diff options
Diffstat (limited to 'core/java/android/bluetooth/BluetoothAdapter.java')
| -rw-r--r-- | core/java/android/bluetooth/BluetoothAdapter.java | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/core/java/android/bluetooth/BluetoothAdapter.java b/core/java/android/bluetooth/BluetoothAdapter.java new file mode 100644 index 0000000..bd5b07c --- /dev/null +++ b/core/java/android/bluetooth/BluetoothAdapter.java @@ -0,0 +1,849 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package android.bluetooth; + +import android.annotation.SdkConstant; +import android.annotation.SdkConstant.SdkConstantType; +import android.os.Binder; +import android.os.Handler; +import android.os.IBinder; +import android.os.Message; +import android.os.ParcelUuid; +import android.os.RemoteException; +import android.os.ServiceManager; +import android.util.Log; + +import java.io.IOException; +import java.util.Collections; +import java.util.HashSet; +import java.util.LinkedList; +import java.util.Random; +import java.util.Set; +import java.util.UUID; + +/** + * Represents the local device Bluetooth adapter. The {@link BluetoothAdapter} + * lets you perform fundamental Bluetooth tasks, such as initiate + * device discovery, query a list of bonded (paired) devices, + * instantiate a {@link BluetoothDevice} using a known MAC address, and create + * a {@link BluetoothServerSocket} to listen for connection requests from other + * devices. + * + * <p>To get a {@link BluetoothAdapter} representing the local Bluetooth + * adapter, call the static {@link #getDefaultAdapter} method. + * Fundamentally, this is your starting point for all + * Bluetooth actions. Once you have the local adapter, you can get a set of + * {@link BluetoothDevice} objects representing all paired devices with + * {@link #getBondedDevices()}; start device discovery with + * {@link #startDiscovery()}; or create a {@link BluetoothServerSocket} to + * listen for incoming connection requests with + * {@link #listenUsingRfcommWithServiceRecord(String,UUID)}. + * + * <p class="note"><strong>Note:</strong> + * Most methods require the {@link android.Manifest.permission#BLUETOOTH} + * permission and some also require the + * {@link android.Manifest.permission#BLUETOOTH_ADMIN} permission. + * + * {@see BluetoothDevice} + * {@see BluetoothServerSocket} + */ +public final class BluetoothAdapter { + private static final String TAG = "BluetoothAdapter"; + private static final boolean DBG = false; + + /** + * Sentinel error value for this class. Guaranteed to not equal any other + * integer constant in this class. Provided as a convenience for functions + * that require a sentinel error value, for example: + * <p><code>Intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, + * BluetoothAdapter.ERROR)</code> + */ + public static final int ERROR = Integer.MIN_VALUE; + + /** + * Broadcast Action: The state of the local Bluetooth adapter has been + * changed. + * <p>For example, Bluetooth has been turned on or off. + * <p>Always contains the extra fields {@link #EXTRA_STATE} and {@link + * #EXTRA_PREVIOUS_STATE} containing the new and old states + * respectively. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. + */ + @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) + public static final String ACTION_STATE_CHANGED = + "android.bluetooth.adapter.action.STATE_CHANGED"; + + /** + * Used as an int extra field in {@link #ACTION_STATE_CHANGED} + * intents to request the current power state. Possible values are: + * {@link #STATE_OFF}, + * {@link #STATE_TURNING_ON}, + * {@link #STATE_ON}, + * {@link #STATE_TURNING_OFF}, + */ + public static final String EXTRA_STATE = + "android.bluetooth.adapter.extra.STATE"; + /** + * Used as an int extra field in {@link #ACTION_STATE_CHANGED} + * intents to request the previous power state. Possible values are: + * {@link #STATE_OFF}, + * {@link #STATE_TURNING_ON}, + * {@link #STATE_ON}, + * {@link #STATE_TURNING_OFF}, + */ + public static final String EXTRA_PREVIOUS_STATE = + "android.bluetooth.adapter.extra.PREVIOUS_STATE"; + + /** + * Indicates the local Bluetooth adapter is off. + */ + public static final int STATE_OFF = 10; + /** + * Indicates the local Bluetooth adapter is turning on. However local + * clients should wait for {@link #STATE_ON} before attempting to + * use the adapter. + */ + public static final int STATE_TURNING_ON = 11; + /** + * Indicates the local Bluetooth adapter is on, and ready for use. + */ + public static final int STATE_ON = 12; + /** + * Indicates the local Bluetooth adapter is turning off. Local clients + * should immediately attempt graceful disconnection of any remote links. + */ + public static final int STATE_TURNING_OFF = 13; + + /** + * Activity Action: Show a system activity that requests discoverable mode. + * <p>This activity will also request the user to turn on Bluetooth if it + * is not currently enabled. + * <p>Discoverable mode is equivalent to {@link + * #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. It allows remote devices to see + * this Bluetooth adapter when they perform a discovery. + * <p>For privacy, Android is not by default discoverable. + * <p>The sender can optionally use extra field {@link + * #EXTRA_DISCOVERABLE_DURATION} to request the duration of + * discoverability. Currently the default duration is 120 seconds, and + * maximum duration is capped at 300 seconds for each request. + * <p>Notification of the result of this activity is posted using the + * {@link android.app.Activity#onActivityResult} callback. The + * <code>resultCode</code> + * will be the duration (in seconds) of discoverability or + * {@link android.app.Activity#RESULT_CANCELED} if the user rejected + * discoverability or an error has occurred. + * <p>Applications can also listen for {@link #ACTION_SCAN_MODE_CHANGED} + * for global notification whenever the scan mode changes. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + */ + @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) + public static final String ACTION_REQUEST_DISCOVERABLE = + "android.bluetooth.adapter.action.REQUEST_DISCOVERABLE"; + + /** + * Used as an optional int extra field in {@link + * #ACTION_REQUEST_DISCOVERABLE} intents to request a specific duration + * for discoverability in seconds. The current default is 120 seconds, and + * requests over 300 seconds will be capped. These values could change. + */ + public static final String EXTRA_DISCOVERABLE_DURATION = + "android.bluetooth.adapter.extra.DISCOVERABLE_DURATION"; + + /** + * Activity Action: Show a system activity that allows the user to turn on + * Bluetooth. + * <p>This system activity will return once Bluetooth has completed turning + * on, or the user has decided not to turn Bluetooth on. + * <p>Notification of the result of this activity is posted using the + * {@link android.app.Activity#onActivityResult} callback. The + * <code>resultCode</code> + * will be {@link android.app.Activity#RESULT_OK} if Bluetooth has been + * turned on or {@link android.app.Activity#RESULT_CANCELED} if the user + * has rejected the request or an error has occurred. + * <p>Applications can also listen for {@link #ACTION_STATE_CHANGED} + * for global notification whenever Bluetooth is turned on or off. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + */ + @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) + public static final String ACTION_REQUEST_ENABLE = + "android.bluetooth.adapter.action.REQUEST_ENABLE"; + + /** + * Broadcast Action: Indicates the Bluetooth scan mode of the local Adapter + * has changed. + * <p>Always contains the extra fields {@link #EXTRA_SCAN_MODE} and {@link + * #EXTRA_PREVIOUS_SCAN_MODE} containing the new and old scan modes + * respectively. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + */ + @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) + public static final String ACTION_SCAN_MODE_CHANGED = + "android.bluetooth.adapter.action.SCAN_MODE_CHANGED"; + + /** + * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} + * intents to request the current scan mode. Possible values are: + * {@link #SCAN_MODE_NONE}, + * {@link #SCAN_MODE_CONNECTABLE}, + * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, + */ + public static final String EXTRA_SCAN_MODE = "android.bluetooth.adapter.extra.SCAN_MODE"; + /** + * Used as an int extra field in {@link #ACTION_SCAN_MODE_CHANGED} + * intents to request the previous scan mode. Possible values are: + * {@link #SCAN_MODE_NONE}, + * {@link #SCAN_MODE_CONNECTABLE}, + * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}, + */ + public static final String EXTRA_PREVIOUS_SCAN_MODE = + "android.bluetooth.adapter.extra.PREVIOUS_SCAN_MODE"; + + /** + * Indicates that both inquiry scan and page scan are disabled on the local + * Bluetooth adapter. Therefore this device is neither discoverable + * nor connectable from remote Bluetooth devices. + */ + public static final int SCAN_MODE_NONE = 20; + /** + * Indicates that inquiry scan is disabled, but page scan is enabled on the + * local Bluetooth adapter. Therefore this device is not discoverable from + * remote Bluetooth devices, but is connectable from remote devices that + * have previously discovered this device. + */ + public static final int SCAN_MODE_CONNECTABLE = 21; + /** + * Indicates that both inquiry scan and page scan are enabled on the local + * Bluetooth adapter. Therefore this device is both discoverable and + * connectable from remote Bluetooth devices. + */ + public static final int SCAN_MODE_CONNECTABLE_DISCOVERABLE = 23; + + + /** + * Broadcast Action: The local Bluetooth adapter has started the remote + * device discovery process. + * <p>This usually involves an inquiry scan of about 12 seconds, followed + * by a page scan of each new device to retrieve its Bluetooth name. + * <p>Register for {@link BluetoothDevice#ACTION_FOUND} to be notified as + * remote Bluetooth devices are found. + * <p>Device discovery is a heavyweight procedure. New connections to + * remote Bluetooth devices should not be attempted while discovery is in + * progress, and existing connections will experience limited bandwidth + * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing + * discovery. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. + */ + @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) + public static final String ACTION_DISCOVERY_STARTED = + "android.bluetooth.adapter.action.DISCOVERY_STARTED"; + /** + * Broadcast Action: The local Bluetooth adapter has finished the device + * discovery process. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. + */ + @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) + public static final String ACTION_DISCOVERY_FINISHED = + "android.bluetooth.adapter.action.DISCOVERY_FINISHED"; + + /** + * Broadcast Action: The local Bluetooth adapter has changed its friendly + * Bluetooth name. + * <p>This name is visible to remote Bluetooth devices. + * <p>Always contains the extra field {@link #EXTRA_LOCAL_NAME} containing + * the name. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. + */ + @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) + public static final String ACTION_LOCAL_NAME_CHANGED = + "android.bluetooth.adapter.action.LOCAL_NAME_CHANGED"; + /** + * Used as a String extra field in {@link #ACTION_LOCAL_NAME_CHANGED} + * intents to request the local Bluetooth name. + */ + public static final String EXTRA_LOCAL_NAME = "android.bluetooth.adapter.extra.LOCAL_NAME"; + + /** @hide */ + public static final String BLUETOOTH_SERVICE = "bluetooth"; + + private static final int ADDRESS_LENGTH = 17; + + /** + * Lazyily initialized singleton. Guaranteed final after first object + * constructed. + */ + private static BluetoothAdapter sAdapter; + + private final IBluetooth mService; + + /** + * Get a handle to the default local Bluetooth adapter. + * <p>Currently Android only supports one Bluetooth adapter, but the API + * could be extended to support more. This will always return the default + * adapter. + * @return the default local adapter, or null if Bluetooth is not supported + * on this hardware platform + */ + public static synchronized BluetoothAdapter getDefaultAdapter() { + if (sAdapter == null) { + IBinder b = ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE); + if (b != null) { + IBluetooth service = IBluetooth.Stub.asInterface(b); + sAdapter = new BluetoothAdapter(service); + } + } + return sAdapter; + } + + /** + * Use {@link #getDefaultAdapter} to get the BluetoothAdapter instance. + * @hide + */ + public BluetoothAdapter(IBluetooth service) { + if (service == null) { + throw new IllegalArgumentException("service is null"); + } + mService = service; + } + + /** + * Get a {@link BluetoothDevice} object for the given Bluetooth hardware + * address. + * <p>Valid Bluetooth hardware addresses must be upper case, in a format + * such as "00:11:22:33:AA:BB". The helper {@link #checkBluetoothAddress} is + * available to validate a Bluetooth address. + * <p>A {@link BluetoothDevice} will always be returned for a valid + * hardware address, even if this adapter has never seen that device. + * + * @param address valid Bluetooth MAC address + * @throws IllegalArgumentException if address is invalid + */ + public BluetoothDevice getRemoteDevice(String address) { + return new BluetoothDevice(address); + } + + /** + * Return true if Bluetooth is currently enabled and ready for use. + * <p>Equivalent to: + * <code>getBluetoothState() == STATE_ON</code> + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * + * @return true if the local adapter is turned on + */ + public boolean isEnabled() { + try { + return mService.isEnabled(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Get the current state of the local Bluetooth adapter. + * <p>Possible return values are + * {@link #STATE_OFF}, + * {@link #STATE_TURNING_ON}, + * {@link #STATE_ON}, + * {@link #STATE_TURNING_OFF}. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * + * @return current state of Bluetooth adapter + */ + public int getState() { + try { + return mService.getBluetoothState(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return STATE_OFF; + } + + /** + * Turn on the local Bluetooth adapter. + * <p>This powers on the underlying Bluetooth hardware, and starts all + * Bluetooth system services. + * <p>This is an asynchronous call: it will return immediately, and + * clients should listen for {@link #ACTION_STATE_CHANGED} + * to be notified of subsequent adapter state changes. If this call returns + * true, then the adapter state will immediately transition from {@link + * #STATE_OFF} to {@link #STATE_TURNING_ON}, and some time + * later transition to either {@link #STATE_OFF} or {@link + * #STATE_ON}. If this call returns false then there was an + * immediate problem that will prevent the adapter from being turned on - + * such as Airplane mode, or the adapter is already turned on. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} + * + * @return true to indicate adapter startup has begun, or false on + * immediate error + */ + public boolean enable() { + try { + return mService.enable(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Turn off the local Bluetooth adapter. + * <p>This gracefully shuts down all Bluetooth connections, stops Bluetooth + * system services, and powers down the underlying Bluetooth hardware. + * <p>This is an asynchronous call: it will return immediately, and + * clients should listen for {@link #ACTION_STATE_CHANGED} + * to be notified of subsequent adapter state changes. If this call returns + * true, then the adapter state will immediately transition from {@link + * #STATE_ON} to {@link #STATE_TURNING_OFF}, and some time + * later transition to either {@link #STATE_OFF} or {@link + * #STATE_ON}. If this call returns false then there was an + * immediate problem that will prevent the adapter from being turned off - + * such as the adapter already being turned off. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} + * + * @return true to indicate adapter shutdown has begun, or false on + * immediate error + */ + public boolean disable() { + try { + return mService.disable(true); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Returns the hardware address of the local Bluetooth adapter. + * <p>For example, "00:11:22:AA:BB:CC". + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * + * @return Bluetooth hardware address as string + */ + public String getAddress() { + try { + return mService.getAddress(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return null; + } + + /** + * Get the friendly Bluetooth name of the local Bluetooth adapter. + * <p>This name is visible to remote Bluetooth devices. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * + * @return the Bluetooth name, or null on error + */ + public String getName() { + try { + return mService.getName(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return null; + } + + /** + * Set the friendly Bluetooth name of the local Bluetoth adapter. + * <p>This name is visible to remote Bluetooth devices. + * <p>Valid Bluetooth names are a maximum of 248 UTF-8 characters, however + * many remote devices can only display the first 40 characters, and some + * may be limited to just 20. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} + * + * @param name a valid Bluetooth name + * @return true if the name was set, false otherwise + */ + public boolean setName(String name) { + try { + return mService.setName(name); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Get the current Bluetooth scan mode of the local Bluetooth adaper. + * <p>The Bluetooth scan mode determines if the local adapter is + * connectable and/or discoverable from remote Bluetooth devices. + * <p>Possible values are: + * {@link #SCAN_MODE_NONE}, + * {@link #SCAN_MODE_CONNECTABLE}, + * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * + * @return scan mode + */ + public int getScanMode() { + try { + return mService.getScanMode(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return SCAN_MODE_NONE; + } + + /** + * Set the Bluetooth scan mode of the local Bluetooth adapter. + * <p>The Bluetooth scan mode determines if the local adapter is + * connectable and/or discoverable from remote Bluetooth devices. + * <p>For privacy reasons, discoverable mode is automatically turned off + * after <code>duration</code> seconds. For example, 120 seconds should be + * enough for a remote device to initiate and complete its discovery + * process. + * <p>Valid scan mode values are: + * {@link #SCAN_MODE_NONE}, + * {@link #SCAN_MODE_CONNECTABLE}, + * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. + * <p>Requires {@link android.Manifest.permission#WRITE_SECURE_SETTINGS} + * <p>Applications cannot set the scan mode. They should use + * <code>startActivityForResult( + * BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE}) + * </code>instead. + * + * @param mode valid scan mode + * @param duration time in seconds to apply scan mode, only used for + * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE} + * @return true if the scan mode was set, false otherwise + * @hide + */ + public boolean setScanMode(int mode, int duration) { + try { + return mService.setScanMode(mode, duration); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** @hide */ + public boolean setScanMode(int mode) { + return setScanMode(mode, 120); + } + + /** @hide */ + public int getDiscoverableTimeout() { + try { + return mService.getDiscoverableTimeout(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return -1; + } + + /** @hide */ + public void setDiscoverableTimeout(int timeout) { + try { + mService.setDiscoverableTimeout(timeout); + } catch (RemoteException e) {Log.e(TAG, "", e);} + } + + /** + * Start the remote device discovery process. + * <p>The discovery process usually involves an inquiry scan of about 12 + * seconds, followed by a page scan of each new device to retrieve its + * Bluetooth name. + * <p>This is an asynchronous call, it will return immediately. Register + * for {@link #ACTION_DISCOVERY_STARTED} and {@link + * #ACTION_DISCOVERY_FINISHED} intents to determine exactly when the + * discovery starts and completes. Register for {@link + * BluetoothDevice#ACTION_FOUND} to be notified as remote Bluetooth devices + * are found. + * <p>Device discovery is a heavyweight procedure. New connections to + * remote Bluetooth devices should not be attempted while discovery is in + * progress, and existing connections will experience limited bandwidth + * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing + * discovery. + * <p>Device discovery will only find remote devices that are currently + * <i>discoverable</i> (inquiry scan enabled). Many Bluetooth devices are + * not discoverable by default, and need to be entered into a special mode. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. + * + * @return true on success, false on error + */ + public boolean startDiscovery() { + try { + return mService.startDiscovery(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Cancel the current device discovery process. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. + * + * @return true on success, false on error + */ + public boolean cancelDiscovery() { + try { + mService.cancelDiscovery(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Return true if the local Bluetooth adapter is currently in the device + * discovery process. + * <p>Device discovery is a heavyweight procedure. New connections to + * remote Bluetooth devices should not be attempted while discovery is in + * progress, and existing connections will experience limited bandwidth + * and high latency. Use {@link #cancelDiscovery()} to cancel an ongoing + * discovery. + * <p>Applications can also register for {@link #ACTION_DISCOVERY_STARTED} + * or {@link #ACTION_DISCOVERY_FINISHED} to be notified when discovery + * starts or completes. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. + * + * @return true if discovering + */ + public boolean isDiscovering() { + try { + return mService.isDiscovering(); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return false; + } + + /** + * Return the set of {@link BluetoothDevice} objects that are bonded + * (paired) to the local adapter. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. + * + * @return unmodifiable set of {@link BluetoothDevice}, or null on error + */ + public Set<BluetoothDevice> getBondedDevices() { + try { + return toDeviceSet(mService.listBonds()); + } catch (RemoteException e) {Log.e(TAG, "", e);} + return null; + } + + /** + * Picks RFCOMM channels until none are left. + * Avoids reserved channels. + */ + private static class RfcommChannelPicker { + private static final int[] RESERVED_RFCOMM_CHANNELS = new int[] { + 10, // HFAG + 11, // HSAG + 12, // OPUSH + 19, // PBAP + }; + private static LinkedList<Integer> sChannels; // master list of non-reserved channels + private static Random sRandom; + + private final LinkedList<Integer> mChannels; // local list of channels left to try + + private final UUID mUuid; + + public RfcommChannelPicker(UUID uuid) { + synchronized (RfcommChannelPicker.class) { + if (sChannels == null) { + // lazy initialization of non-reserved rfcomm channels + sChannels = new LinkedList<Integer>(); + for (int i = 1; i <= BluetoothSocket.MAX_RFCOMM_CHANNEL; i++) { + sChannels.addLast(new Integer(i)); + } + for (int reserved : RESERVED_RFCOMM_CHANNELS) { + sChannels.remove(new Integer(reserved)); + } + sRandom = new Random(); + } + mChannels = (LinkedList<Integer>)sChannels.clone(); + } + mUuid = uuid; + } + /* Returns next random channel, or -1 if we're out */ + public int nextChannel() { + if (mChannels.size() == 0) { + return -1; + } + return mChannels.remove(sRandom.nextInt(mChannels.size())); + } + } + + /** + * Create a listening, secure RFCOMM Bluetooth socket. + * <p>A remote device connecting to this socket will be authenticated and + * communication on this socket will be encrypted. + * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming + * connections from a listening {@link BluetoothServerSocket}. + * <p>Valid RFCOMM channels are in range 1 to 30. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN} + * @param channel RFCOMM channel to listen on + * @return a listening RFCOMM BluetoothServerSocket + * @throws IOException on error, for example Bluetooth not available, or + * insufficient permissions, or channel in use. + * @hide + */ + public BluetoothServerSocket listenUsingRfcommOn(int channel) throws IOException { + BluetoothServerSocket socket = new BluetoothServerSocket( + BluetoothSocket.TYPE_RFCOMM, true, true, channel); + int errno = socket.mSocket.bindListen(); + if (errno != 0) { + try { + socket.close(); + } catch (IOException e) {} + socket.mSocket.throwErrnoNative(errno); + } + return socket; + } + + /** + * Create a listening, secure RFCOMM Bluetooth socket with Service Record. + * <p>A remote device connecting to this socket will be authenticated and + * communication on this socket will be encrypted. + * <p>Use {@link BluetoothServerSocket#accept} to retrieve incoming + * connections from a listening {@link BluetoothServerSocket}. + * <p>The system will assign an unused RFCOMM channel to listen on. + * <p>The system will also register a Service Discovery + * Protocol (SDP) record with the local SDP server containing the specified + * UUID, service name, and auto-assigned channel. Remote Bluetooth devices + * can use the same UUID to query our SDP server and discover which channel + * to connect to. This SDP record will be removed when this socket is + * closed, or if this application closes unexpectedly. + * <p>Use {@link BluetoothDevice#createRfcommSocketToServiceRecord} to + * connect to this socket from another device using the same {@link UUID}. + * <p>Requires {@link android.Manifest.permission#BLUETOOTH} + * @param name service name for SDP record + * @param uuid uuid for SDP record + * @return a listening RFCOMM BluetoothServerSocket + * @throws IOException on error, for example Bluetooth not available, or + * insufficient permissions, or channel in use. + */ + public BluetoothServerSocket listenUsingRfcommWithServiceRecord(String name, UUID uuid) + throws IOException { + RfcommChannelPicker picker = new RfcommChannelPicker(uuid); + + BluetoothServerSocket socket; + int channel; + int errno; + while (true) { + channel = picker.nextChannel(); + + if (channel == -1) { + throw new IOException("No available channels"); + } + + socket = new BluetoothServerSocket( + BluetoothSocket.TYPE_RFCOMM, true, true, channel); + errno = socket.mSocket.bindListen(); + if (errno == 0) { + if (DBG) Log.d(TAG, "listening on RFCOMM channel " + channel); + break; // success + } else if (errno == BluetoothSocket.EADDRINUSE) { + if (DBG) Log.d(TAG, "RFCOMM channel " + channel + " in use"); + try { + socket.close(); + } catch (IOException e) {} + continue; // try another channel + } else { + try { + socket.close(); + } catch (IOException e) {} + socket.mSocket.throwErrnoNative(errno); // Exception as a result of bindListen() + } + } + + int handle = -1; + try { + handle = mService.addRfcommServiceRecord(name, new ParcelUuid(uuid), channel, + new Binder()); + } catch (RemoteException e) {Log.e(TAG, "", e);} + if (handle == -1) { + try { + socket.close(); + } catch (IOException e) {} + throw new IOException("Not able to register SDP record for " + name); + } + socket.setCloseHandler(mHandler, handle); + return socket; + } + + /** + * Construct an unencrypted, unauthenticated, RFCOMM server socket. + * Call #accept to retrieve connections to this socket. + * @return An RFCOMM BluetoothServerSocket + * @throws IOException On error, for example Bluetooth not available, or + * insufficient permissions. + * @hide + */ + public BluetoothServerSocket listenUsingInsecureRfcommOn(int port) throws IOException { + BluetoothServerSocket socket = new BluetoothServerSocket( + BluetoothSocket.TYPE_RFCOMM, false, false, port); + int errno = socket.mSocket.bindListen(); + if (errno != 0) { + try { + socket.close(); + } catch (IOException e) {} + socket.mSocket.throwErrnoNative(errno); + } + return socket; + } + + /** + * Construct a SCO server socket. + * Call #accept to retrieve connections to this socket. + * @return A SCO BluetoothServerSocket + * @throws IOException On error, for example Bluetooth not available, or + * insufficient permissions. + * @hide + */ + public static BluetoothServerSocket listenUsingScoOn() throws IOException { + BluetoothServerSocket socket = new BluetoothServerSocket( + BluetoothSocket.TYPE_SCO, false, false, -1); + int errno = socket.mSocket.bindListen(); + if (errno != 0) { + try { + socket.close(); + } catch (IOException e) {} + socket.mSocket.throwErrnoNative(errno); + } + return socket; + } + + private Set<BluetoothDevice> toDeviceSet(String[] addresses) { + Set<BluetoothDevice> devices = new HashSet<BluetoothDevice>(addresses.length); + for (int i = 0; i < addresses.length; i++) { + devices.add(getRemoteDevice(addresses[i])); + } + return Collections.unmodifiableSet(devices); + } + + private Handler mHandler = new Handler() { + public void handleMessage(Message msg) { + /* handle socket closing */ + int handle = msg.what; + try { + if (DBG) Log.d(TAG, "Removing service record " + Integer.toHexString(handle)); + mService.removeServiceRecord(handle); + } catch (RemoteException e) {Log.e(TAG, "", e);} + } + }; + + /** + * Validate a Bluetooth address, such as "00:43:A8:23:10:F0" + * <p>Alphabetic characters must be uppercase to be valid. + * + * @param address Bluetooth address as string + * @return true if the address is valid, false otherwise + */ + public static boolean checkBluetoothAddress(String address) { + if (address == null || address.length() != ADDRESS_LENGTH) { + return false; + } + for (int i = 0; i < ADDRESS_LENGTH; i++) { + char c = address.charAt(i); + switch (i % 3) { + case 0: + case 1: + if ((c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')) { + // hex character, OK + break; + } + return false; + case 2: + if (c == ':') { + break; // OK + } + return false; + } + } + return true; + } +} |