1 /*
2  * Copyright (C) 2015 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 package com.google.android.car.kitchensink.volume;
17 
18 import android.car.Car;
19 import android.car.Car.CarServiceLifecycleListener;
20 import android.car.media.CarAudioManager;
21 import android.car.media.CarAudioManager.CarVolumeCallback;
22 import android.content.Context;
23 import android.media.AudioManager;
24 import android.os.Bundle;
25 import android.util.Log;
26 import android.util.SparseArray;
27 import android.view.LayoutInflater;
28 import android.view.View;
29 import android.view.ViewGroup;
30 import android.widget.SeekBar;
31 
32 import androidx.annotation.Nullable;
33 import androidx.fragment.app.Fragment;
34 import androidx.viewpager.widget.ViewPager;
35 
36 import com.google.android.car.kitchensink.R;
37 import com.google.android.material.tabs.TabLayout;
38 
39 import java.util.List;
40 
41 import javax.annotation.concurrent.GuardedBy;
42 
43 public final class VolumeTestFragment extends Fragment {
44     private static final String TAG = "CarVolumeTest";
45     private static final boolean DEBUG = true;
46 
47     private AudioManager mAudioManager;
48     private AudioZoneVolumeTabAdapter mAudioZoneAdapter;
49     @GuardedBy("mLock")
50     private final SparseArray<CarAudioZoneVolumeFragment> mZoneVolumeFragments =
51             new SparseArray<>();
52 
53     private CarAudioManager mCarAudioManager;
54     private Car mCar;
55 
56     private SeekBar mFader;
57     private SeekBar mBalance;
58 
59     private TabLayout mZonesTabLayout;
60     private Object mLock = new Object();
61 
62     public static class CarAudioZoneVolumeInfo {
63         public int mGroupId;
64         public String mId;
65         public String mMax;
66         public String mCurrent;
67         public boolean mHasFocus;
68     }
69 
70     private final class CarVolumeChangeListener extends CarVolumeCallback {
71         @Override
onGroupVolumeChanged(int zoneId, int groupId, int flags)72         public void onGroupVolumeChanged(int zoneId, int groupId, int flags) {
73             if (DEBUG) {
74                 Log.d(TAG, "onGroupVolumeChanged volume changed for zone "
75                         + zoneId);
76             }
77             synchronized (mLock) {
78                 CarAudioZoneVolumeFragment fragment = mZoneVolumeFragments.get(zoneId);
79                 if (fragment != null) {
80                     fragment.sendChangeMessage();
81                 }
82             }
83         }
84 
85         @Override
onMasterMuteChanged(int zoneId, int flags)86         public void onMasterMuteChanged(int zoneId, int flags) {
87             if (DEBUG) {
88                 Log.d(TAG, "onMasterMuteChanged master mute "
89                         + mAudioManager.isMasterMute());
90             }
91         }
92     }
93 
94     private final CarVolumeCallback mCarVolumeCallback = new CarVolumeChangeListener();
95 
96     private CarServiceLifecycleListener mCarServiceLifecycleListener = (car, ready) -> {
97         if (!ready) {
98             if (DEBUG) {
99                 Log.d(TAG, "Disconnect from Car Service");
100             }
101             return;
102         }
103         if (DEBUG) {
104             Log.d(TAG, "Connected to Car Service");
105         }
106         mCarAudioManager = (CarAudioManager) car.getCarManager(Car.AUDIO_SERVICE);
107         initVolumeInfo();
108         mCarAudioManager.registerCarVolumeCallback(mCarVolumeCallback);
109     };
110 
111     @Override
onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState)112     public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
113                              @Nullable Bundle savedInstanceState) {
114         mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
115 
116         View v = inflater.inflate(R.layout.volume_test, container, false);
117 
118         mZonesTabLayout = v.findViewById(R.id.zones_tab);
119         ViewPager viewPager = (ViewPager) v.findViewById(R.id.zone_view_pager);
120 
121         mAudioZoneAdapter = new AudioZoneVolumeTabAdapter(getChildFragmentManager());
122         viewPager.setAdapter(mAudioZoneAdapter);
123         mZonesTabLayout.setupWithViewPager(viewPager);
124 
125         SeekBar.OnSeekBarChangeListener seekListener =
126                 new SeekBar.OnSeekBarChangeListener() {
127             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
128                 final float percent = (progress - 100) / 100.0f;
129                 if (seekBar.getId() == R.id.fade_bar) {
130                     mCarAudioManager.setFadeTowardFront(percent);
131                 } else {
132                     mCarAudioManager.setBalanceTowardRight(percent);
133                 }
134             }
135 
136             public void onStartTrackingTouch(SeekBar seekBar) {}
137 
138             public void onStopTrackingTouch(SeekBar seekBar) {}
139         };
140 
141         mFader = v.findViewById(R.id.fade_bar);
142         mFader.setOnSeekBarChangeListener(seekListener);
143 
144         mBalance = v.findViewById(R.id.balance_bar);
145         mBalance.setOnSeekBarChangeListener(seekListener);
146 
147         mCar = Car.createCar(getActivity(), /* handler= */ null,
148                 Car.CAR_WAIT_TIMEOUT_WAIT_FOREVER, mCarServiceLifecycleListener);
149         return v;
150     }
151 
152     @Override
onDestroyView()153     public void onDestroyView() {
154         if (mCar != null && mCar.isConnected()) {
155             mCar.disconnect();
156             mCar = null;
157         }
158         super.onDestroyView();
159     }
160 
initVolumeInfo()161     private void initVolumeInfo() {
162         synchronized (mLock) {
163             List<Integer> audioZoneIds = mCarAudioManager.getAudioZoneIds();
164             for (int index = 0; index < audioZoneIds.size(); index++) {
165                 int zoneId = audioZoneIds.get(index);
166                 CarAudioZoneVolumeFragment fragment =
167                         new CarAudioZoneVolumeFragment(zoneId, mCarAudioManager, mAudioManager);
168                 mZonesTabLayout.addTab(mZonesTabLayout.newTab().setText("Audio Zone " + zoneId));
169                 mAudioZoneAdapter.addFragment(fragment, "Audio Zone " + zoneId);
170                 if (DEBUG) {
171                     Log.d(TAG, "Adding audio volume for zone " + zoneId);
172                 }
173                 mZoneVolumeFragments.put(zoneId, fragment);
174             }
175         }
176     }
177 }
178