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