1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file 5 * except in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the 10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 11 * KIND, either express or implied. See the License for the specific language governing 12 * permissions and limitations under the License. 13 */ 14 package com.android.settings.display; 15 16 import static android.content.Context.UI_MODE_SERVICE; 17 18 import android.app.UiModeManager; 19 import android.content.Context; 20 import android.util.Log; 21 22 import androidx.preference.ListPreference; 23 import androidx.preference.Preference; 24 import androidx.preference.PreferenceScreen; 25 26 import com.android.settings.core.PreferenceControllerMixin; 27 import com.android.settingslib.core.AbstractPreferenceController; 28 29 public class NightModePreferenceController extends AbstractPreferenceController implements 30 PreferenceControllerMixin, Preference.OnPreferenceChangeListener { 31 32 private static final String TAG = "NightModePrefContr"; 33 private static final String KEY_NIGHT_MODE = "night_mode"; 34 NightModePreferenceController(Context context)35 public NightModePreferenceController(Context context) { 36 super(context); 37 } 38 39 @Override isAvailable()40 public boolean isAvailable() { 41 return false; 42 } 43 44 @Override getPreferenceKey()45 public String getPreferenceKey() { 46 return KEY_NIGHT_MODE; 47 } 48 49 @Override displayPreference(PreferenceScreen screen)50 public void displayPreference(PreferenceScreen screen) { 51 if (!isAvailable()) { 52 setVisible(screen, KEY_NIGHT_MODE, false /* visible */); 53 return; 54 } 55 final ListPreference mNightModePreference = screen.findPreference(KEY_NIGHT_MODE); 56 if (mNightModePreference != null) { 57 final UiModeManager uiManager = 58 (UiModeManager) mContext.getSystemService(UI_MODE_SERVICE); 59 final int currentNightMode = uiManager.getNightMode(); 60 mNightModePreference.setValue(String.valueOf(currentNightMode)); 61 mNightModePreference.setOnPreferenceChangeListener(this); 62 } 63 } 64 65 @Override onPreferenceChange(Preference preference, Object newValue)66 public boolean onPreferenceChange(Preference preference, Object newValue) { 67 try { 68 final int value = Integer.parseInt((String) newValue); 69 final UiModeManager uiManager = 70 (UiModeManager) mContext.getSystemService(UI_MODE_SERVICE); 71 uiManager.setNightMode(value); 72 } catch (NumberFormatException e) { 73 Log.e(TAG, "could not persist night mode setting", e); 74 return false; 75 } 76 return true; 77 } 78 } 79