| /* |
| * Copyright (C) 2010 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.IBinder; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.Log; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Public API for controlling the Bluetooth HID (Input Device) Profile |
| * |
| * BluetoothInputDevice is a proxy object used to make calls to Bluetooth Service |
| * which handles the HID profile. |
| * |
| * Creating a BluetoothInputDevice object will initiate a binding with the |
| * Bluetooth service. Users of this object should call close() when they |
| * are finished, so that this proxy object can unbind from the service. |
| * |
| * Currently the Bluetooth service runs in the system server and this |
| * proxy object will be immediately bound to the service on construction. |
| * |
| * @hide |
| */ |
| public final class BluetoothInputDevice { |
| private static final String TAG = "BluetoothInputDevice"; |
| private static final boolean DBG = false; |
| |
| /** int extra for ACTION_INPUT_DEVICE_STATE_CHANGED */ |
| public static final String EXTRA_INPUT_DEVICE_STATE = |
| "android.bluetooth.inputdevice.extra.INPUT_DEVICE_STATE"; |
| /** int extra for ACTION_INPUT_DEVICE_STATE_CHANGED */ |
| public static final String EXTRA_PREVIOUS_INPUT_DEVICE_STATE = |
| "android.bluetooth.inputdevice.extra.PREVIOUS_INPUT_DEVICE_STATE"; |
| |
| /** Indicates the state of an input device has changed. |
| * This intent will always contain EXTRA_INPUT_DEVICE_STATE, |
| * EXTRA_PREVIOUS_INPUT_DEVICE_STATE and BluetoothDevice.EXTRA_DEVICE |
| * extras. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_INPUT_DEVICE_STATE_CHANGED = |
| "android.bluetooth.inputdevice.action.INPUT_DEVICE_STATE_CHANGED"; |
| |
| public static final int STATE_DISCONNECTED = 0; |
| public static final int STATE_CONNECTING = 1; |
| public static final int STATE_CONNECTED = 2; |
| public static final int STATE_DISCONNECTING = 3; |
| |
| /** |
| * Auto connection, incoming and outgoing connection are allowed at this |
| * priority level. |
| */ |
| public static final int PRIORITY_AUTO_CONNECT = 1000; |
| /** |
| * Incoming and outgoing connection are allowed at this priority level |
| */ |
| public static final int PRIORITY_ON = 100; |
| /** |
| * Connections to the device are not allowed at this priority level. |
| */ |
| public static final int PRIORITY_OFF = 0; |
| /** |
| * Default priority level when the device is unpaired. |
| */ |
| public static final int PRIORITY_UNDEFINED = -1; |
| |
| private final IBluetooth mService; |
| private final Context mContext; |
| |
| /** |
| * Create a BluetoothInputDevice proxy object for interacting with the local |
| * Bluetooth Service which handle the HID profile. |
| * @param c Context |
| */ |
| public BluetoothInputDevice(Context c) { |
| mContext = c; |
| |
| IBinder b = ServiceManager.getService(BluetoothAdapter.BLUETOOTH_SERVICE); |
| if (b != null) { |
| mService = IBluetooth.Stub.asInterface(b); |
| } else { |
| Log.w(TAG, "Bluetooth Service not available!"); |
| |
| // Instead of throwing an exception which prevents people from going |
| // into Wireless settings in the emulator. Let it crash later when it is actually used. |
| mService = null; |
| } |
| } |
| |
| /** Initiate a connection to an Input device. |
| * |
| * This function returns false on error and true if the connection |
| * attempt is being made. |
| * |
| * Listen for INPUT_DEVICE_STATE_CHANGED_ACTION to find out when the |
| * connection is completed. |
| * @param device Remote BT device. |
| * @return false on immediate error, true otherwise |
| * @hide |
| */ |
| public boolean connectInputDevice(BluetoothDevice device) { |
| if (DBG) log("connectInputDevice(" + device + ")"); |
| try { |
| return mService.connectInputDevice(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return false; |
| } |
| } |
| |
| /** Initiate disconnect from an Input Device. |
| * This function return false on error and true if the disconnection |
| * attempt is being made. |
| * |
| * Listen for INPUT_DEVICE_STATE_CHANGED_ACTION to find out when |
| * disconnect is completed. |
| * |
| * @param device Remote BT device. |
| * @return false on immediate error, true otherwise |
| * @hide |
| */ |
| public boolean disconnectInputDevice(BluetoothDevice device) { |
| if (DBG) log("disconnectInputDevice(" + device + ")"); |
| try { |
| return mService.disconnectInputDevice(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return false; |
| } |
| } |
| |
| /** Check if a specified InputDevice is connected. |
| * |
| * @param device Remote BT device. |
| * @return True if connected , false otherwise and on error. |
| * @hide |
| */ |
| public boolean isInputDeviceConnected(BluetoothDevice device) { |
| if (DBG) log("isInputDeviceConnected(" + device + ")"); |
| int state = getInputDeviceState(device); |
| if (state == STATE_CONNECTED) return true; |
| return false; |
| } |
| |
| /** Check if any Input Device is connected. |
| * |
| * @return a unmodifiable set of connected Input Devices, or null on error. |
| * @hide |
| */ |
| public Set<BluetoothDevice> getConnectedInputDevices() { |
| if (DBG) log("getConnectedInputDevices()"); |
| try { |
| return Collections.unmodifiableSet( |
| new HashSet<BluetoothDevice>( |
| Arrays.asList(mService.getConnectedInputDevices()))); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return null; |
| } |
| } |
| |
| /** Get the state of an Input Device. |
| * |
| * @param device Remote BT device. |
| * @return The current state of the Input Device |
| * @hide |
| */ |
| public int getInputDeviceState(BluetoothDevice device) { |
| if (DBG) log("getInputDeviceState(" + device + ")"); |
| try { |
| return mService.getInputDeviceState(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return STATE_DISCONNECTED; |
| } |
| } |
| |
| /** |
| * Set priority of an input device. |
| * |
| * Priority is a non-negative integer. Priority can take the following |
| * values: |
| * {@link PRIORITY_ON}, {@link PRIORITY_OFF}, {@link PRIORITY_AUTO_CONNECT} |
| * |
| * @param device Paired device. |
| * @param priority Integer priority |
| * @return true if priority is set, false on error |
| */ |
| public boolean setInputDevicePriority(BluetoothDevice device, int priority) { |
| if (DBG) log("setInputDevicePriority(" + device + ", " + priority + ")"); |
| try { |
| return mService.setInputDevicePriority(device, priority); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return false; |
| } |
| } |
| |
| /** |
| * Get the priority associated with an Input Device. |
| * |
| * @param device Input Device |
| * @return non-negative priority, or negative error code on error. |
| */ |
| public int getInputDevicePriority(BluetoothDevice device) { |
| if (DBG) log("getInputDevicePriority(" + device + ")"); |
| try { |
| return mService.getInputDevicePriority(device); |
| } catch (RemoteException e) { |
| Log.e(TAG, "", e); |
| return PRIORITY_OFF; |
| } |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |