1 /*
2  * Copyright (C) 2017 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.settings.development;
18 
19 import android.content.Context;
20 import android.os.SystemProperties;
21 
22 import androidx.annotation.VisibleForTesting;
23 import androidx.preference.Preference;
24 import androidx.preference.SwitchPreference;
25 
26 import com.android.settings.core.PreferenceControllerMixin;
27 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
28 
29 public class BluetoothAbsoluteVolumePreferenceController extends
30         DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
31         PreferenceControllerMixin {
32 
33     private static final String BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_KEY =
34             "bluetooth_disable_absolute_volume";
35     @VisibleForTesting
36     static final String BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_PROPERTY =
37             "persist.bluetooth.disableabsvol";
38 
BluetoothAbsoluteVolumePreferenceController(Context context)39     public BluetoothAbsoluteVolumePreferenceController(Context context) {
40         super(context);
41     }
42 
43     @Override
getPreferenceKey()44     public String getPreferenceKey() {
45         return BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_KEY;
46     }
47 
48     @Override
onPreferenceChange(Preference preference, Object newValue)49     public boolean onPreferenceChange(Preference preference, Object newValue) {
50         final boolean isEnabled = (Boolean) newValue;
51         SystemProperties.set(BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_PROPERTY,
52                 isEnabled ? "true" : "false");
53         return true;
54     }
55 
56     @Override
updateState(Preference preference)57     public void updateState(Preference preference) {
58         final boolean isEnabled = SystemProperties.getBoolean(
59                 BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_PROPERTY, false /* default */);
60         ((SwitchPreference) mPreference).setChecked(isEnabled);
61     }
62 
63     @Override
onDeveloperOptionsSwitchDisabled()64     protected void onDeveloperOptionsSwitchDisabled() {
65         super.onDeveloperOptionsSwitchDisabled();
66         SystemProperties.set(BLUETOOTH_DISABLE_ABSOLUTE_VOLUME_PROPERTY, "false");
67         ((SwitchPreference) mPreference).setChecked(false);
68     }
69 }
70