate a Bluetooth address, such as "00:43:A8:23:10:F0" 1291 * <p>Alphabetic characters must be uppercase to be valid. 1292 * 1293 * @param address Bluetooth address as string 1294 * @return true if the address is valid, false otherwise 1295 */ 1296 public static boolean checkBluetoothAddress(String address) { 1297 if (address == null || address.length() != ADDRESS_LENGTH) { 1298 return false; 1299 } 1300 for (int i = 0; i < ADDRESS_LENGTH; i++) { 1301 char c = address.charAt(i); 1302 switch (i % 3) { 1303 case 0: 1304 case 1: 1305 if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')) { 1306 // hex character, OK 1307 break; 1308 } 1309 return false; 1310 case 2: 1311 if (c == ':') { 1312 break; // OK 1313 } 1314 return false; 1315 } 1316 } 1317 return true; 1318 } 1319 } 1320
