1 /* 2 * Copyright (C) 2018 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 com.android.car.dialer.livedata; 18 19 import android.bluetooth.BluetoothAdapter; 20 import android.bluetooth.BluetoothHeadsetClient; 21 import android.bluetooth.BluetoothProfile; 22 import android.content.BroadcastReceiver; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.IntentFilter; 26 27 import com.android.car.dialer.log.L; 28 29 import androidx.lifecycle.LiveData; 30 31 /** 32 * Provides the connectivity state of HFP Bluetooth profile. States can be one of: 33 * <ul> 34 * <li>{@link BluetoothProfile#STATE_DISCONNECTED}, 35 * <li>{@link BluetoothProfile#STATE_CONNECTING}, 36 * <li>{@link BluetoothProfile#STATE_CONNECTED}, 37 * <li>{@link BluetoothProfile#STATE_DISCONNECTING} 38 * </ul> 39 */ 40 public class BluetoothHfpStateLiveData extends LiveData<Integer> { 41 private static final String TAG = "CD.BluetoothHfpStateLiveData"; 42 43 private final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 44 private final Context mContext; 45 private final IntentFilter mIntentFilter = new IntentFilter(); 46 47 private BroadcastReceiver mBluetoothStateReceiver = new BroadcastReceiver() { 48 @Override 49 public void onReceive(Context context, Intent intent) { 50 updateState(); 51 } 52 }; 53 54 /** Creates a new {@link BluetoothHfpStateLiveData}. Call on main thread. */ BluetoothHfpStateLiveData(Context context)55 public BluetoothHfpStateLiveData(Context context) { 56 mContext = context; 57 mIntentFilter.addAction(BluetoothHeadsetClient.ACTION_CONNECTION_STATE_CHANGED); 58 } 59 60 @Override onActive()61 protected void onActive() { 62 if (mBluetoothAdapter != null) { 63 updateState(); 64 mContext.registerReceiver(mBluetoothStateReceiver, mIntentFilter); 65 } 66 } 67 68 @Override onInactive()69 protected void onInactive() { 70 if (mBluetoothAdapter != null) { 71 mContext.unregisterReceiver(mBluetoothStateReceiver); 72 } 73 } 74 updateState()75 private void updateState() { 76 int state = mBluetoothAdapter.getProfileConnectionState( 77 BluetoothProfile.HEADSET_CLIENT); 78 if (getValue() == null || state != getValue()) { 79 L.d(TAG, "updateState to %s", state); 80 setValue(state); 81 } 82 } 83 } 84