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.settings.development; 18 19 import android.content.Context; 20 import android.os.SystemProperties; 21 22 import androidx.annotation.VisibleForTesting; 23 import androidx.preference.ListPreference; 24 import androidx.preference.Preference; 25 import androidx.preference.PreferenceScreen; 26 27 import com.android.settings.core.PreferenceControllerMixin; 28 import com.android.settingslib.development.DeveloperOptionsPreferenceController; 29 30 public class BluetoothMaxConnectedAudioDevicesPreferenceController extends 31 DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener, 32 PreferenceControllerMixin { 33 34 private static final String MAX_CONNECTED_AUDIO_DEVICES_PREFERENCE_KEY = 35 "bluetooth_max_connected_audio_devices"; 36 37 @VisibleForTesting 38 static final String MAX_CONNECTED_AUDIO_DEVICES_PROPERTY = 39 "persist.bluetooth.maxconnectedaudiodevices"; 40 41 private final int mDefaultMaxConnectedAudioDevices; 42 BluetoothMaxConnectedAudioDevicesPreferenceController(Context context)43 public BluetoothMaxConnectedAudioDevicesPreferenceController(Context context) { 44 super(context); 45 mDefaultMaxConnectedAudioDevices = mContext.getResources().getInteger( 46 com.android.internal.R.integer.config_bluetooth_max_connected_audio_devices); 47 } 48 49 @Override getPreferenceKey()50 public String getPreferenceKey() { 51 return MAX_CONNECTED_AUDIO_DEVICES_PREFERENCE_KEY; 52 } 53 54 @Override displayPreference(PreferenceScreen screen)55 public void displayPreference(PreferenceScreen screen) { 56 super.displayPreference(screen); 57 final ListPreference listPreference = (ListPreference) mPreference; 58 final CharSequence[] entries = listPreference.getEntries(); 59 entries[0] = String.format(entries[0].toString(), mDefaultMaxConnectedAudioDevices); 60 listPreference.setEntries(entries); 61 } 62 63 @Override onPreferenceChange(Preference preference, Object newValue)64 public boolean onPreferenceChange(Preference preference, Object newValue) { 65 String newValueString = newValue.toString(); 66 final ListPreference listPreference = (ListPreference) preference; 67 if (listPreference.findIndexOfValue(newValueString) <= 0) { 68 // Reset property value when default is chosen or when value is illegal 69 newValueString = ""; 70 } 71 SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, newValueString); 72 updateState(preference); 73 return true; 74 } 75 76 @Override updateState(Preference preference)77 public void updateState(Preference preference) { 78 final ListPreference listPreference = (ListPreference) preference; 79 final CharSequence[] entries = listPreference.getEntries(); 80 final String currentValue = SystemProperties.get(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY); 81 int index = 0; 82 if (!currentValue.isEmpty()) { 83 index = listPreference.findIndexOfValue(currentValue); 84 if (index < 0) { 85 // Reset property value when value is illegal 86 SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, ""); 87 index = 0; 88 } 89 } 90 listPreference.setValueIndex(index); 91 listPreference.setSummary(entries[index]); 92 } 93 94 @Override onDeveloperOptionsSwitchEnabled()95 protected void onDeveloperOptionsSwitchEnabled() { 96 super.onDeveloperOptionsSwitchEnabled(); 97 updateState(mPreference); 98 } 99 100 @Override onDeveloperOptionsSwitchDisabled()101 protected void onDeveloperOptionsSwitchDisabled() { 102 super.onDeveloperOptionsSwitchDisabled(); 103 SystemProperties.set(MAX_CONNECTED_AUDIO_DEVICES_PROPERTY, ""); 104 updateState(mPreference); 105 } 106 } 107 108