1 /*
2  * Copyright (C) 2019 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.BluetoothHeadsetClient;
20 import android.content.BroadcastReceiver;
21 import android.content.Context;
22 import android.content.Intent;
23 import android.content.IntentFilter;
24 
25 import androidx.lifecycle.LiveData;
26 
27 import com.android.car.dialer.log.L;
28 import com.android.car.dialer.telecom.UiCallManager;
29 
30 /**
31  * Provides the current connecting audio route.
32  */
33 public class AudioRouteLiveData extends LiveData<Integer> {
34     private static final String TAG = "CD.AudioRouteLiveData";
35 
36     private final Context mContext;
37     private final IntentFilter mAudioRouteChangeFilter;
38 
39     private final BroadcastReceiver mAudioRouteChangeReceiver = new BroadcastReceiver() {
40         @Override
41         public void onReceive(Context context, Intent intent) {
42             updateAudioRoute();
43         }
44     };
45 
AudioRouteLiveData(Context context)46     public AudioRouteLiveData(Context context) {
47         mContext = context;
48         mAudioRouteChangeFilter =
49                 new IntentFilter(BluetoothHeadsetClient.ACTION_AUDIO_STATE_CHANGED);
50     }
51 
52     @Override
onActive()53     protected void onActive() {
54         updateAudioRoute();
55         mContext.registerReceiver(mAudioRouteChangeReceiver, mAudioRouteChangeFilter);
56     }
57 
58     @Override
onInactive()59     protected void onInactive() {
60         mContext.unregisterReceiver(mAudioRouteChangeReceiver);
61     }
62 
updateAudioRoute()63     private void updateAudioRoute() {
64         int audioRoute = UiCallManager.get().getAudioRoute();
65         if (getValue() == null || audioRoute != getValue()) {
66             L.d(TAG, "updateAudioRoute to %s", audioRoute);
67             setValue(audioRoute);
68         }
69     }
70 }
71