BluetoothAdapter.java revision 75596b4545da36fa7592bd4a2ae680e5b336ee47
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 17package android.bluetooth; 18 19import android.annotation.SdkConstant; 20import android.annotation.SdkConstant.SdkConstantType; 21import android.content.Context; 22import android.os.Binder; 23import android.os.Handler; 24import android.os.IBinder; 25import android.os.Looper; 26import android.os.Message; 27import android.os.ParcelUuid; 28import android.os.RemoteException; 29import android.os.ServiceManager; 30import android.util.Log; 31import android.util.Pair; 32 33import java.io.IOException; 34import java.util.Arrays; 35import java.util.Collections; 36import java.util.HashSet; 37import java.util.LinkedList; 38import java.util.Random; 39import java.util.Set; 40import 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 * {@see BluetoothDevice} 66 * {@see BluetoothServerSocket} 67 */ 68public final class BluetoothAdapter { 69 private static final String TAG = "BluetoothAdapter"; 70 private static final boolean DBG = false; 71 72 /** 73 * Sentinel error value for this class. Guaranteed to not equal any other 74 * integer constant in this class. Provided as a convenience for functions 75 * that require a sentinel error value, for example: 76 * <p><code>Intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 77 * BluetoothAdapter.ERROR)</code> 78 */ 79 public static final int ERROR = Integer.MIN_VALUE; 80 81 /** 82 * Broadcast Action: The state of the local Bluetooth adapter has been 83 * changed. 84 * <p>For example, Bluetooth has been turned on or off. 85 * <p>Always contains the extra fields {@link #EXTRA_STATE} and {@link 86 * #EXTRA_PREVIOUS_STATE} containing the new and old states 87 * respectively. 88 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 89 */ 90 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 91 public static final String ACTION_STATE_CHANGED = 92 "android.bluetooth.adapter.action.STATE_CHANGED"; 93 94 /** 95 * Used as an int extra field in {@link #ACTION_STATE_CHANGED} 96 * intents to request the current power state. Possible values are: 97 * {@link #STATE_OFF}, 98 * {@link #STATE_TURNING_ON}, 99 * {@link #STATE_ON}, 100 * {@link #STATE_TURNING_OFF}, 101 */ 102 public static final String EXTRA_STATE = 103 "android.bluetooth.adapter.extra.STATE"; 104 /** 105 * Used as an int extra field in {@link #ACTION_STATE_CHANGED} 106 * intents to request the previous power state. Possible values are: 107 * {@link #STATE_OFF}, 108 * {@link #STATE_TURNING_ON}, 109 * {@link #STATE_ON}, 110 * {@link #STATE_TURNING_OFF}, 111 */ 112 public static final String EXTRA_PREVIOUS_STATE = 113 "android.bluetooth.adapter.extra.PREVIOUS_STATE"; 114 115 /** 116 * Indicates the local Bluetooth adapter is off. 117 */ 118 public static final int STATE_OFF = 10; 119 /** 120 * Indicates the local Bluetooth adapter is turning on. However local 121 * clients should wait for {@link #STATE_ON} before attempting to 122 * use the adapter. 123 */ 124 public static final int STATE_TURNING_ON = 11; 125 /** 126 * Indicates the local Bluetooth adapter is on, and ready for use. 127 */ 128 public static final int STATE_ON = 12; 129 /** 130 * Indicates the local Bluetooth adapter is turning off. Local clients 131 * should immediately attempt graceful disconnection of any remote links. 132 */ 133 public static final int STATE_TURNING_OFF = 13; 134 135 /** 136 * Activity Action: Show a system activity that requests discoverable mode. 137 * This activity will also request the user to turn on Bluetooth if it 138 * is not currently enabled. 139 * <p>Discoverable mode is equivalent to {@link 140 * #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. It allows remote devices to see 141 * this Bluetooth adapter when they perform a discovery. 142 * <p>For privacy, Android is not discoverable by default. 143 * <p>The sender of this Intent can optionally use extra field {@link 144 * #EXTRA_DISCOVERABLE_DURATION} to request the duration of 145 * discoverability. Currently the default duration is 120 seconds, and 146 * maximum duration is capped at 300 seconds for each request. 147 * <p>Notification of the result of this activity is posted using the 148 * {@link android.app.Activity#onActivityResult} callback. The 149 * <code>resultCode</code> 150 * will be the duration (in seconds) of discoverability or 151 * {@link android.app.Activity#RESULT_CANCELED} if the user rejected 152 * discoverability or an error has occurred. 153 * <p>Applications can also listen for {@link #ACTION_SCAN_MODE_CHANGED} 154 * for global notification whenever the scan mode changes. For example, an 155 * application can be notified when the device has ended discoverability. 156 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 157 */ 158 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) 159 public static final String ACTION_REQUEST_DISCOVERABLE = 160 "android.bluetooth.adapter.action.REQUEST_DISCOVERABLE"; 161 162 /** 163 * Used as an optional int extra field in {@link 164 * #ACTION_REQUEST_DISCOVERABLE} intents to request a specific duration 165 * for discoverability in seconds. The current default is 120 seconds, and 166 * requests over 300 seconds will be capped. These values could change. 167 */ 168 public static final String EXTRA_DISCOVERABLE_DURATION = 169 "android.bluetooth.adapter.extra.DISCOVERABLE_DURATION"; 170 171 /** 172 * Activity Action: Show a system activity that allows the user to turn on 173 * Bluetooth. 174 * <p>This system activity will return once Bluetooth has completed turning 175 * on, or the user has decided not to turn Bluetooth on. 176 * <p>Notification of the result of this activity is posted using the 177 * {@link android.app.Activity#onActivityResult} callback. The 178 * <code>resultCode</code> 179 * will be {@link android.app.Activity#RESULT_OK} if Bluetooth has been 180 * turned on or {@link android.app.Activity#RESULT_CANCELED} if the user 181 * has rejected the request or an error has occurred. 182 * <p>Applications can also listen for {@link #ACTION_STATE_CHANGED} 183 * for global notification whenever Bluetooth is turned on or off. 184 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 185 */ 186 @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) 187 public static final String ACTION_REQUEST_ENABLE = 188 "android.bluetooth.adapter.action.REQUEST_ENABLE"; 189 190 /** 191 * Broadcast Action: Indicates the Bluetooth scan mode of the local Adapter 192 * has changed. 193 * <p>Always contains the extra fields {@link #EXTRA_SCAN_MODE} and {@link 194 * #EXTRA_PREVIOUS_SCAN_MODE} containing the new and old scan modes 195 * respectively. 196 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 197 */ 198 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 199 public static final String ACTION_SCAN_MODE_CHANGED = 200 "android.bluetooth.adapter.action.SCAN_MODE_CHANGED"; 201 202 /** 203 * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} 204 * intents to request the current scan mode. Possible values are: 205 * {@link #SCAN_MODE_NONE}, 206 * {@link #SCAN_MODE_CONNECTABLE}, 207 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, 208 */ 209 public static final String EXTRA_SCAN_MODE = "android.bluetooth.adapter.extra.SCAN_MODE"; 210 /** 211 * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} 212 * intents to request the previous scan mode. Possible values are: 213 * {@link #SCAN_MODE_NONE}, 214 * {@link #SCAN_MODE_CONNECTABLE}, 215 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, 216 */ 217 public static final String EXTRA_PREVIOUS_SCAN_MODE = 218 "android.bluetooth.adapter.extra.PREVIOUS_SCAN_MODE"; 219 220 /** 221 * Indicates that both inquiry scan and page scan are disabled on the local 222 * Bluetooth adapter. Therefore this device is neither discoverable 223 * nor connectable from remote Bluetooth devices. 224 */ 225 public static final int SCAN_MODE_NONE = 20; 226 /** 227 * Indicates that inquiry scan is disabled, but page scan is enabled on the 228 * local Bluetooth adapter. Therefore this device is not discoverable from 229 * remote Bluetooth devices, but is connectable from remote devices that 230 * have previously discovered this device. 231 */ 232 public static final int SCAN_MODE_CONNECTABLE = 21; 233 /** 234 * Indicates that both inquiry scan and page scan are enabled on the local 235 * Bluetooth adapter. Therefore this device is both discoverable and 236 * connectable from remote Bluetooth devices. 237 */ 238 public static final int SCAN_MODE_CONNECTABLE_DISCOVERABLE = 23; 239 240 241 /** 242 * Broadcast Action: The local Bluetooth adapter has started the remote 243 * device discovery process. 244 * <p>This usually involves an inquiry scan of about 12 seconds, followed 245 * by a page scan of each new device to retrieve its Bluetooth name. 246 * <p>Register for {@link BluetoothDevice#ACTION_FOUND} to be notified as 247 * remote Bluetooth devices are found. 248 * <p>Device discovery is a heavyweight procedure. New connections to 249 * remote Bluetooth devices should not be attempted while discovery is in 250 * progress, and existing connections will experience limited bandwidth 251 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 252 * discovery. 253 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 254 */ 255 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 256 public static final String ACTION_DISCOVERY_STARTED = 257 "android.bluetooth.adapter.action.DISCOVERY_STARTED"; 258 /** 259 * Broadcast Action: The local Bluetooth adapter has finished the device 260 * discovery process. 261 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 262 */ 263 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 264 public static final String ACTION_DISCOVERY_FINISHED = 265 "android.bluetooth.adapter.action.DISCOVERY_FINISHED"; 266 267 /** 268 * Broadcast Action: The local Bluetooth adapter has changed its friendly 269 * Bluetooth name. 270 * <p>This name is visible to remote Bluetooth devices. 271 * <p>Always contains the extra field {@link #EXTRA_LOCAL_NAME} containing 272 * the name. 273 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 274 */ 275 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 276 public static final String ACTION_LOCAL_NAME_CHANGED = 277 "android.bluetooth.adapter.action.LOCAL_NAME_CHANGED"; 278 /** 279 * Used as a String extra field in {@link #ACTION_LOCAL_NAME_CHANGED} 280 * intents to request the local Bluetooth name. 281 */ 282 public static final String EXTRA_LOCAL_NAME = "android.bluetooth.adapter.extra.LOCAL_NAME"; 283 284 /** 285 * Intent used to broadcast the change in connection state of the local 286 * Bluetooth adapter to a profile of the remote device. When the adapter is 287 * not connected to any profiles of any remote devices and it attempts a 288 * connection to a profile this intent will sent. Once connected, this intent 289 * will not be sent for any more connection attempts to any profiles of any 290 * remote device. When the adapter disconnects from the last profile its 291 * connected to of any remote device, this intent will be sent. 292 * 293 * <p> This intent is useful for applications that are only concerned about 294 * whether the local adapter is connected to any profile of any device and 295 * are not really concerned about which profile. For example, an application 296 * which displays an icon to display whether Bluetooth is connected or not 297 * can use this intent. 298 * 299 * <p>This intent will have 3 extras: 300 * {@link #EXTRA_CONNECTION_STATE} - The current connection state. 301 * {@link #EXTRA_PREVIOUS_CONNECTION_STATE}- The previous connection state. 302 * {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. 303 * 304 * {@link #EXTRA_CONNECTION_STATE} or {@link #EXTRA_PREVIOUS_CONNECTION_STATE} 305 * can be any of {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, 306 * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}. 307 * 308 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. 309 */ 310 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 311 public static final String ACTION_CONNECTION_STATE_CHANGED = 312 "android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED"; 313 314 /** 315 * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} 316 * 317 * This extra represents the current connection state. 318 */ 319 public static final String EXTRA_CONNECTION_STATE = 320 "android.bluetooth.adapter.extra.CONNECTION_STATE"; 321 322 /** 323 * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} 324 * 325 * This extra represents the previous connection state. 326 */ 327 public static final String EXTRA_PREVIOUS_CONNECTION_STATE = 328 "android.bluetooth.adapter.extra.PREVIOUS_CONNECTION_STATE"; 329 330 /** The profile is in disconnected state */ 331 public static final int STATE_DISCONNECTED = 0; 332 /** The profile is in connecting state */ 333 public static final int STATE_CONNECTING = 1; 334 /** The profile is in connected state */ 335 public static final int STATE_CONNECTED = 2; 336 /** The profile is in disconnecting state */ 337 public static final int STATE_DISCONNECTING = 3; 338 339 /** @hide */ 340 public static final String BLUETOOTH_SERVICE = "bluetooth"; 341 342 private static final int ADDRESS_LENGTH = 17; 343 344 /** 345 * Lazily initialized singleton. Guaranteed final after first object 346 * constructed. 347 */ 348 private static BluetoothAdapter sAdapter; 349 350 private final IBluetooth mService; 351 352 private Handler mServiceRecordHandler; 353 354 /** 355 * Get a handle to the default local Bluetooth adapter. 356 * <p>Currently Android only supports one Bluetooth adapter, but the API 357 * could be extended to support more. This will always return the default 358 * adapter. 359 * @return the default local adapter, or null if Bluetooth is not supported 360 * on this hardware platform 361 */ 362 public static synchronized BluetoothAdapter getDefaultAdapter() { 363 if (sAdapter == null) { 364 IBinder b = ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE); 365 if (b != null) { 366 IBluetooth service = IBluetooth.Stub.asInterface(b); 367 sAdapter = new BluetoothAdapter(service); 368 } 369 } 370 return sAdapter; 371 } 372 373 /** 374 * Use {@link #getDefaultAdapter} to get the BluetoothAdapter instance. 375 * @hide 376 */ 377 public BluetoothAdapter(IBluetooth service) { 378 if (service == null) { 379 throw new IllegalArgumentException("service is null"); 380 } 381 mService = service; 382 mServiceRecordHandler = null; 383 } 384 385 /** 386 * Get a {@link BluetoothDevice} object for the given Bluetooth hardware 387 * address. 388 * <p>Valid Bluetooth hardware addresses must be upper case, in a format 389 * such as "00:11:22:33:AA:BB". The helper {@link #checkBluetoothAddress} is 390 * available to validate a Bluetooth address. 391 * <p>A {@link BluetoothDevice} will always be returned for a valid 392 * hardware address, even if this adapter has never seen that device. 393 * 394 * @param address valid Bluetooth MAC address 395 * @throws IllegalArgumentException if address is invalid 396 */ 397 public BluetoothDevice getRemoteDevice(String address) { 398 return new BluetoothDevice(address); 399 } 400 401 /** 402 * Get a {@link BluetoothDevice} object for the given Bluetooth hardware 403 * address. 404 * <p>Valid Bluetooth hardware addresses must be 6 bytes. This method 405 * expects the address in network byte order (MSB first). 406 * <p>A {@link BluetoothDevice} will always be returned for a valid 407 * hardware address, even if this adapter has never seen that device. 408 * 409 * @param address Bluetooth MAC address (6 bytes) 410 * @throws IllegalArgumentException if address is invalid 411 */ 412 public BluetoothDevice getRemoteDevice(byte[] address) { 413 if (address == null || address.length != 6) { 414 throw new IllegalArgumentException("Bluetooth address must have 6 bytes"); 415 } 416 return new BluetoothDevice(String.format("%02X:%02X:%02X:%02X:%02X:%02X", 417 address[0], address[1], address[2], address[3], address[4], address[5])); 418 } 419 420 /** 421 * Return true if Bluetooth is currently enabled and ready for use. 422 * <p>Equivalent to: 423 * <code>getBluetoothState() == STATE_ON</code> 424 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 425 * 426 * @return true if the local adapter is turned on 427 */ 428 public boolean isEnabled() { 429 try { 430 return mService.isEnabled(); 431 } catch (RemoteException e) {Log.e(TAG, "", e);} 432 return false; 433 } 434 435 /** 436 * Get the current state of the local Bluetooth adapter. 437 * <p>Possible return values are 438 * {@link #STATE_OFF}, 439 * {@link #STATE_TURNING_ON}, 440 * {@link #STATE_ON}, 441 * {@link #STATE_TURNING_OFF}. 442 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 443 * 444 * @return current state of Bluetooth adapter 445 */ 446 public int getState() { 447 try { 448 return mService.getBluetoothState(); 449 } catch (RemoteException e) {Log.e(TAG, "", e);} 450 return STATE_OFF; 451 } 452 453 /** 454 * Turn on the local Bluetooth adapter—do not use without explicit 455 * user action to turn on Bluetooth. 456 * <p>This powers on the underlying Bluetooth hardware, and starts all 457 * Bluetooth system services. 458 * <p class="caution"><strong>Bluetooth should never be enabled without 459 * direct user consent</strong>. If you want to turn on Bluetooth in order 460 * to create a wireless connection, you should use the {@link 461 * #ACTION_REQUEST_ENABLE} Intent, which will raise a dialog that requests 462 * user permission to turn on Bluetooth. The {@link #enable()} method is 463 * provided only for applications that include a user interface for changing 464 * system settings, such as a "power manager" app.</p> 465 * <p>This is an asynchronous call: it will return immediately, and 466 * clients should listen for {@link #ACTION_STATE_CHANGED} 467 * to be notified of subsequent adapter state changes. If this call returns 468 * true, then the adapter state will immediately transition from {@link 469 * #STATE_OFF} to {@link #STATE_TURNING_ON}, and some time 470 * later transition to either {@link #STATE_OFF} or {@link 471 * #STATE_ON}. If this call returns false then there was an 472 * immediate problem that will prevent the adapter from being turned on - 473 * such as Airplane mode, or the adapter is already turned on. 474 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 475 * permission 476 * 477 * @return true to indicate adapter startup has begun, or false on 478 * immediate error 479 */ 480 public boolean enable() { 481 try { 482 return mService.enable(); 483 } catch (RemoteException e) {Log.e(TAG, "", e);} 484 return false; 485 } 486 487 /** 488 * Turn off the local Bluetooth adapter—do not use without explicit 489 * user action to turn off Bluetooth. 490 * <p>This gracefully shuts down all Bluetooth connections, stops Bluetooth 491 * system services, and powers down the underlying Bluetooth hardware. 492 * <p class="caution"><strong>Bluetooth should never be disabled without 493 * direct user consent</strong>. The {@link #disable()} method is 494 * provided only for applications that include a user interface for changing 495 * system settings, such as a "power manager" app.</p> 496 * <p>This is an asynchronous call: it will return immediately, and 497 * clients should listen for {@link #ACTION_STATE_CHANGED} 498 * to be notified of subsequent adapter state changes. If this call returns 499 * true, then the adapter state will immediately transition from {@link 500 * #STATE_ON} to {@link #STATE_TURNING_OFF}, and some time 501 * later transition to either {@link #STATE_OFF} or {@link 502 * #STATE_ON}. If this call returns false then there was an 503 * immediate problem that will prevent the adapter from being turned off - 504 * such as the adapter already being turned off. 505 * <p>Requires the {@link android.Manifest.permission#BLUETOOTH_ADMIN} 506 * permission 507 * 508 * @return true to indicate adapter shutdown has begun, or false on 509 * immediate error 510 */ 511 public boolean disable() { 512 try { 513 return mService.disable(true); 514 } catch (RemoteException e) {Log.e(TAG, "", e);} 515 return false; 516 } 517 518 /** 519 * Returns the hardware address of the local Bluetooth adapter. 520 * <p>For example, "00:11:22:AA:BB:CC". 521 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 522 * 523 * @return Bluetooth hardware address as string 524 */ 525 public String getAddress() { 526 try { 527 return mService.getAddress(); 528 } catch (RemoteException e) {Log.e(TAG, "", e);} 529 return null; 530 } 531 532 /** 533 * Get the friendly Bluetooth name of the local Bluetooth adapter. 534 * <p>This name is visible to remote Bluetooth devices. 535 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 536 * 537 * @return the Bluetooth name, or null on error 538 */ 539 public String getName() { 540 try { 541 return mService.getName(); 542 } catch (RemoteException e) {Log.e(TAG, "", e);} 543 return null; 544 } 545 546 /** 547 * Get the UUIDs supported by the local Bluetooth adapter. 548 * 549 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 550 * 551 * @return the UUIDs supported by the local Bluetooth Adapter. 552 * @hide 553 */ 554 public ParcelUuid[] getUuids() { 555 if (getState() != STATE_ON) return null; 556 try { 557 return mService.getUuids(); 558 } catch (RemoteException e) {Log.e(TAG, "", e);} 559 return null; 560 } 561 562 /** 563 * Set the friendly Bluetooth name of the local Bluetooth adapter. 564 * <p>This name is visible to remote Bluetooth devices. 565 * <p>Valid Bluetooth names are a maximum of 248 bytes using UTF-8 566 * encoding, although many remote devices can only display the first 567 * 40 characters, and some may be limited to just 20. 568 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 569 * will return false. After turning on Bluetooth, 570 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 571 * to get the updated value. 572 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 573 * 574 * @param name a valid Bluetooth name 575 * @return true if the name was set, false otherwise 576 */ 577 public boolean setName(String name) { 578 if (getState() != STATE_ON) return false; 579 try { 580 return mService.setName(name); 581 } catch (RemoteException e) {Log.e(TAG, "", e);} 582 return false; 583 } 584 585 /** 586 * Get the current Bluetooth scan mode of the local Bluetooth adapter. 587 * <p>The Bluetooth scan mode determines if the local adapter is 588 * connectable and/or discoverable from remote Bluetooth devices. 589 * <p>Possible values are: 590 * {@link #SCAN_MODE_NONE}, 591 * {@link #SCAN_MODE_CONNECTABLE}, 592 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 593 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 594 * will return {@link #SCAN_MODE_NONE}. After turning on Bluetooth, 595 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 596 * to get the updated value. 597 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 598 * 599 * @return scan mode 600 */ 601 public int getScanMode() { 602 if (getState() != STATE_ON) return SCAN_MODE_NONE; 603 try { 604 return mService.getScanMode(); 605 } catch (RemoteException e) {Log.e(TAG, "", e);} 606 return SCAN_MODE_NONE; 607 } 608 609 /** 610 * Set the Bluetooth scan mode of the local Bluetooth adapter. 611 * <p>The Bluetooth scan mode determines if the local adapter is 612 * connectable and/or discoverable from remote Bluetooth devices. 613 * <p>For privacy reasons, discoverable mode is automatically turned off 614 * after <code>duration</code> seconds. For example, 120 seconds should be 615 * enough for a remote device to initiate and complete its discovery 616 * process. 617 * <p>Valid scan mode values are: 618 * {@link #SCAN_MODE_NONE}, 619 * {@link #SCAN_MODE_CONNECTABLE}, 620 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. 621 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 622 * will return false. After turning on Bluetooth, 623 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 624 * to get the updated value. 625 * <p>Requires {@link android.Manifest.permission#WRITE_SECURE_SETTINGS} 626 * <p>Applications cannot set the scan mode. They should use 627 * <code>startActivityForResult( 628 * BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE}) 629 * </code>instead. 630 * 631 * @param mode valid scan mode 632 * @param duration time in seconds to apply scan mode, only used for 633 * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE} 634 * @return true if the scan mode was set, false otherwise 635 * @hide 636 */ 637 public boolean setScanMode(int mode, int duration) { 638 if (getState() != STATE_ON) return false; 639 try { 640 return mService.setScanMode(mode, duration); 641 } catch (RemoteException e) {Log.e(TAG, "", e);} 642 return false; 643 } 644 645 /** @hide */ 646 public boolean setScanMode(int mode) { 647 if (getState() != STATE_ON) return false; 648 return setScanMode(mode, 120); 649 } 650 651 /** @hide */ 652 public int getDiscoverableTimeout() { 653 if (getState() != STATE_ON) return -1; 654 try { 655 return mService.getDiscoverableTimeout(); 656 } catch (RemoteException e) {Log.e(TAG, "", e);} 657 return -1; 658 } 659 660 /** @hide */ 661 public void setDiscoverableTimeout(int timeout) { 662 if (getState() != STATE_ON) return; 663 try { 664 mService.setDiscoverableTimeout(timeout); 665 } catch (RemoteException e) {Log.e(TAG, "", e);} 666 } 667 668 /** 669 * Start the remote device discovery process. 670 * <p>The discovery process usually involves an inquiry scan of about 12 671 * seconds, followed by a page scan of each new device to retrieve its 672 * Bluetooth name. 673 * <p>This is an asynchronous call, it will return immediately. Register 674 * for {@link #ACTION_DISCOVERY_STARTED} and {@link 675 * #ACTION_DISCOVERY_FINISHED} intents to determine exactly when the 676 * discovery starts and completes. Register for {@link 677 * BluetoothDevice#ACTION_FOUND} to be notified as remote Bluetooth devices 678 * are found. 679 * <p>Device discovery is a heavyweight procedure. New connections to 680 * remote Bluetooth devices should not be attempted while discovery is in 681 * progress, and existing connections will experience limited bandwidth 682 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 683 * discovery. Discovery is not managed by the Activity, 684 * but is run as a system service, so an application should always call 685 * {@link BluetoothAdapter#cancelDiscovery()} even if it 686 * did not directly request a discovery, just to be sure. 687 * <p>Device discovery will only find remote devices that are currently 688 * <i>discoverable</i> (inquiry scan enabled). Many Bluetooth devices are 689 * not discoverable by default, and need to be entered into a special mode. 690 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 691 * will return false. After turning on Bluetooth, 692 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 693 * to get the updated value. 694 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 695 * 696 * @return true on success, false on error 697 */ 698 public boolean startDiscovery() { 699 if (getState() != STATE_ON) return false; 700 try { 701 return mService.startDiscovery(); 702 } catch (RemoteException e) {Log.e(TAG, "", e);} 703 return false; 704 } 705 706 /** 707 * Cancel the current device discovery process. 708 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. 709 * <p>Because discovery is a heavyweight procedure for the Bluetooth 710 * adapter, this method should always be called before attempting to connect 711 * to a remote device with {@link 712 * android.bluetooth.BluetoothSocket#connect()}. Discovery is not managed by 713 * the Activity, but is run as a system service, so an application should 714 * always call cancel discovery even if it did not directly request a 715 * discovery, just to be sure. 716 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 717 * will return false. After turning on Bluetooth, 718 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 719 * to get the updated value. 720 * 721 * @return true on success, false on error 722 */ 723 public boolean cancelDiscovery() { 724 if (getState() != STATE_ON) return false; 725 try { 726 return mService.cancelDiscovery(); 727 } catch (RemoteException e) {Log.e(TAG, "", e);} 728 return false; 729 } 730 731 /** 732 * Return true if the local Bluetooth adapter is currently in the device 733 * discovery process. 734 * <p>Device discovery is a heavyweight procedure. New connections to 735 * remote Bluetooth devices should not be attempted while discovery is in 736 * progress, and existing connections will experience limited bandwidth 737 * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing 738 * discovery. 739 * <p>Applications can also register for {@link #ACTION_DISCOVERY_STARTED} 740 * or {@link #ACTION_DISCOVERY_FINISHED} to be notified when discovery 741 * starts or completes. 742 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 743 * will return false. After turning on Bluetooth, 744 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 745 * to get the updated value. 746 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 747 * 748 * @return true if discovering 749 */ 750 public boolean isDiscovering() { 751 if (getState() != STATE_ON) return false; 752 try { 753 return mService.isDiscovering(); 754 } catch (RemoteException e) {Log.e(TAG, "", e);} 755 return false; 756 } 757 758 /** 759 * Return the set of {@link BluetoothDevice} objects that are bonded 760 * (paired) to the local adapter. 761 * <p>If Bluetooth state is not {@link #STATE_ON}, this API 762 * will return an empty set. After turning on Bluetooth, 763 * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} 764 * to get the updated value. 765 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 766 * 767 * @return unmodifiable set of {@link BluetoothDevice}, or null on error 768 */ 769 public Set<BluetoothDevice> getBondedDevices() { 770 if (getState() != STATE_ON) { 771 return toDeviceSet(new String[0]); 772 } 773 try { 774 return toDeviceSet(mService.listBonds()); 775 } catch (RemoteException e) {Log.e(TAG, "", e);} 776 return null; 777 } 778 779 /** 780 * Get the current connection state of the local Bluetooth adapter. 781 * This can be used to check whether the local Bluetooth adapter is connected 782 * to any profile of any other remote Bluetooth Device. 783 * 784 * <p> Use this function along with {@link #ACTION_CONNECTION_STATE_CHANGED} 785 * intent to get the connection state of the adapter. 786 * 787 * @return One of {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTED}, 788 * {@link #STATE_CONNECTING} or {@link #STATE_DISCONNECTED} 789 * 790 * @hide 791 */ 792 public int getConnectionState() { 793 if (getState() != STATE_ON) return BluetoothAdapter.STATE_DISCONNECTED; 794 try { 795 return mService.getAdapterConnectionState(); 796 } catch (RemoteException e) {Log.e(TAG, "getConnectionState:", e);} 797 return BluetoothAdapter.STATE_DISCONNECTED; 798 } 799 800 /** 801 * Get the current connection state of a profile. 802 * This function can be used to check whether the local Bluetooth adapter 803 * is connected to any remote device for a specific profile. 804 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET}, 805 * {@link BluetoothProfile#A2DP}. 806 * 807 * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. 808 * 809 * <p> Return value can be one of 810 * {@link BluetoothProfile#STATE_DISCONNECTED}, 811 * {@link BluetoothProfile#STATE_CONNECTING}, 812 * {@link BluetoothProfile#STATE_CONNECTED}, 813 * {@link BluetoothProfile#STATE_DISCONNECTING} 814 */ 815 public int getProfileConnectionState(int profile) { 816 if (getState() != STATE_ON) return BluetoothProfile.STATE_DISCONNECTED; 817 try { 818 return mService.getProfileConnectionState(profile); 819 } catch (RemoteException e) { 820 Log.e(TAG, "getProfileConnectionState:", e); 821 } 822 return BluetoothProfile.STATE_DISCONNECTED; 823 } 824 825 /** 826 /** 827 * Picks RFCOMM channels until none are left. 828 * Avoids reserved channels. 829 */ 830 private static class RfcommChannelPicker { 831 private static final int[] RESERVED_RFCOMM_CHANNELS = new int[] { 832 10, // HFAG 833 11, // HSAG 834 12, // OPUSH 835 19, // PBAP 836 }; 837 private static LinkedList<Integer> sChannels; // master list of non-reserved channels 838 private static Random sRandom; 839 840 private final LinkedList<Integer> mChannels; // local list of channels left to try 841 842 private final UUID mUuid; 843 844 public RfcommChannelPicker(UUID uuid) { 845 synchronized (RfcommChannelPicker.class) { 846 if (sChannels == null) { 847 // lazy initialization of non-reserved rfcomm channels 848 sChannels = new LinkedList<Integer>(); 849 for (int i = 1; i <= BluetoothSocket.MAX_RFCOMM_CHANNEL; i++) { 850 sChannels.addLast(new Integer(i)); 851 } 852 for (int reserved : RESERVED_RFCOMM_CHANNELS) { 853 sChannels.remove(new Integer(reserved)); 854 } 855 sRandom = new Random(); 856 } 857 mChannels = (LinkedList<Integer>)sChannels.clone(); 858 } 859 mUuid = uuid; 860 } 861 /* Returns next random channel, or -1 if we're out */ 862 public int nextChannel() { 863 if (mChannels.size() == 0) { 864 return -1; 865 } 866 return mChannels.remove(sRandom.nextInt(mChannels.size())); 867 } 868 } 869 870 /** 871 * Create a listening, secure RFCOMM Bluetooth socket. 872 * <p>A remote device connecting to this socket will be authenticated and 873 * communication on this socket will be encrypted. 874 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 875 * connections from a listening {@link BluetoothServerSocket}. 876 * <p>Valid RFCOMM channels are in range 1 to 30. 877 * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} 878 * @param channel RFCOMM channel to listen on 879 * @return a listening RFCOMM BluetoothServerSocket 880 * @throws IOException on error, for example Bluetooth not available, or 881 * insufficient permissions, or channel in use. 882 * @hide 883 */ 884 public BluetoothServerSocket listenUsingRfcommOn(int channel) throws IOException { 885 BluetoothServerSocket socket = new BluetoothServerSocket( 886 BluetoothSocket.TYPE_RFCOMM, true, true, channel); 887 int errno = socket.mSocket.bindListen(); 888 if (errno != 0) { 889 try { 890 socket.close(); 891 } catch (IOException e) {} 892 socket.mSocket.throwErrnoNative(errno); 893 } 894 return socket; 895 } 896 897 /** 898 * Create a listening, secure RFCOMM Bluetooth socket with Service Record. 899 * <p>A remote device connecting to this socket will be authenticated and 900 * communication on this socket will be encrypted. 901 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 902 * connections from a listening {@link BluetoothServerSocket}. 903 * <p>The system will assign an unused RFCOMM channel to listen on. 904 * <p>The system will also register a Service Discovery 905 * Protocol (SDP) record with the local SDP server containing the specified 906 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 907 * can use the same UUID to query our SDP server and discover which channel 908 * to connect to. This SDP record will be removed when this socket is 909 * closed, or if this application closes unexpectedly. 910 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 911 * connect to this socket from another device using the same {@link UUID}. 912 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 913 * @param name service name for SDP record 914 * @param uuid uuid for SDP record 915 * @return a listening RFCOMM BluetoothServerSocket 916 * @throws IOException on error, for example Bluetooth not available, or 917 * insufficient permissions, or channel in use. 918 */ 919 public BluetoothServerSocket listenUsingRfcommWithServiceRecord(String name, UUID uuid) 920 throws IOException { 921 return createNewRfcommSocketAndRecord(name, uuid, true, true); 922 } 923 924 /** 925 * Create a listening, insecure RFCOMM Bluetooth socket with Service Record. 926 * <p>The link key is not required to be authenticated, i.e the communication may be 927 * vulnerable to Man In the Middle attacks. For Bluetooth 2.1 devices, 928 * the link will be encrypted, as encryption is mandartory. 929 * For legacy devices (pre Bluetooth 2.1 devices) the link will not 930 * be encrypted. Use {@link #listenUsingRfcommWithServiceRecord}, if an 931 * encrypted and authenticated communication channel is desired. 932 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 933 * connections from a listening {@link BluetoothServerSocket}. 934 * <p>The system will assign an unused RFCOMM channel to listen on. 935 * <p>The system will also register a Service Discovery 936 * Protocol (SDP) record with the local SDP server containing the specified 937 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 938 * can use the same UUID to query our SDP server and discover which channel 939 * to connect to. This SDP record will be removed when this socket is 940 * closed, or if this application closes unexpectedly. 941 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 942 * connect to this socket from another device using the same {@link UUID}. 943 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 944 * @param name service name for SDP record 945 * @param uuid uuid for SDP record 946 * @return a listening RFCOMM BluetoothServerSocket 947 * @throws IOException on error, for example Bluetooth not available, or 948 * insufficient permissions, or channel in use. 949 */ 950 public BluetoothServerSocket listenUsingInsecureRfcommWithServiceRecord(String name, UUID uuid) 951 throws IOException { 952 return createNewRfcommSocketAndRecord(name, uuid, false, false); 953 } 954 955 /** 956 * Create a listening, encrypted, 957 * RFCOMM Bluetooth socket with Service Record. 958 * <p>The link will be encrypted, but the link key is not required to be authenticated 959 * i.e the communication is vulnerable to Man In the Middle attacks. Use 960 * {@link #listenUsingRfcommWithServiceRecord}, to ensure an authenticated link key. 961 * <p> Use this socket if authentication of link key is not possible. 962 * For example, for Bluetooth 2.1 devices, if any of the devices does not have 963 * an input and output capability or just has the ability to display a numeric key, 964 * a secure socket connection is not possible and this socket can be used. 965 * Use {@link #listenUsingInsecureRfcommWithServiceRecord}, if encryption is not required. 966 * For Bluetooth 2.1 devices, the link will be encrypted, as encryption is mandartory. 967 * For more details, refer to the Security Model section 5.2 (vol 3) of 968 * Bluetooth Core Specification version 2.1 + EDR. 969 * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming 970 * connections from a listening {@link BluetoothServerSocket}. 971 * <p>The system will assign an unused RFCOMM channel to listen on. 972 * <p>The system will also register a Service Discovery 973 * Protocol (SDP) record with the local SDP server containing the specified 974 * UUID, service name, and auto-assigned channel. Remote Bluetooth devices 975 * can use the same UUID to query our SDP server and discover which channel 976 * to connect to. This SDP record will be removed when this socket is 977 * closed, or if this application closes unexpectedly. 978 * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to 979 * connect to this socket from another device using the same {@link UUID}. 980 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 981 * @param name service name for SDP record 982 * @param uuid uuid for SDP record 983 * @return a listening RFCOMM BluetoothServerSocket 984 * @throws IOException on error, for example Bluetooth not available, or 985 * insufficient permissions, or channel in use. 986 * @hide 987 */ 988 public BluetoothServerSocket listenUsingEncryptedRfcommWithServiceRecord( 989 String name, UUID uuid) throws IOException { 990 return createNewRfcommSocketAndRecord(name, uuid, false, true); 991 } 992 993 private BluetoothServerSocket createNewRfcommSocketAndRecord(String name, UUID uuid, 994 boolean auth, boolean encrypt) throws IOException { 995 RfcommChannelPicker picker = new RfcommChannelPicker(uuid); 996 997 BluetoothServerSocket socket; 998 int channel; 999 int errno; 1000 while (true) { 1001 channel = picker.nextChannel(); 1002 1003 if (channel == -1) { 1004 throw new IOException("No available channels"); 1005 } 1006 1007 socket = new BluetoothServerSocket( 1008 BluetoothSocket.TYPE_RFCOMM, auth, encrypt, channel); 1009 errno = socket.mSocket.bindListen(); 1010 if (errno == 0) { 1011 if (DBG) Log.d(TAG, "listening on RFCOMM channel " + channel); 1012 break; // success 1013 } else if (errno == BluetoothSocket.EADDRINUSE) { 1014 if (DBG) Log.d(TAG, "RFCOMM channel " + channel + " in use"); 1015 try { 1016 socket.close(); 1017 } catch (IOException e) {} 1018 continue; // try another channel 1019 } else { 1020 try { 1021 socket.close(); 1022 } catch (IOException e) {} 1023 socket.mSocket.throwErrnoNative(errno); // Exception as a result of bindListen() 1024 } 1025 } 1026 1027 int handle = -1; 1028 try { 1029 handle = mService.addRfcommServiceRecord(name, new ParcelUuid(uuid), channel, 1030 new Binder()); 1031 } catch (RemoteException e) {Log.e(TAG, "", e);} 1032 if (handle == -1) { 1033 try { 1034 socket.close(); 1035 } catch (IOException e) {} 1036 throw new IOException("Not able to register SDP record for " + name); 1037 } 1038 1039 if (mServiceRecordHandler == null) { 1040 mServiceRecordHandler = new Handler(Looper.getMainLooper()) { 1041 public void handleMessage(Message msg) { 1042 /* handle socket closing */ 1043 int handle = msg.what; 1044 try { 1045 if (DBG) Log.d(TAG, "Removing service record " + 1046 Integer.toHexString(handle)); 1047 mService.removeServiceRecord(handle); 1048 } catch (RemoteException e) {Log.e(TAG, "", e);} 1049 } 1050 }; 1051 } 1052 socket.setCloseHandler(mServiceRecordHandler, handle); 1053 return socket; 1054 } 1055 1056 1057 /** 1058 * Construct an unencrypted, unauthenticated, RFCOMM server socket. 1059 * Call #accept to retrieve connections to this socket. 1060 * @return An RFCOMM BluetoothServerSocket 1061 * @throws IOException On error, for example Bluetooth not available, or 1062 * insufficient permissions. 1063 * @hide 1064 */ 1065 public BluetoothServerSocket listenUsingInsecureRfcommOn(int port) throws IOException { 1066 BluetoothServerSocket socket = new BluetoothServerSocket( 1067 BluetoothSocket.TYPE_RFCOMM, false, false, port); 1068 int errno = socket.mSocket.bindListen(); 1069 if (errno != 0) { 1070 try { 1071 socket.close(); 1072 } catch (IOException e) {} 1073 socket.mSocket.throwErrnoNative(errno); 1074 } 1075 return socket; 1076 } 1077 1078 /** 1079 * Construct an encrypted, RFCOMM server socket. 1080 * Call #accept to retrieve connections to this socket. 1081 * @return An RFCOMM BluetoothServerSocket 1082 * @throws IOException On error, for example Bluetooth not available, or 1083 * insufficient permissions. 1084 * @hide 1085 */ 1086 public BluetoothServerSocket listenUsingEncryptedRfcommOn(int port) 1087 throws IOException { 1088 BluetoothServerSocket socket = new BluetoothServerSocket( 1089 BluetoothSocket.TYPE_RFCOMM, false, true, port); 1090 int errno = socket.mSocket.bindListen(); 1091 if (errno != 0) { 1092 try { 1093 socket.close(); 1094 } catch (IOException e) {} 1095 socket.mSocket.throwErrnoNative(errno); 1096 } 1097 return socket; 1098 } 1099 1100 /** 1101 * Construct a SCO server socket. 1102 * Call #accept to retrieve connections to this socket. 1103 * @return A SCO BluetoothServerSocket 1104 * @throws IOException On error, for example Bluetooth not available, or 1105 * insufficient permissions. 1106 * @hide 1107 */ 1108 public static BluetoothServerSocket listenUsingScoOn() throws IOException { 1109 BluetoothServerSocket socket = new BluetoothServerSocket( 1110 BluetoothSocket.TYPE_SCO, false, false, -1); 1111 int errno = socket.mSocket.bindListen(); 1112 if (errno != 0) { 1113 try { 1114 socket.close(); 1115 } catch (IOException e) {} 1116 socket.mSocket.throwErrnoNative(errno); 1117 } 1118 return socket; 1119 } 1120 1121 /** 1122 * Read the local Out of Band Pairing Data 1123 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1124 * 1125 * @return Pair<byte[], byte[]> of Hash and Randomizer 1126 * 1127 * @hide 1128 */ 1129 public Pair<byte[], byte[]> readOutOfBandData() { 1130 if (getState() != STATE_ON) return null; 1131 try { 1132 byte[] hash; 1133 byte[] randomizer; 1134 1135 byte[] ret = mService.readOutOfBandData(); 1136 1137 if (ret == null || ret.length != 32) return null; 1138 1139 hash = Arrays.copyOfRange(ret, 0, 16); 1140 randomizer = Arrays.copyOfRange(ret, 16, 32); 1141 1142 if (DBG) { 1143 Log.d(TAG, "readOutOfBandData:" + Arrays.toString(hash) + 1144 ":" + Arrays.toString(randomizer)); 1145 } 1146 return new Pair<byte[], byte[]>(hash, randomizer); 1147 1148 } catch (RemoteException e) {Log.e(TAG, "", e);} 1149 return null; 1150 } 1151 1152 /** 1153 * Get the profile proxy object associated with the profile. 1154 * 1155 * <p>Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1156 * {@link BluetoothProfile#A2DP}. Clients must implements 1157 * {@link BluetoothProfile.ServiceListener} to get notified of 1158 * the connection status and to get the proxy object. 1159 * 1160 * @param context Context of the application 1161 * @param listener The service Listener for connection callbacks. 1162 * @param profile The Bluetooth profile; either {@link BluetoothProfile#HEALTH}, 1163 * {@link BluetoothProfile#HEADSET} or {@link BluetoothProfile#A2DP}. 1164 * @return true on success, false on error 1165 */ 1166 public boolean getProfileProxy(Context context, BluetoothProfile.ServiceListener listener, 1167 int profile) { 1168 if (context == null || listener == null) return false; 1169 1170 if (profile == BluetoothProfile.HEADSET) { 1171 BluetoothHeadset headset = new BluetoothHeadset(context, listener); 1172 return true; 1173 } else if (profile == BluetoothProfile.A2DP) { 1174 BluetoothA2dp a2dp = new BluetoothA2dp(context, listener); 1175 return true; 1176 } else if (profile == BluetoothProfile.INPUT_DEVICE) { 1177 BluetoothInputDevice iDev = new BluetoothInputDevice(context, listener); 1178 return true; 1179 } else if (profile == BluetoothProfile.PAN) { 1180 BluetoothPan pan = new BluetoothPan(context, listener); 1181 return true; 1182 } else if (profile == BluetoothProfile.HEALTH) { 1183 BluetoothHealth health = new BluetoothHealth(context, listener); 1184 return true; 1185 } else { 1186 return false; 1187 } 1188 } 1189 1190 /** 1191 * Close the connection of the profile proxy to the Service. 1192 * 1193 * <p> Clients should call this when they are no longer using 1194 * the proxy obtained from {@link #getProfileProxy}. 1195 * Profile can be one of {@link BluetoothProfile#HEALTH}, {@link BluetoothProfile#HEADSET} or 1196 * {@link BluetoothProfile#A2DP} 1197 * 1198 * @param profile 1199 * @param proxy Profile proxy object 1200 */ 1201 public void closeProfileProxy(int profile, BluetoothProfile proxy) { 1202 if (proxy == null) return; 1203 1204 switch (profile) { 1205 case BluetoothProfile.HEADSET: 1206 BluetoothHeadset headset = (BluetoothHeadset)proxy; 1207 headset.close(); 1208 break; 1209 case BluetoothProfile.A2DP: 1210 BluetoothA2dp a2dp = (BluetoothA2dp)proxy; 1211 a2dp.close(); 1212 break; 1213 case BluetoothProfile.INPUT_DEVICE: 1214 BluetoothInputDevice iDev = (BluetoothInputDevice)proxy; 1215 iDev.close(); 1216 break; 1217 case BluetoothProfile.PAN: 1218 BluetoothPan pan = (BluetoothPan)proxy; 1219 pan.close(); 1220 break; 1221 case BluetoothProfile.HEALTH: 1222 BluetoothHealth health = (BluetoothHealth)proxy; 1223 health.close(); 1224 break; 1225 } 1226 } 1227 1228 /** 1229 * Enable control of the Bluetooth Adapter for a single application. 1230 * 1231 * <p>Some applications need to use Bluetooth for short periods of time to 1232 * transfer data but don't want all the associated implications like 1233 * automatic connection to headsets etc. 1234 * 1235 * <p> Multiple applications can call this. This is reference counted and 1236 * Bluetooth disabled only when no one else is using it. There will be no UI 1237 * shown to the user while bluetooth is being enabled. Any user action will 1238 * override this call. For example, if user wants Bluetooth on and the last 1239 * user of this API wanted to disable Bluetooth, Bluetooth will not be 1240 * turned off. 1241 * 1242 * <p> This API is only meant to be used by internal applications. Third 1243 * party applications but use {@link #enable} and {@link #disable} APIs. 1244 * 1245 * <p> If this API returns true, it means the callback will be called. 1246 * The callback will be called with the current state of Bluetooth. 1247 * If the state is not what was requested, an internal error would be the 1248 * reason. If Bluetooth is already on and if this function is called to turn 1249 * it on, the api will return true and a callback will be called. 1250 * 1251 * <p>Requires {@link android.Manifest.permission#BLUETOOTH} 1252 * 1253 * @param on True for on, false for off. 1254 * @param callback The callback to notify changes to the state. 1255 * @hide 1256 */ 1257 public boolean changeApplicationBluetoothState(boolean on, 1258 BluetoothStateChangeCallback callback) { 1259 if (callback == null) return false; 1260 1261 try { 1262 return mService.changeApplicationBluetoothState(on, new 1263 StateChangeCallbackWrapper(callback), new Binder()); 1264 } catch (RemoteException e) { 1265 Log.e(TAG, "changeBluetoothState", e); 1266 } 1267 return false; 1268 } 1269 1270 /** 1271 * @hide 1272 */ 1273 public interface BluetoothStateChangeCallback { 1274 public void onBluetoothStateChange(boolean on); 1275 } 1276 1277 /** 1278 * @hide 1279 */ 1280 public class StateChangeCallbackWrapper extends IBluetoothStateChangeCallback.Stub { 1281 private BluetoothStateChangeCallback mCallback; 1282 1283 StateChangeCallbackWrapper(BluetoothStateChangeCallback 1284 callback) { 1285 mCallback = callback; 1286 } 1287 1288 @Override 1289 public void onBluetoothStateChange(boolean on) { 1290 mCallback.onBluetoothStateChange(on); 1291 } 1292 } 1293 1294 private Set<BluetoothDevice> toDeviceSet(String[] addresses) { 1295 Set<BluetoothDevice> devices = new HashSet<BluetoothDevice>(addresses.length); 1296 for (int i = 0; i < addresses.length; i++) { 1297 devices.add(getRemoteDevice(addresses[i])); 1298 } 1299 return Collections.unmodifiableSet(devices); 1300 } 1301 1302 /** 1303 * Validate a String Bluetooth address, such as "00:43:A8:23:10:F0" 1304 * <p>Alphabetic characters must be uppercase to be valid. 1305 * 1306 * @param address Bluetooth address as string 1307 * @return true if the address is valid, false otherwise 1308 */ 1309 public static boolean checkBluetoothAddress(String address) { 1310 if (address == null || address.length() != ADDRESS_LENGTH) { 1311 return false; 1312 } 1313 for (int i = 0; i < ADDRESS_LENGTH; i++) { 1314 char c = address.charAt(i); 1315 switch (i % 3) { 1316 case 0: 1317 case 1: 1318 if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')) { 1319 // hex character, OK 1320 break; 1321 } 1322 return false; 1323 case 2: 1324 if (c == ':') { 1325 break; // OK 1326 } 1327 return false; 1328 } 1329 } 1330 return true; 1331 } 1332} 1333