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 * Get a {@link BluetoothDevice} object for the given Bluetooth hardware 409 * address. 410 * <p>Valid Bluetooth hardware addresses must be 6 bytes. This method 411 * expects the address in network byte order (MSB first). 412 * <p>A {@link BluetoothDevice} will always be returned for a valid 413 * hardware address, even if this adapter has never seen that device. 414 * 415 * @param address Bluetooth MAC address (6 bytes) 416 * @throws IllegalArgumentException if address is invalid 417 */ 418 public BluetoothDevice getRemoteDevice(byte[] address) { 419 if (address == null || address.length != 6) { 420 throw new IllegalArgumentException("Bluetooth address must have 6 bytes"); 421 } 422 return new BluetoothDevice(String.format("%02X:%02X:%02X:%02X:%02X:%02X", 423 address[0], address[1], address[2], address[3], address[4], address[5])); 424 } 425 426 /** 427 * Return true if Bluetooth is currently enabled and ready for use. 428 * <p>Equivalent to: 429 * <code>getBluetoothState() == STATE_ON</code> 430 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 431 * 432 * @return true if the local adapter is turned on 433 */ 434 public boolean isEnabled() { 435 try { 436 return mService.isEnabled(); 437 } catch (RemoteException e) {Log.e(TAG, "", e);} 438 return false; 439 } 440 441 /** 442 * Get the current state of the local Bluetooth adapter. 443 * <p>Possible return values are 444 * {@link #STATE_OFF}, 445 * {@link #STATE_TURNING_ON}, 446 * {@link #STATE_ON}, 447 * {@link #STATE_TURNING_OFF}. 448 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 449 * 450 * @return current state of Bluetooth adapter 451 */ 452 public int getState() { 453 try { 454 return mService.getBluetoothState(); 455 } catch (RemoteException e) {Log.e(TAG, "", e);} 456 return STATE_OFF; 457 } 458 459 /** 460 * Turn on the local Bluetooth adapter—do not use without explicit 461 * user action to turn on Bluetooth. 462 * <p>This powers on the underlying Bluetooth hardware, and starts all 463 * Bluetooth system services. 464 * <p class="caution"><strong>Bluetooth should never be enabled without 465 * direct user consent</strong>. If you want to turn on Bluetooth in order 466 * to create a wireless connection, you should use the {@link 467 * #ACTION_REQUEST_ENABLE} Intent, which will raise a dialog that requests 468 * user permission to turn on Bluetooth. The {@link #enable()} method is 469 * provided only for applications that include a user interface for changing 470 * system settings, such as a "power manager" app.</p> 471 * <p>This is an asynchronous call: it will return immediately, and 472 * clients should listen for {@link #ACTION_STATE_CHANGED} 473 * to be notified of subsequent adapter state changes. If this call returns 474 * true, then the adapter state will immediately transition from {@link 475 * #STATE_OFF} to {@link #STATE_TURNING_ON}, and some time 476 * later transition to either {@link #STATE_OFF} or {@link 477 * #STATE_ON}. If this call returns false then there was an 478 * immediate problem that will prevent the adapter from being turned on - 479 * such as Airplane mode, or the adapter is already turned on. 480 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 481 * permission 482 * 483 * @return true to indicate adapter startup has begun, or false on 484 * immediate error 485 */ 486 public boolean enable() { 487 try { 488 return mService.enable(); 489 } catch (RemoteException e) {Log.e(TAG, "", e);} 490 return false; 491 } 492 493 /** 494 * Turn off the local Bluetooth adapter—do not use without explicit 495 * user action to turn off Bluetooth. 496 * <p>This gracefully shuts down all Bluetooth connections, stops Bluetooth 497 * system services, and powers down the underlying Bluetooth hardware. 498 * <p class="caution"><strong>Bluetooth should never be disabled without 499 * direct user consent</strong>. The {@link #disable()} method is 500 * provided only for applications that include a user interface for changing 501 * system settings, such as a "power manager" app.</p> 502 * <p>This is an asynchronous call: it will return immediately, and 503 * clients should listen for {@link #ACTION_STATE_CHANGED} 504 * to be notified of subsequent adapter state changes. If this call returns 505 * true, then the adapter state will immediately transition from {@link 506 * #STATE_ON} to {@link #STATE_TURNING_OFF}, and some time 507 * later transition to either {@link #STATE_OFF} or {@link 508 * #STATE_ON}. If this call returns false then there was an 509 * immediate problem that will prevent the adapter from being turned off - 510 * such as the adapter already being turned off. 511 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 512 * permission 513 * 514 * @return true to indicate adapter shutdown has begun, or false on 515 * immediate error 516 */ 517 public boolean disable() { 518 try { 519 return mService.disable(true); 520 } catch (RemoteException e) {Log.e(TAG, "", e);} 521 return false; 522 } 523 524 /** 525 * Returns the hardware address of the local Bluetooth adapter. 526 * <p>For example, "00:11:22:AA:BB:CC". 527 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 528 * 529 * @return Bluetooth hardware address as string 530 */ 531 public String getAddress() { 532 try { 533 return mService.getAddress(); 534 } catch (RemoteException e) {Log.e(TAG, "", e);} 535 return null; 536 } 537 538 /** 539 * Get the friendly Bluetooth name of the local Bluetooth adapter. 540 * <p>This name is visible to remote Bluetooth devices. 541 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 542 * 543 * @return the Bluetooth name, or null on error 544 */ 545 public String getName() { 546 try { 547 return mService.getName(); 548 } catch (RemoteException e) {Log.e(TAG, "", e);} 549 return null; 550 } 551 552 /** 553 * Get the UUIDs supported by the local Bluetooth adapter. 554 * 555 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 556 * 557 * @return the UUIDs supported by the local Bluetooth Adapter. 558 * @hide 559 */ 560 public ParcelUuid[] getUuids() { 561 if (getState() != STATE_ON) return null; 562 try { 563 return mService.getUuids(); 564 } catch (RemoteException e) {Log.e(TAG, "", e);} 565 return null; 566 } 567 568 /** 569 * Set the friendly Bluetooth name of the local Bluetooth adapter. 570 * <p>This name is visible to remote Bluetooth devices. 571 * <p>Valid Bluetooth names are a maximum of 248 bytes using UTF-8 572 * encoding, although many remote devices can only display the first 573 * 40 characters, and some may be limited to just 20. 574 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 575 * will return false. After turning on Bluetooth, 576 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 577 * to get the updated value. 578 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 579 * 580 * @param name a valid Bluetooth name 581 * @return true if the name was set, false otherwise 582 */ 583 public boolean setName(String name) { 584 if (getState() != STATE_ON) return false; 585 try { 586 return mService.setName(name); 587 } catch (RemoteException e) {Log.e(TAG, "", e);} 588 return false; 589 } 590 591 /** 592 * Get the current Bluetooth scan mode of the local Bluetooth adapter. 593 * <p>The Bluetooth scan mode determines if the local adapter is 594 * connectable and/or discoverable from remote Bluetooth devices. 595 * <p>Possible values are: 596 * {@link #SCAN_MODE_NONE}, 597 * {@link #SCAN_MODE_CONNECTABLE}, 598 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 599 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 600 * will return {@link #SCAN_MODE_NONE}. After turning on Bluetooth, 601 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 602 * to get the updated value. 603 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 604 * 605 * @return scan mode 606 */ 607 public int getScanMode() { 608 if (getState() != STATE_ON) return SCAN_MODE_NONE; 609 try { 610 return mService.getScanMode(); 611 } catch (RemoteException e) {Log.e(TAG, "", e);} 612 return SCAN_MODE_NONE; 613 } 614 615 /** 616 * Set the Bluetooth scan mode of the local Bluetooth adapter. 617 * <p>The Bluetooth scan mode determines if the local adapter is 618 * connectable and/or discoverable from remote Bluetooth devices. 619 * <p>For privacy reasons, discoverable mode is automatically turned off 620 * after <code>duration</code> seconds. For example, 120 seconds should be 621 * enough for a remote device to initiate and complete its discovery 622 * process. 623 * <p>Valid scan mode values are: 624 * {@link #SCAN_MODE_NONE}, 625 * {@link #SCAN_MODE_CONNECTABLE}, 626 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 627 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 628 * will return false. After turning on Bluetooth, 629 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 630 * to get the updated value. 631 * <p>Requires {@link android.Manifest.permission#WRITE_SECURE_SETTINGS} 632 * <p>Applications cannot set the scan mode. They should use 633 * <code>startActivityForResult( 634 * BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE}) 635 * </code>instead. 636 * 637 * @param mode valid scan mode 638 * @param duration time in seconds to apply scan mode, only used for 639 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE} 640 * @return true if the scan mode was set, false otherwise 641 * @hide 642 */ 643 public boolean setScanMode(int mode, int duration) { 644 if (getState() != STATE_ON) return false; 645 try { 646 return mService.setScanMode(mode, duration); 647 } catch (RemoteException e) {Log.e(TAG, "", e);} 648 return false; 649 } 650 651 /** @hide */ 652 public boolean setScanMode(int mode) { 653 if (getState() != STATE_ON) return false; 654 return setScanMode(mode, 120); 655 } 656 657 /** @hide */ 658 public int getDiscoverableTimeout() { 659 if (getState() != STATE_ON) return -1; 660 try { 661 return mService.getDiscoverableTimeout(); 662 } catch (RemoteException e) {Log.e(TAG, "", e);} 663 return -1; 664 } 665 666 /** @hide */ 667 public void setDiscoverableTimeout(int timeout) { 668 if (getState() != STATE_ON) return; 669 try { 670 mService.setDiscoverableTimeout(timeout); 671 } catch (RemoteException e) {Log.e(TAG, "", e);} 672 } 673 674 /** 675 * Start the remote device discovery process. 676 * <p>The discovery process usually involves an inquiry scan of about 12 677 * seconds, followed by a page scan of each new device to retrieve its 678 * Bluetooth name. 679 * <p>This is an asynchronous call, it will return immediately. Register 680 * for {@link #ACTION_DISCOVERY_STARTED} and {@link 681 * #ACTION_DISCOVERY_FINISHED} intents to determine exactly when the 682 * discovery starts and completes. Register for {@link 683 * BluetoothDevice#ACTION_FOUND} to be notified as remote Bluetooth devices 684 * are found. 685 * <p>Device discovery is a heavyweight procedure. New connections to 686 * remote Bluetooth devices should not be attempted while discovery is in 687 * progress, and existing connections will experience limited bandwidth 688 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 689 * discovery. Discovery is not managed by the Activity, 690 * but is run as a system service, so an application should always call 691 * {@link BluetoothAdapter#cancelDiscovery()} even if it 692 * did not directly request a discovery, just to be sure. 693 * <p>Device discovery will only find remote devices that are currently 694 * <i>discoverable</i> (inquiry scan enabled). Many Bluetooth devices are 695 * not discoverable by default, and need to be entered into a special mode. 696 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 697 * will return false. After turning on Bluetooth, 698 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 699 * to get the updated value. 700 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 701 * 702 * @return true on success, false on error 703 */ 704 public boolean startDiscovery() { 705 if (getState() != STATE_ON) return false; 706 try { 707 return mService.startDiscovery(); 708 } catch (RemoteException e) {Log.e(TAG, "", e);} 709 return false; 710 } 711 712 /** 713 * Cancel the current device discovery process. 714 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 715 * <p>Because discovery is a heavyweight procedure for the Bluetooth 716 * adapter, this method should always be called before attempting to connect 717 * to a remote device with {@link 718 * android.bluetooth.BluetoothSocket#connect()}. Discovery is not managed by 719 * the Activity, but is run as a system service, so an application should 720 * always call cancel discovery even if it did not directly request a 721 * discovery, just to be sure. 722 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 723 * will return false. After turning on Bluetooth, 724 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 725 * to get the updated value. 726 * 727 * @return true on success, false on error 728 */ 729 public boolean cancelDiscovery() { 730 if (getState() != STATE_ON) return false; 731 try { 732 return mService.cancelDiscovery(); 733 } catch (RemoteException e) {Log.e(TAG, "", e);} 734 return false; 735 } 736 737 /** 738 * Return true if the local Bluetooth adapter is currently in the device 739 * discovery process. 740 * <p>Device discovery is a heavyweight procedure. New connections to 741 * remote Bluetooth devices should not be attempted while discovery is in 742 * progress, and existing connections will experience limited bandwidth 743 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 744 * discovery. 745 * <p>Applications can also register for {@link #ACTION_DISCOVERY_STARTED} 746 * or {@link #ACTION_DISCOVERY_FINISHED} to be notified when discovery 747 * starts or completes. 748 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 749 * will return false. 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 true if discovering 755 */ 756 public boolean isDiscovering() { 757 if (getState() != STATE_ON) return false; 758 try { 759 return mService.isDiscovering(); 760 } catch (RemoteException e) {Log.e(TAG, "", e);} 761 return false; 762 } 763 764 /** 765 * Return the set of {@link BluetoothDevice} objects that are bonded 766 * (paired) to the local adapter. 767 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 768 * will return an empty set. After turning on Bluetooth, 769 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 770 * to get the updated value. 771 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 772 * 773 * @return unmodifiable set of {@link BluetoothDevice}, or null on error 774 */ 775 public Set<BluetoothDevice> getBondedDevices() { 776 if (getState() != STATE_ON) { 777 return toDeviceSet(new String[0]); 778 } 779 try { 780 return toDeviceSet(mService.listBonds()); 781 } catch (RemoteException e) {Log.e(TAG, "", e);} 782 return null; 783 } 784 785 /** 786 * Get the current connection state of the local Bluetooth adapter. 787 * This can be used to check whether the local Bluetooth adapter is connected 788 * to any profile of any other remote Bluetooth Device. 789 * 790 * <p> Use this function along with {@link #ACTION_CONNECTION_STATE_CHANGED} 791 * intent to get the connection state of the adapter. 792 * 793 * @return One of {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTED}, 794 * {@link #STATE_CONNECTING} or {@link #STATE_DISCONNECTED} 795 * 796 * @hide 797 */ 798 public int getConnectionState() { 799 if (getState() != STATE_ON) return BluetoothAdapter.STATE_DISCONNECTED; 800 try { 801 return mService.getAdapterConnectionState(); 802 } catch (RemoteException e) {Log.e(TAG, "getConnectionState:", e);} 803 return BluetoothAdapter.STATE_DISCONNECTED; 804 } 805 806 /** 807 * Get the current connection state of a profile. 808 * This function can be used to check whether the local Bluetooth adapter 809 * is connected to any remote device for a specific profile. 810 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET}, 811 * {@link BluetoothProfile#A2DP}. 812 * 813 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 814 * 815 * <p> Return value can be one of 816 * {@link BluetoothProfile#STATE_DISCONNECTED}, 817 * {@link BluetoothProfile#STATE_CONNECTING}, 818 * {@link BluetoothProfile#STATE_CONNECTED}, 819 * {@link BluetoothProfile#STATE_DISCONNECTING} 820 */ 821 public int getProfileConnectionState(int profile) { 822 if (getState() != STATE_ON) return BluetoothProfile.STATE_DISCONNECTED; 823 try { 824 return mService.getProfileConnectionState(profile); 825 } catch (RemoteException e) { 826 Log.e(TAG, "getProfileConnectionState:", e); 827 } 828 return BluetoothProfile.STATE_DISCONNECTED; 829 } 830 831 /** 832 /** 833 * Picks RFCOMM channels until none are left. 834 * Avoids reserved channels. 835 */ 836 private static class RfcommChannelPicker { 837 private static final int[] RESERVED_RFCOMM_CHANNELS = new int[] { 838 10, // HFAG 839 11, // HSAG 840 12, // OPUSH 841 19, // PBAP 842 }; 843 private static LinkedList<Integer> sChannels; // master list of non-reserved channels 844 private static Random sRandom; 845 846 private final LinkedList<Integer> mChannels; // local list of channels left to try 847 848 private final UUID mUuid; 849 850 public RfcommChannelPicker(UUID uuid) { 851 synchronized (RfcommChannelPicker.class) { 852 if (sChannels == null) { 853 // lazy initialization of non-reserved rfcomm channels 854 sChannels = new LinkedList<Integer>(); 855 for (int i = 1; i <= BluetoothSocket.MAX_RFCOMM_CHANNEL; i++) { 856 sChannels.addLast(new Integer(i)); 857 } 858 for (int reserved : RESERVED_RFCOMM_CHANNELS) { 859 sChannels.remove(new Integer(reserved)); 860 } 861 sRandom = new Random(); 862 } 863 mChannels = (LinkedList<Integer>)sChannels.clone(); 864 } 865 mUuid = uuid; 866 } 867 /* Returns next random channel, or -1 if we're out */ 868 public int nextChannel() { 869 if (mChannels.size() == 0) { 870 return -1; 871 } 872 return mChannels.remove(sRandom.nextInt(mChannels.size())); 873 } 874 } 875 876 /** 877 * Create a listening, secure RFCOMM Bluetooth socket. 878 * <p>A remote device connecting to this socket will be authenticated and 879 * communication on this socket will be encrypted. 880 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 881 * connections from a listening {@link BluetoothServerSocket}. 882 * <p>Valid RFCOMM channels are in range 1 to 30. 883 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 884 * @param channel RFCOMM channel to listen on 885 * @return a listening RFCOMM BluetoothServerSocket 886 * @throws IOException on error, for example Bluetooth not available, or 887 * insufficient permissions, or channel in use. 888 * @hide 889 */ 890 public BluetoothServerSocket listenUsingRfcommOn(int channel) throws IOException { 891 BluetoothServerSocket socket = new BluetoothServerSocket( 892 BluetoothSocket.TYPE_RFCOMM, true, true, channel); 893 int errno = socket.mSocket.bindListen(); 894 if (errno != 0) { 895 try { 896 socket.close(); 897 } catch (IOException e) {} 898 socket.mSocket.throwErrnoNative(errno); 899 } 900 return socket; 901 } 902 903 /** 904 * Create a listening, secure RFCOMM Bluetooth socket with Service Record. 905 * <p>A remote device connecting to this socket will be authenticated and 906 * communication on this socket will be encrypted. 907 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 908 * connections from a listening {@link BluetoothServerSocket}. 909 * <p>The system will assign an unused RFCOMM channel to listen on. 910 * <p>The system will also register a Service Discovery 911 * Protocol (SDP) record with the local SDP server containing the specified 912 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 913 * can use the same UUID to query our SDP server and discover which channel 914 * to connect to. This SDP record will be removed when this socket is 915 * closed, or if this application closes unexpectedly. 916 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 917 * connect to this socket from another device using the same {@link UUID}. 918 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 919 * @param name service name for SDP record 920 * @param uuid uuid for SDP record 921 * @return a listening RFCOMM BluetoothServerSocket 922 * @throws IOException on error, for example Bluetooth not available, or 923 * insufficient permissions, or channel in use. 924 */ 925 public BluetoothServerSocket listenUsingRfcommWithServiceRecord(String name, UUID uuid) 926 throws IOException { 927 return createNewRfcommSocketAndRecord(name, uuid, true, true); 928 } 929 930 /** 931 * Create a listening, insecure RFCOMM Bluetooth socket with Service Record. 932 * <p>The link key is not required to be authenticated, i.e the communication may be 933 * vulnerable to Man In the Middle attacks. For Bluetooth 2.1 devices, 934 * the link will be encrypted, as encryption is mandartory. 935 * For legacy devices (pre Bluetooth 2.1 devices) the link will not 936 * be encrypted. Use {@link #listenUsingRfcommWithServiceRecord}, if an 937 * encrypted and authenticated communication channel is desired. 938 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 939 * connections from a listening {@link BluetoothServerSocket}. 940 * <p>The system will assign an unused RFCOMM channel to listen on. 941 * <p>The system will also register a Service Discovery 942 * Protocol (SDP) record with the local SDP server containing the specified 943 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 944 * can use the same UUID to query our SDP server and discover which channel 945 * to connect to. This SDP record will be removed when this socket is 946 * closed, or if this application closes unexpectedly. 947 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 948 * connect to this socket from another device using the same {@link UUID}. 949 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 950 * @param name service name for SDP record 951 * @param uuid uuid for SDP record 952 * @return a listening RFCOMM BluetoothServerSocket 953 * @throws IOException on error, for example Bluetooth not available, or 954 * insufficient permissions, or channel in use. 955 */ 956 public BluetoothServerSocket listenUsingInsecureRfcommWithServiceRecord(String name, UUID uuid) 957 throws IOException { 958 return createNewRfcommSocketAndRecord(name, uuid, false, false); 959 } 960 961 /** 962 * Create a listening, encrypted, 963 * RFCOMM Bluetooth socket with Service Record. 964 * <p>The link will be encrypted, but the link key is not required to be authenticated 965 * i.e the communication is vulnerable to Man In the Middle attacks. Use 966 * {@link #listenUsingRfcommWithServiceRecord}, to ensure an authenticated link key. 967 * <p> Use this socket if authentication of link key is not possible. 968 * For example, for Bluetooth 2.1 devices, if any of the devices does not have 969 * an input and output capability or just has the ability to display a numeric key, 970 * a secure socket connection is not possible and this socket can be used. 971 * Use {@link #listenUsingInsecureRfcommWithServiceRecord}, if encryption is not required. 972 * For Bluetooth 2.1 devices, the link will be encrypted, as encryption is mandartory. 973 * For more details, refer to the Security Model section 5.2 (vol 3) of 974 * Bluetooth Core Specification version 2.1 + EDR. 975 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 976 * connections from a listening {@link BluetoothServerSocket}. 977 * <p>The system will assign an unused RFCOMM channel to listen on. 978 * <p>The system will also register a Service Discovery 979 * Protocol (SDP) record with the local SDP server containing the specified 980 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 981 * can use the same UUID to query our SDP server and discover which channel 982 * to connect to. This SDP record will be removed when this socket is 983 * closed, or if this application closes unexpectedly. 984 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 985 * connect to this socket from another device using the same {@link UUID}. 986 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 987 * @param name service name for SDP record 988 * @param uuid uuid for SDP record 989 * @return a listening RFCOMM BluetoothServerSocket 990 * @throws IOException on error, for example Bluetooth not available, or 991 * insufficient permissions, or channel in use. 992 * @hide 993 */ 994 public BluetoothServerSocket listenUsingEncryptedRfcommWithServiceRecord( 995 String name, UUID uuid) throws IOException { 996 return createNewRfcommSocketAndRecord(name, uuid, false, true); 997 } 998 999 private BluetoothServerSocket createNewRfcommSocketAndRecord(String name, UUID uuid, 1000 boolean auth, boolean encrypt) throws IOException { 1001 RfcommChannelPicker picker = new RfcommChannelPicker(uuid); 1002 1003 BluetoothServerSocket socket; 1004 int channel; 1005 int errno; 1006 while (true) { 1007 channel = picker.nextChannel(); 1008 1009 if (channel == -1) { 1010 throw new IOException("No available channels"); 1011 } 1012 1013 socket = new BluetoothServerSocket( 1014 BluetoothSocket.TYPE_RFCOMM, auth, encrypt, channel); 1015 errno = socket.mSocket.bindListen(); 1016 if (errno == 0) { 1017 if (DBG) Log.d(TAG, "listening on RFCOMM channel " + channel); 1018 break; // success 1019 } else if (errno == BluetoothSocket.EADDRINUSE) { 1020 if (DBG) Log.d(TAG, "RFCOMM channel " + channel + " in use"); 1021 try { 1022 socket.close(); 1023 } catch (IOException e) {} 1024 continue; // try another channel 1025 } else { 1026 try { 1027 socket.close(); 1028 } catch (IOException e) {} 1029 socket.mSocket.throwErrnoNative(errno); // Exception as a result of bindListen() 1030 } 1031 } 1032 1033 int handle = -1; 1034 try { 1035 handle = mService.addRfcommServiceRecord(name, new ParcelUuid(uuid), channel, 1036 new Binder()); 1037 } catch (RemoteException e) {Log.e(TAG, "", e);} 1038 if (handle == -1) { 1039 try { 1040 socket.close(); 1041 } catch (IOException e) {} 1042 throw new IOException("Not able to register SDP record for " + name); 1043 } 1044 1045 if (mServiceRecordHandler == null) { 1046 mServiceRecordHandler = new Handler(Looper.getMainLooper()) { 1047 public void handleMessage(Message msg) { 1048 /* handle socket closing */ 1049 int handle = msg.what; 1050 try { 1051 if (DBG) Log.d(TAG, "Removing service record " + 1052 Integer.toHexString(handle)); 1053 mService.removeServiceRecord(handle); 1054 } catch (RemoteException e) {Log.e(TAG, "", e);} 1055 } 1056 }; 1057 } 1058 socket.setCloseHandler(mServiceRecordHandler, handle); 1059 return socket; 1060 } 1061 1062 1063 /** 1064 * Construct an unencrypted, unauthenticated, RFCOMM server socket. 1065 * Call #accept to retrieve connections to this socket. 1066 * @return An RFCOMM BluetoothServerSocket 1067 * @throws IOException On error, for example Bluetooth not available, or 1068 * insufficient permissions. 1069 * @hide 1070 */ 1071 public BluetoothServerSocket listenUsingInsecureRfcommOn(int port) throws IOException { 1072 BluetoothServerSocket socket = new BluetoothServerSocket( 1073 BluetoothSocket.TYPE_RFCOMM, false, false, port); 1074 int errno = socket.mSocket.bindListen(); 1075 if (errno != 0) { 1076 try { 1077 socket.close(); 1078 } catch (IOException e) {} 1079 socket.mSocket.throwErrnoNative(errno); 1080 } 1081 return socket; 1082 } 1083 1084 /** 1085 * Construct an encrypted, RFCOMM server socket. 1086 * Call #accept to retrieve connections to this socket. 1087 * @return An RFCOMM BluetoothServerSocket 1088 * @throws IOException On error, for example Bluetooth not available, or 1089 * insufficient permissions. 1090 * @hide 1091 */ 1092 public BluetoothServerSocket listenUsingEncryptedRfcommOn(int port) 1093 throws IOException { 1094 BluetoothServerSocket socket = new BluetoothServerSocket( 1095 BluetoothSocket.TYPE_RFCOMM, false, true, port); 1096 int errno = socket.mSocket.bindListen(); 1097 if (errno != 0) { 1098 try { 1099 socket.close(); 1100 } catch (IOException e) {} 1101 socket.mSocket.throwErrnoNative(errno); 1102 } 1103 return socket; 1104 } 1105 1106 /** 1107 * Construct a SCO server socket. 1108 * Call #accept to retrieve connections to this socket. 1109 * @return A SCO BluetoothServerSocket 1110 * @throws IOException On error, for example Bluetooth not available, or 1111 * insufficient permissions. 1112 * @hide 1113 */ 1114 public static BluetoothServerSocket listenUsingScoOn() throws IOException { 1115 BluetoothServerSocket socket = new BluetoothServerSocket( 1116 BluetoothSocket.TYPE_SCO, false, false, -1); 1117 int errno = socket.mSocket.bindListen(); 1118 if (errno != 0) { 1119 try { 1120 socket.close(); 1121 } catch (IOException e) {} 1122 socket.mSocket.throwErrnoNative(errno); 1123 } 1124 return socket; 1125 } 1126 1127 /** 1128 * Read the local Out of Band Pairing Data 1129 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1130 * 1131 * @return Pair<byte[], byte[]> of Hash and Randomizer 1132 * 1133 * @hide 1134 */ 1135 public Pair<byte[], byte[]> readOutOfBandData() { 1136 if (getState() != STATE_ON) return null; 1137 try { 1138 byte[] hash; 1139 byte[] randomizer; 1140 1141 byte[] ret = mService.readOutOfBandData(); 1142 1143 if (ret == null || ret.length != 32) return null; 1144 1145 hash = Arrays.copyOfRange(ret, 0, 16); 1146 randomizer = Arrays.copyOfRange(ret, 16, 32); 1147 1148 if (DBG) { 1149 Log.d(TAG, "readOutOfBandData:" + Arrays.toString(hash) + 1150 ":" + Arrays.toString(randomizer)); 1151 } 1152 return new Pair<byte[], byte[]>(hash, randomizer); 1153 1154 } catch (RemoteException e) {Log.e(TAG, "", e);} 1155 return null; 1156 } 1157 1158 /** 1159 * Get the profile proxy object associated with the profile. 1160 * 1161 * <p>Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1162 * {@link BluetoothProfile#A2DP}. Clients must implements 1163 * {@link BluetoothProfile.ServiceListener} to get notified of 1164 * the connection status and to get the proxy object. 1165 * 1166 * @param context Context of the application 1167 * @param listener The service Listener for connection callbacks. 1168 * @param profile The Bluetooth profile; either {@link BluetoothProfile#HEALTH}, 1169 * {@link BluetoothProfile#HEADSET} or {@link BluetoothProfile#A2DP}. 1170 * @return true on success, false on error 1171 */ 1172 public boolean getProfileProxy(Context context, BluetoothProfile.ServiceListener listener, 1173 int profile) { 1174 if (context == null || listener == null) return false; 1175 1176 if (profile == BluetoothProfile.HEADSET) { 1177 BluetoothHeadset headset = new BluetoothHeadset(context, listener); 1178 return true; 1179 } else if (profile == BluetoothProfile.A2DP) { 1180 BluetoothA2dp a2dp = new BluetoothA2dp(context, listener); 1181 return true; 1182 } else if (profile == BluetoothProfile.INPUT_DEVICE) { 1183 BluetoothInputDevice iDev = new BluetoothInputDevice(context, listener); 1184 return true; 1185 } else if (profile == BluetoothProfile.PAN) { 1186 BluetoothPan pan = new BluetoothPan(context, listener); 1187 return true; 1188 } else if (profile == BluetoothProfile.HEALTH) { 1189 BluetoothHealth health = new BluetoothHealth(context, listener); 1190 return true; 1191 } else { 1192 return false; 1193 } 1194 } 1195 1196 /** 1197 * Close the connection of the profile proxy to the Service. 1198 * 1199 * <p> Clients should call this when they are no longer using 1200 * the proxy obtained from {@link #getProfileProxy}. 1201 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1202 * {@link BluetoothProfile#A2DP} 1203 * 1204 * @param profile 1205 * @param proxy Profile proxy object 1206 */ 1207 public void closeProfileProxy(int profile, BluetoothProfile proxy) { 1208 if (proxy == null) return; 1209 1210 switch (profile) { 1211 case BluetoothProfile.HEADSET: 1212 BluetoothHeadset headset = (BluetoothHeadset)proxy; 1213 headset.close(); 1214 break; 1215 case BluetoothProfile.A2DP: 1216 BluetoothA2dp a2dp = (BluetoothA2dp)proxy; 1217 a2dp.close(); 1218 break; 1219 case BluetoothProfile.INPUT_DEVICE: 1220 BluetoothInputDevice iDev = (BluetoothInputDevice)proxy; 1221 iDev.close(); 1222 break; 1223 case BluetoothProfile.PAN: 1224 BluetoothPan pan = (BluetoothPan)proxy; 1225 pan.close(); 1226 break; 1227 case BluetoothProfile.HEALTH: 1228 BluetoothHealth health = (BluetoothHealth)proxy; 1229 health.close(); 1230 break; 1231 } 1232 } 1233 1234 /** 1235 * Enable the Bluetooth Adapter, but don't auto-connect devices 1236 * and don't persist state. Only for use by system applications. 1237 * @hide 1238 */ 1239 public boolean enableNoAutoConnect() { 1240 try { 1241 return mService.enableNoAutoConnect(); 1242 } catch (RemoteException e) {Log.e(TAG, "", e);} 1243 return false; 1244 } 1245 1246 /** 1247 * Enable control of the Bluetooth Adapter for a single application. 1248 * 1249 * <p>Some applications need to use Bluetooth for short periods of time to 1250 * transfer data but don't want all the associated implications like 1251 * automatic connection to headsets etc. 1252 * 1253 * <p> Multiple applications can call this. This is reference counted and 1254 * Bluetooth disabled only when no one else is using it. There will be no UI 1255 * shown to the user while bluetooth is being enabled. Any user action will 1256 * override this call. For example, if user wants Bluetooth on and the last 1257 * user of this API wanted to disable Bluetooth, Bluetooth will not be 1258 * turned off. 1259 * 1260 * <p> This API is only meant to be used by internal applications. Third 1261 * party applications but use {@link #enable} and {@link #disable} APIs. 1262 * 1263 * <p> If this API returns true, it means the callback will be called. 1264 * The callback will be called with the current state of Bluetooth. 1265 * If the state is not what was requested, an internal error would be the 1266 * reason. If Bluetooth is already on and if this function is called to turn 1267 * it on, the api will return true and a callback will be called. 1268 * 1269 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1270 * 1271 * @param on True for on, false for off. 1272 * @param callback The callback to notify changes to the state. 1273 * @hide 1274 */ 1275 public boolean changeApplicationBluetoothState(boolean on, 1276 BluetoothStateChangeCallback callback) { 1277 if (callback == null) return false; 1278 1279 try { 1280 return mService.changeApplicationBluetoothState(on, new 1281 StateChangeCallbackWrapper(callback), new Binder()); 1282 } catch (RemoteException e) { 1283 Log.e(TAG, "changeBluetoothState", e); 1284 } 1285 return false; 1286 } 1287 1288 /** 1289 * @hide 1290 */ 1291 public interface BluetoothStateChangeCallback { 1292 public void onBluetoothStateChange(boolean on); 1293 } 1294 1295 /** 1296 * @hide 1297 */ 1298 public class StateChangeCallbackWrapper extends IBluetoothStateChangeCallback.Stub { 1299 private BluetoothStateChangeCallback mCallback; 1300 1301 StateChangeCallbackWrapper(BluetoothStateChangeCallback 1302 callback) { 1303 mCallback = callback; 1304 } 1305 1306 @Override 1307 public void onBluetoothStateChange(boolean on) { 1308 mCallback.onBluetoothStateChange(on); 1309 } 1310 } 1311 1312 private Set<BluetoothDevice> toDeviceSet(String[] addresses) { 1313 Set<BluetoothDevice> devices = new HashSet<BluetoothDevice>(addresses.length); 1314 for (int i = 0; i < addresses.length; i++) { 1315 devices.add(getRemoteDevice(addresses[i])); 1316 } 1317 return Collections.unmodifiableSet(devices); 1318 } 1319 1320 /** 1321 * Validate a String Bluetooth address, such as "00:43:A8:23:10:F0" 1322 * <p>Alphabetic characters must be uppercase to be valid. 1323 * 1324 * @param address Bluetooth address as string 1325 * @return true if the address is valid, false otherwise 1326 */ 1327 public static boolean checkBluetoothAddress(String address) { 1328 if (address == null || address.length() != ADDRESS_LENGTH) { 1329 return false; 1330 } 1331 for (int i = 0; i < ADDRESS_LENGTH; i++) { 1332 char c = address.charAt(i); 1333 switch (i % 3) { 1334 case 0: 1335 case 1: 1336 if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')) { 1337 // hex character, OK 1338 break; 1339 } 1340 return false; 1341 case 2: 1342 if (c == ':') { 1343 break; // OK 1344 } 1345 return false; 1346 } 1347 } 1348 return true; 1349 } 1350 } 1351
