1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.car.builtin.bluetooth; 18 19 import android.annotation.NonNull; 20 import android.annotation.SystemApi; 21 import android.bluetooth.BluetoothDevice; 22 import android.bluetooth.BluetoothHeadsetClient; 23 import android.car.builtin.annotation.AddedIn; 24 import android.car.builtin.annotation.PlatformVersion; 25 import android.os.Bundle; 26 27 import java.util.ArrayList; 28 import java.util.List; 29 30 /** 31 * Provides access to {@code android.bluetooth.BluetoothHeadsetClient} calls. 32 * @hide 33 * @deprecated Moving towards a framework solution that better integrates voice recognition. 34 */ 35 @Deprecated 36 @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES) 37 public final class BluetoothHeadsetClientHelper { 38 BluetoothHeadsetClientHelper()39 private BluetoothHeadsetClientHelper() { 40 throw new UnsupportedOperationException("contains only static members"); 41 } 42 43 /** 44 * Gets connected devices that support BVRA (voice recognition). 45 * 46 * @param headsetClient Proxy object for controlling the Bluetooth HFP Client service. 47 * @return a list of connected devices that support BVRA. 48 */ 49 @AddedIn(PlatformVersion.TIRAMISU_0) getConnectedBvraDevices( @onNull BluetoothHeadsetClient headsetClient)50 public static List<BluetoothDevice> getConnectedBvraDevices( 51 @NonNull BluetoothHeadsetClient headsetClient) { 52 List<BluetoothDevice> devices = headsetClient.getConnectedDevices(); 53 List<BluetoothDevice> bvraDevices = new ArrayList<BluetoothDevice>(); 54 for (int i = 0; i < devices.size(); i++) { 55 BluetoothDevice device = devices.get(i); 56 Bundle bundle = headsetClient.getCurrentAgFeatures(device); 57 if (bundle != null && bundle.getBoolean( 58 BluetoothHeadsetClient.EXTRA_AG_FEATURE_VOICE_RECOGNITION)) { 59 bvraDevices.add(device); 60 } 61 } 62 return bvraDevices; 63 } 64 65 /** 66 * Starts BVRA. 67 * 68 * @param headsetClient Proxy object for controlling the Bluetooth HFP Client service. 69 * @param device The connected device whose voice recognition will be started. 70 * @return {@code true} if the command has been issued successfully; {@code false} otherwise. 71 */ 72 @AddedIn(PlatformVersion.TIRAMISU_0) startVoiceRecognition(@onNull BluetoothHeadsetClient headsetClient, BluetoothDevice device)73 public static boolean startVoiceRecognition(@NonNull BluetoothHeadsetClient headsetClient, 74 BluetoothDevice device) { 75 return headsetClient.startVoiceRecognition(device); 76 } 77 78 /** 79 * Stops BVRA. 80 * 81 * @param headsetClient Proxy object for controlling the Bluetooth HFP Client service. 82 * @param device The connected device whose voice recognition will be stopped. 83 * @return {@code true} if the command has been issued successfully; {@code false} otherwise. 84 */ 85 @AddedIn(PlatformVersion.TIRAMISU_0) stopVoiceRecognition(@onNull BluetoothHeadsetClient headsetClient, BluetoothDevice device)86 public static boolean stopVoiceRecognition(@NonNull BluetoothHeadsetClient headsetClient, 87 BluetoothDevice device) { 88 return headsetClient.stopVoiceRecognition(device); 89 } 90 } 91