| /* |
| * 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.content.Context; |
| 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 android.util.Pair; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| 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. |
| * 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 discoverable by default. |
| * <p>The sender of this Intent 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. For example, an |
| * application can be notified when the device has ended discoverability. |
| * <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"; |
| |
| /** |
| * Intent used to broadcast the change in connection state of the local |
| * Bluetooth adapter to a profile of the remote device. When the adapter is |
| * not connected to any profiles of any remote devices and it attempts a |
| * connection to a profile this intent will sent. Once connected, this intent |
| * will not be sent for any more connection attempts to any profiles of any |
| * remote device. When the adapter disconnects from the last profile its |
| * connected to of any remote device, this intent will be sent. |
| * |
| * <p> This intent is useful for applications that are only concerned about |
| * whether the local adapter is connected to any profile of any device and |
| * are not really concerned about which profile. For example, an application |
| * which displays an icon to display whether Bluetooth is connected or not |
| * can use this intent. |
| * |
| * <p>This intent will have 3 extras: |
| * {@link #EXTRA_CONNECTION_STATE} - The current connection state. |
| * {@link #EXTRA_PREVIOUS_CONNECTION_STATE}- The previous connection state. |
| * {@link BluetoothDevice#EXTRA_DEVICE} - The remote device. |
| * |
| * {@link #EXTRA_CONNECTION_STATE} or {@link #EXTRA_PREVIOUS_CONNECTION_STATE} |
| * can be any of {@link #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, |
| * {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTING}. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} to receive. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_CONNECTION_STATE_CHANGED = |
| "android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED"; |
| |
| /** |
| * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} |
| * |
| * This extra represents the current connection state. |
| */ |
| public static final String EXTRA_CONNECTION_STATE = |
| "android.bluetooth.adapter.extra.CONNECTION_STATE"; |
| |
| /** |
| * Extra used by {@link #ACTION_CONNECTION_STATE_CHANGED} |
| * |
| * This extra represents the previous connection state. |
| */ |
| public static final String EXTRA_PREVIOUS_CONNECTION_STATE = |
| "android.bluetooth.adapter.extra.PREVIOUS_CONNECTION_STATE"; |
| |
| /** The profile is in disconnected state */ |
| public static final int STATE_DISCONNECTED = 0; |
| /** The profile is in connecting state */ |
| public static final int STATE_CONNECTING = 1; |
| /** The profile is in connected state */ |
| public static final int STATE_CONNECTED = 2; |
| /** The profile is in disconnecting state */ |
| public static final int STATE_DISCONNECTING = 3; |
| |
| /** @hide */ |
| public static final String BLUETOOTH_SERVICE = "bluetooth"; |
| |
| private static final int ADDRESS_LENGTH = 17; |
| |
| /** |
| * Lazily 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—do not use without explicit |
| * user action to turn on Bluetooth. |
| * <p>This powers on the underlying Bluetooth hardware, and starts all |
| * Bluetooth system services. |
| * <p class="caution"><strong>Bluetooth should never be enabled without |
| * direct user consent</strong>. If you want to turn on Bluetooth in order |
| * to create a wireless connection, you should use the {@link |
| * #ACTION_REQUEST_ENABLE} Intent, which will raise a dialog that requests |
| * user permission to turn on Bluetooth. The {@link #enable()} method is |
| * provided only for applications that include a user interface for changing |
| * system settings, such as a "power manager" app.</p> |
| * <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 the {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * permission |
| * |
| * @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—do not use without explicit |
| * user action to turn off Bluetooth. |
| * <p>This gracefully shuts down all Bluetooth connections, stops Bluetooth |
| * system services, and powers down the underlying Bluetooth hardware. |
| * <p class="caution"><strong>Bluetooth should never be disabled without |
| * direct user consent</strong>. The {@link #disable()} method is |
| * provided only for applications that include a user interface for changing |
| * system settings, such as a "power manager" app.</p> |
| * <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 the {@link android.Manifest.permission#BLUETOOTH_ADMIN} |
| * permission |
| * |
| * @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; |
| } |
| |
| /** |
| * Get the UUIDs supported by the local Bluetooth adapter. |
| * |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} |
| * |
| * @return the UUIDs supported by the local Bluetooth Adapter. |
| * @hide |
| */ |
| public ParcelUuid[] getUuids() { |
| try { |
| return mService.getUuids(); |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return null; |
| } |
| |
| /** |
| * Set the friendly Bluetooth name of the local Bluetooth adapter. |
| * <p>This name is visible to remote Bluetooth devices. |
| * <p>Valid Bluetooth names are a maximum of 248 bytes using UTF-8 |
| * encoding, although many remote devices can only display the first |
| * 40 characters, and some may be limited to just 20. |
| * <p>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return false. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <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) { |
| if (getState() != STATE_ON) return false; |
| try { |
| return mService.setName(name); |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return false; |
| } |
| |
| /** |
| * Get the current 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>Possible values are: |
| * {@link #SCAN_MODE_NONE}, |
| * {@link #SCAN_MODE_CONNECTABLE}, |
| * {@link #SCAN_MODE_CONNECTABLE_DISCOVERABLE}. |
| * <p>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return {@link #SCAN_MODE_NONE}. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} |
| * |
| * @return scan mode |
| */ |
| public int getScanMode() { |
| if (getState() != STATE_ON) return SCAN_MODE_NONE; |
| 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>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return false. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <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) { |
| if (getState() != STATE_ON) return false; |
| try { |
| return mService.setScanMode(mode, duration); |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return false; |
| } |
| |
| /** @hide */ |
| public boolean setScanMode(int mode) { |
| if (getState() != STATE_ON) return false; |
| return setScanMode(mode, 120); |
| } |
| |
| /** @hide */ |
| public int getDiscoverableTimeout() { |
| if (getState() != STATE_ON) return -1; |
| try { |
| return mService.getDiscoverableTimeout(); |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return -1; |
| } |
| |
| /** @hide */ |
| public void setDiscoverableTimeout(int timeout) { |
| if (getState() != STATE_ON) return; |
| 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. Discovery is not managed by the Activity, |
| * but is run as a system service, so an application should always call |
| * {@link BluetoothAdapter#cancelDiscovery()} even if it |
| * did not directly request a discovery, just to be sure. |
| * <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>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return false. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH_ADMIN}. |
| * |
| * @return true on success, false on error |
| */ |
| public boolean startDiscovery() { |
| if (getState() != STATE_ON) return false; |
| 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}. |
| * <p>Because discovery is a heavyweight procedure for the Bluetooth |
| * adapter, this method should always be called before attempting to connect |
| * to a remote device with {@link |
| * android.bluetooth.BluetoothSocket#connect()}. Discovery is not managed by |
| * the Activity, but is run as a system service, so an application should |
| * always call cancel discovery even if it did not directly request a |
| * discovery, just to be sure. |
| * <p>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return false. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * |
| * @return true on success, false on error |
| */ |
| public boolean cancelDiscovery() { |
| if (getState() != STATE_ON) return false; |
| try { |
| return 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>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return false. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. |
| * |
| * @return true if discovering |
| */ |
| public boolean isDiscovering() { |
| if (getState() != STATE_ON) return false; |
| 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>If Bluetooth state is not {@link #STATE_ON}, this API |
| * will return an empty set. After turning on Bluetooth, |
| * wait for {@link #ACTION_STATE_CHANGED} with {@link #STATE_ON} |
| * to get the updated value. |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH}. |
| * |
| * @return unmodifiable set of {@link BluetoothDevice}, or null on error |
| */ |
| public Set<BluetoothDevice> getBondedDevices() { |
| if (getState() != STATE_ON) { |
| return toDeviceSet(new String[0]); |
| } |
| try { |
| return toDeviceSet(mService.listBonds()); |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return null; |
| } |
| |
| /** |
| * Get the current connection state of the local Bluetooth adapter. |
| * This can be used to check whether the local Bluetooth adapter is connected |
| * to any profile of any other remote Bluetooth Device. |
| * |
| * <p> Use this function along with {@link #ACTION_CONNECTION_STATE_CHANGED} |
| * intent to get the connection state of the adapter. |
| * |
| * @return One of {@link #STATE_CONNECTED}, {@link #STATE_DISCONNECTED}, |
| * {@link #STATE_CONNECTING} or {@link #STATE_DISCONNECTED} |
| * |
| * @hide |
| */ |
| public int getConnectionState() { |
| if (getState() != STATE_ON) return BluetoothAdapter.STATE_DISCONNECTED; |
| try { |
| return mService.getAdapterConnectionState(); |
| } catch (RemoteException e) {Log.e(TAG, "getConnectionState:", e);} |
| return BluetoothAdapter.STATE_DISCONNECTED; |
| } |
| |
| /** |
| * 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 { |
| return createNewRfcommSocketAndRecord(name, uuid, true, true); |
| } |
| |
| /** |
| * Create a listening, insecure RFCOMM Bluetooth socket with Service Record. |
| * <p>The link key will be unauthenticated i.e the communication is |
| * vulnerable to Man In the Middle attacks. For Bluetooth 2.1 devices, |
| * the link key will be encrypted, as encryption is mandartory. |
| * For legacy devices (pre Bluetooth 2.1 devices) the link key will not |
| * be encrypted. Use {@link #listenUsingRfcommWithServiceRecord}, if an |
| * encrypted and authenticated communication channel is desired. |
| * <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 listenUsingInsecureRfcommWithServiceRecord(String name, UUID uuid) |
| throws IOException { |
| return createNewRfcommSocketAndRecord(name, uuid, false, false); |
| } |
| |
| private BluetoothServerSocket createNewRfcommSocketAndRecord(String name, UUID uuid, |
| boolean auth, boolean encrypt) 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, auth, encrypt, 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; |
| } |
| |
| /** |
| * Read the local Out of Band Pairing Data |
| * <p>Requires {@link android.Manifest.permission#BLUETOOTH} |
| * |
| * @return Pair<byte[], byte[]> of Hash and Randomizer |
| * |
| * @hide |
| */ |
| public Pair<byte[], byte[]> readOutOfBandData() { |
| if (getState() != STATE_ON) return null; |
| try { |
| byte[] hash; |
| byte[] randomizer; |
| |
| byte[] ret = mService.readOutOfBandData(); |
| |
| if (ret == null || ret.length != 32) return null; |
| |
| hash = Arrays.copyOfRange(ret, 0, 16); |
| randomizer = Arrays.copyOfRange(ret, 16, 32); |
| |
| if (DBG) { |
| Log.d(TAG, "readOutOfBandData:" + Arrays.toString(hash) + |
| ":" + Arrays.toString(randomizer)); |
| } |
| return new Pair<byte[], byte[]>(hash, randomizer); |
| |
| } catch (RemoteException e) {Log.e(TAG, "", e);} |
| return null; |
| } |
| |
| /** |
| * Get the profile proxy object associated with the profile. |
| * |
| * <p>Profile can be one of {@link BluetoothProfile#HEADSET} or |
| * {@link BluetoothProfile#A2DP}. Clients must implements |
| * {@link BluetoothProfile.ServiceListener} to get notified of |
| * the connection status and to get the proxy object. |
| * |
| * @param context Context of the application |
| * @param listener The service Listener for connection callbacks. |
| * @param profile The Bluetooth profile; either {@link BluetoothProfile#HEADSET} |
| * or {@link BluetoothProfile#A2DP}. |
| * @return true on success, false on error |
| */ |
| public boolean getProfileProxy(Context context, BluetoothProfile.ServiceListener listener, |
| int profile) { |
| if (context == null || listener == null) return false; |
| |
| if (profile == BluetoothProfile.HEADSET) { |
| BluetoothHeadset headset = new BluetoothHeadset(context, listener); |
| return true; |
| } else if (profile == BluetoothProfile.A2DP) { |
| BluetoothA2dp a2dp = new BluetoothA2dp(context, listener); |
| return true; |
| } else if (profile == BluetoothProfile.INPUT_DEVICE) { |
| BluetoothInputDevice iDev = new BluetoothInputDevice(context, listener); |
| return true; |
| } else if (profile == BluetoothProfile.PAN) { |
| BluetoothPan pan = new BluetoothPan(context, listener); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * Close the connection of the profile proxy to the Service. |
| * |
| * <p> Clients should call this when they are no longer using |
| * the proxy obtained from {@link #getProfileProxy}. |
| * Profile can be one of {@link BluetoothProfile#HEADSET} or |
| * {@link BluetoothProfile#A2DP} |
| * |
| * @param profile |
| * @param proxy Profile proxy object |
| */ |
| public void closeProfileProxy(int profile, BluetoothProfile proxy) { |
| if (profile == BluetoothProfile.HEADSET) { |
| BluetoothHeadset headset = (BluetoothHeadset)proxy; |
| if (headset != null) { |
| headset.close(); |
| } |
| } |
| } |
| |
| 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; |
| } |
| } |
