/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import android.annotation.SdkConstant;
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import android.annotation.SdkConstant.SdkConstantType;
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import android.content.Context;
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import android.os.Binder;
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import android.os.IBinder;
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import android.os.RemoteException;
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import android.util.Log;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.Executor;
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/**
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* Provides the public APIs to control the Bluetooth HID Device profile.
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*
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* <p>BluetoothHidDevice is a proxy object for controlling the Bluetooth HID Device Service via IPC.
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* Use {@link BluetoothAdapter#getProfileProxy} to get the BluetoothHidDevice proxy object.
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*/
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public final class BluetoothHidDevice implements BluetoothProfile {
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private static final String TAG = BluetoothHidDevice.class.getSimpleName();
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/**
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* Intent used to broadcast the change in connection state of the Input Host profile.
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*
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* <p>This intent will have 3 extras:
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*
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* <ul>
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* <li>{@link #EXTRA_STATE} - The current state of the profile.
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* <li>{@link #EXTRA_PREVIOUS_STATE}- The previous state of the profile.
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* <li>{@link BluetoothDevice#EXTRA_DEVICE} - The remote device.
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* </ul>
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*
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* <p>{@link #EXTRA_STATE} or {@link #EXTRA_PREVIOUS_STATE} can be any of {@link
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* #STATE_DISCONNECTED}, {@link #STATE_CONNECTING}, {@link #STATE_CONNECTED}, {@link
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* #STATE_DISCONNECTING}.
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*
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* <p>Requires {@link android.Manifest.permission#BLUETOOTH} permission to receive.
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*/
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@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
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public static final String ACTION_CONNECTION_STATE_CHANGED =
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"android.bluetooth.hiddevice.profile.action.CONNECTION_STATE_CHANGED";
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/**
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* Constant representing unspecified HID device subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS1_NONE = (byte) 0x00;
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/**
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* Constant representing keyboard subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS1_KEYBOARD = (byte) 0x40;
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/**
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* Constant representing mouse subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS1_MOUSE = (byte) 0x80;
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/**
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* Constant representing combo keyboard and mouse subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS1_COMBO = (byte) 0xC0;
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/**
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* Constant representing uncategorized HID device subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_UNCATEGORIZED = (byte) 0x00;
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/**
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* Constant representing joystick subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_JOYSTICK = (byte) 0x01;
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/**
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* Constant representing gamepad subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_GAMEPAD = (byte) 0x02;
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/**
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* Constant representing remote control subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_REMOTE_CONTROL = (byte) 0x03;
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/**
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* Constant representing sensing device subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_SENSING_DEVICE = (byte) 0x04;
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/**
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* Constant representing digitizer tablet subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_DIGITIZER_TABLET = (byte) 0x05;
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/**
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* Constant representing card reader subclass.
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*
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* @see #registerApp (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)
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*/
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public static final byte SUBCLASS2_CARD_READER = (byte) 0x06;
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/**
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* Constant representing HID Input Report type.
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*
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* @see Callback#onGetReport(BluetoothDevice, byte, byte, int)
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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* @see Callback#onInterruptData(BluetoothDevice, byte, byte[])
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*/
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public static final byte REPORT_TYPE_INPUT = (byte) 1;
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/**
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* Constant representing HID Output Report type.
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*
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* @see Callback#onGetReport(BluetoothDevice, byte, byte, int)
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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* @see Callback#onInterruptData(BluetoothDevice, byte, byte[])
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*/
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public static final byte REPORT_TYPE_OUTPUT = (byte) 2;
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/**
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* Constant representing HID Feature Report type.
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*
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* @see Callback#onGetReport(BluetoothDevice, byte, byte, int)
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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* @see Callback#onInterruptData(BluetoothDevice, byte, byte[])
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*/
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public static final byte REPORT_TYPE_FEATURE = (byte) 3;
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/**
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* Constant representing success response for Set Report.
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_SUCCESS = (byte) 0;
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/**
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* Constant representing error response for Set Report due to "not ready".
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_NOT_READY = (byte) 1;
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/**
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* Constant representing error response for Set Report due to "invalid report ID".
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_INVALID_RPT_ID = (byte) 2;
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/**
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* Constant representing error response for Set Report due to "unsupported request".
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_UNSUPPORTED_REQ = (byte) 3;
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/**
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* Constant representing error response for Set Report due to "invalid parameter".
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_INVALID_PARAM = (byte) 4;
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/**
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* Constant representing error response for Set Report with unknown reason.
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*
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* @see Callback#onSetReport(BluetoothDevice, byte, byte, byte[])
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*/
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public static final byte ERROR_RSP_UNKNOWN = (byte) 14;
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/**
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* Constant representing boot protocol mode used set by host. Default is always {@link
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* #PROTOCOL_REPORT_MODE} unless notified otherwise.
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*
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* @see Callback#onSetProtocol(BluetoothDevice, byte)
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*/
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public static final byte PROTOCOL_BOOT_MODE = (byte) 0;
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/**
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* Constant representing report protocol mode used set by host. Default is always {@link
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* #PROTOCOL_REPORT_MODE} unless notified otherwise.
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*
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* @see Callback#onSetProtocol(BluetoothDevice, byte)
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*/
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public static final byte PROTOCOL_REPORT_MODE = (byte) 1;
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/**
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* The template class that applications use to call callback functions on events from the HID
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* host. Callback functions are wrapped in this class and registered to the Android system
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* during app registration.
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*/
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public abstract static class Callback {
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private static final String TAG = "BluetoothHidDevCallback";
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/**
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* Callback called when application registration state changes. Usually it's called due to
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* either {@link BluetoothHidDevice#registerApp (String, String, String, byte, byte[],
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* Executor, Callback)} or {@link BluetoothHidDevice#unregisterApp()} , but can be also
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* unsolicited in case e.g. Bluetooth was turned off in which case application is
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* unregistered automatically.
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*
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* @param pluggedDevice {@link BluetoothDevice} object which represents host that currently
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* has Virtual Cable established with device. Only valid when application is registered,
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* can be <code>null</code>.
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* @param registered <code>true</code> if application is registered, <code>false</code>
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* otherwise.
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*/
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public void onAppStatusChanged(BluetoothDevice pluggedDevice, boolean registered) {
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Log.d(
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TAG,
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"onAppStatusChanged: pluggedDevice="
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+ pluggedDevice
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+ " registered="
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+ registered);
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}
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/**
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* Callback called when connection state with remote host was changed. Application can
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* assume than Virtual Cable is established when called with {@link
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* BluetoothProfile#STATE_CONNECTED} <code>state</code>.
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*
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* @param device {@link BluetoothDevice} object representing host device which connection
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* state was changed.
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* @param state Connection state as defined in {@link BluetoothProfile}.
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*/
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public void onConnectionStateChanged(BluetoothDevice device, int state) {
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Log.d(TAG, "onConnectionStateChanged: device=" + device + " state=" + state);
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}
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/**
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* Callback called when GET_REPORT is received from remote host. Should be replied by
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* application using {@link BluetoothHidDevice#replyReport(BluetoothDevice, byte, byte,
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* byte[])}.
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*
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* @param type Requested Report Type.
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* @param id Requested Report Id, can be 0 if no Report Id are defined in descriptor.
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* @param bufferSize Requested buffer size, application shall respond with at least given
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* number of bytes.
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*/
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public void onGetReport(BluetoothDevice device, byte type, byte id, int bufferSize) {
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Log.d(
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TAG,
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"onGetReport: device="
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+ device
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+ " type="
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+ type
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+ " id="
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+ id
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+ " bufferSize="
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+ bufferSize);
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}
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/**
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* Callback called when SET_REPORT is received from remote host. In case received data are
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* invalid, application shall respond with {@link
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* BluetoothHidDevice#reportError(BluetoothDevice, byte)}.
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*
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* @param type Report Type.
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* @param id Report Id.
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* @param data Report data.
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*/
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public void onSetReport(BluetoothDevice device, byte type, byte id, byte[] data) {
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Log.d(TAG, "onSetReport: device=" + device + " type=" + type + " id=" + id);
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}
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/**
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* Callback called when SET_PROTOCOL is received from remote host. Application shall use
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* this information to send only reports valid for given protocol mode. By default, {@link
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* BluetoothHidDevice#PROTOCOL_REPORT_MODE} shall be assumed.
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*
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* @param protocol Protocol Mode.
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*/
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public void onSetProtocol(BluetoothDevice device, byte protocol) {
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Log.d(TAG, "onSetProtocol: device=" + device + " protocol=" + protocol);
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}
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/**
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* Callback called when report data is received over interrupt channel. Report Type is
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* assumed to be {@link BluetoothHidDevice#REPORT_TYPE_OUTPUT}.
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*
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* @param reportId Report Id.
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* @param data Report data.
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*/
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public void onInterruptData(BluetoothDevice device, byte reportId, byte[] data) {
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Log.d(TAG, "onInterruptData: device=" + device + " reportId=" + reportId);
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}
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/**
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* Callback called when Virtual Cable is removed. After this callback is received connection
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* will be disconnected automatically.
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*/
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public void onVirtualCableUnplug(BluetoothDevice device) {
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Log.d(TAG, "onVirtualCableUnplug: device=" + device);
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}
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}
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private static class CallbackWrapper extends IBluetoothHidDeviceCallback.Stub {
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private final Executor mExecutor;
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private final Callback mCallback;
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CallbackWrapper(Executor executor, Callback callback) {
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mExecutor = executor;
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mCallback = callback;
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}
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@Override
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public void onAppStatusChanged(BluetoothDevice pluggedDevice, boolean registered) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onAppStatusChanged(pluggedDevice, registered));
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}
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@Override
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public void onConnectionStateChanged(BluetoothDevice device, int state) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onConnectionStateChanged(device, state));
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}
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@Override
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public void onGetReport(BluetoothDevice device, byte type, byte id, int bufferSize) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onGetReport(device, type, id, bufferSize));
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}
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@Override
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public void onSetReport(BluetoothDevice device, byte type, byte id, byte[] data) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onSetReport(device, type, id, data));
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}
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@Override
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public void onSetProtocol(BluetoothDevice device, byte protocol) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onSetProtocol(device, protocol));
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}
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@Override
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public void onInterruptData(BluetoothDevice device, byte reportId, byte[] data) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onInterruptData(device, reportId, data));
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}
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@Override
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public void onVirtualCableUnplug(BluetoothDevice device) {
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clearCallingIdentity();
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mExecutor.execute(() -> mCallback.onVirtualCableUnplug(device));
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}
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}
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private BluetoothAdapter mAdapter;
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private final BluetoothProfileConnector<IBluetoothHidDevice> mProfileConnector =
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new BluetoothProfileConnector(this, BluetoothProfile.HID_DEVICE,
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"BluetoothHidDevice", IBluetoothHidDevice.class.getName()) {
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@Override
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public IBluetoothHidDevice getServiceInterface(IBinder service) {
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return IBluetoothHidDevice.Stub.asInterface(Binder.allowBlocking(service));
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}
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};
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BluetoothHidDevice(Context context, ServiceListener listener) {
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mAdapter = BluetoothAdapter.getDefaultAdapter();
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mProfileConnector.connect(context, listener);
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}
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void close() {
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mProfileConnector.disconnect();
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}
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private IBluetoothHidDevice getService() {
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return mProfileConnector.getService();
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}
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/** {@inheritDoc} */
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@Override
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public List<BluetoothDevice> getConnectedDevices() {
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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return service.getConnectedDevices();
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return new ArrayList<>();
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}
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/** {@inheritDoc} */
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@Override
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public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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return service.getDevicesMatchingConnectionStates(states);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return new ArrayList<>();
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}
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/** {@inheritDoc} */
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@Override
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public int getConnectionState(BluetoothDevice device) {
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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return service.getConnectionState(device);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return STATE_DISCONNECTED;
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}
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/**
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* Registers application to be used for HID device. Connections to HID Device are only possible
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* when application is registered. Only one application can be registered at one time. When an
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* application is registered, the HID Host service will be disabled until it is unregistered.
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* When no longer used, application should be unregistered using {@link #unregisterApp()}. The
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* app will be automatically unregistered if it is not foreground. The registration status
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* should be tracked by the application by handling callback from Callback#onAppStatusChanged.
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* The app registration status is not related to the return value of this method.
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*
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* @param sdp {@link BluetoothHidDeviceAppSdpSettings} object of HID Device SDP record. The HID
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* Device SDP record is required.
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* @param inQos {@link BluetoothHidDeviceAppQosSettings} object of Incoming QoS Settings. The
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* Incoming QoS Settings is not required. Use null or default
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* BluetoothHidDeviceAppQosSettings.Builder for default values.
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* @param outQos {@link BluetoothHidDeviceAppQosSettings} object of Outgoing QoS Settings. The
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* Outgoing QoS Settings is not required. Use null or default
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* BluetoothHidDeviceAppQosSettings.Builder for default values.
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* @param executor {@link Executor} object on which callback will be executed. The Executor
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* object is required.
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* @param callback {@link Callback} object to which callback messages will be sent. The Callback
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* object is required.
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* @return true if the command is successfully sent; otherwise false.
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*/
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public boolean registerApp(
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BluetoothHidDeviceAppSdpSettings sdp,
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BluetoothHidDeviceAppQosSettings inQos,
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BluetoothHidDeviceAppQosSettings outQos,
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Executor executor,
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Callback callback) {
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boolean result = false;
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if (sdp == null) {
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throw new IllegalArgumentException("sdp parameter cannot be null");
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}
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if (executor == null) {
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throw new IllegalArgumentException("executor parameter cannot be null");
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}
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if (callback == null) {
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throw new IllegalArgumentException("callback parameter cannot be null");
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}
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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CallbackWrapper cbw = new CallbackWrapper(executor, callback);
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result = service.registerApp(sdp, inQos, outQos, cbw);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return result;
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}
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/**
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* Unregisters application. Active connection will be disconnected and no new connections will
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* be allowed until registered again using {@link #registerApp
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* (BluetoothHidDeviceAppQosSettings, BluetoothHidDeviceAppQosSettings,
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* BluetoothHidDeviceAppQosSettings, Executor, Callback)}. The registration status should be
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* tracked by the application by handling callback from Callback#onAppStatusChanged. The app
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* registration status is not related to the return value of this method.
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*
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* @return true if the command is successfully sent; otherwise false.
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*/
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public boolean unregisterApp() {
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boolean result = false;
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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result = service.unregisterApp();
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return result;
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}
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/**
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* Sends report to remote host using interrupt channel.
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*
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* @param id Report Id, as defined in descriptor. Can be 0 in case Report Id are not defined in
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* descriptor.
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* @param data Report data, not including Report Id.
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* @return true if the command is successfully sent; otherwise false.
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*/
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public boolean sendReport(BluetoothDevice device, int id, byte[] data) {
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boolean result = false;
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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result = service.sendReport(device, id, data);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return result;
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}
|
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/**
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* Sends report to remote host as reply for GET_REPORT request from {@link
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* Callback#onGetReport(BluetoothDevice, byte, byte, int)}.
|
*
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* @param type Report Type, as in request.
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* @param id Report Id, as in request.
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* @param data Report data, not including Report Id.
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* @return true if the command is successfully sent; otherwise false.
|
*/
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public boolean replyReport(BluetoothDevice device, byte type, byte id, byte[] data) {
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boolean result = false;
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final IBluetoothHidDevice service = getService();
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if (service != null) {
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try {
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result = service.replyReport(device, type, id, data);
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} catch (RemoteException e) {
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Log.e(TAG, e.toString());
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}
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} else {
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Log.w(TAG, "Proxy not attached to service");
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}
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return result;
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}
|
|
/**
|
* Sends error handshake message as reply for invalid SET_REPORT request from {@link
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* Callback#onSetReport(BluetoothDevice, byte, byte, byte[])}.
|
*
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* @param error Error to be sent for SET_REPORT via HANDSHAKE.
|
* @return true if the command is successfully sent; otherwise false.
|
*/
|
public boolean reportError(BluetoothDevice device, byte error) {
|
boolean result = false;
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|
final IBluetoothHidDevice service = getService();
|
if (service != null) {
|
try {
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result = service.reportError(device, error);
|
} catch (RemoteException e) {
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Log.e(TAG, e.toString());
|
}
|
} else {
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Log.w(TAG, "Proxy not attached to service");
|
}
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return result;
|
}
|
|
/**
|
* Gets the application name of the current HidDeviceService user.
|
*
|
* @return the current user name, or empty string if cannot get the name
|
* {@hide}
|
*/
|
public String getUserAppName() {
|
final IBluetoothHidDevice service = getService();
|
|
if (service != null) {
|
try {
|
return service.getUserAppName();
|
} catch (RemoteException e) {
|
Log.e(TAG, e.toString());
|
}
|
} else {
|
Log.w(TAG, "Proxy not attached to service");
|
}
|
|
return "";
|
}
|
|
/**
|
* Initiates connection to host which is currently paired with this device. If the application
|
* is not registered, #connect(BluetoothDevice) will fail. The connection state should be
|
* tracked by the application by handling callback from Callback#onConnectionStateChanged. The
|
* connection state is not related to the return value of this method.
|
*
|
* @return true if the command is successfully sent; otherwise false.
|
*/
|
public boolean connect(BluetoothDevice device) {
|
boolean result = false;
|
|
final IBluetoothHidDevice service = getService();
|
if (service != null) {
|
try {
|
result = service.connect(device);
|
} catch (RemoteException e) {
|
Log.e(TAG, e.toString());
|
}
|
} else {
|
Log.w(TAG, "Proxy not attached to service");
|
}
|
|
return result;
|
}
|
|
/**
|
* Disconnects from currently connected host. The connection state should be tracked by the
|
* application by handling callback from Callback#onConnectionStateChanged. The connection state
|
* is not related to the return value of this method.
|
*
|
* @return true if the command is successfully sent; otherwise false.
|
*/
|
public boolean disconnect(BluetoothDevice device) {
|
boolean result = false;
|
|
final IBluetoothHidDevice service = getService();
|
if (service != null) {
|
try {
|
result = service.disconnect(device);
|
} catch (RemoteException e) {
|
Log.e(TAG, e.toString());
|
}
|
} else {
|
Log.w(TAG, "Proxy not attached to service");
|
}
|
|
return result;
|
}
|
}
|
