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.support.v7.preference.ListPreference; 21 import android.support.v7.preference.Preference; 22 import android.support.v7.preference.PreferenceScreen; 23 import android.util.Log; 24 25 import com.android.settings.core.PreferenceControllerMixin; 26 import com.android.settingslib.core.AbstractPreferenceController; 27 28 public class NightModePreferenceController extends AbstractPreferenceController implements 29 PreferenceControllerMixin, Preference.OnPreferenceChangeListener { 30 31 private static final String TAG = "NightModePrefContr"; 32 private static final String KEY_NIGHT_MODE = "night_mode"; 33 34 public NightModePreferenceController(Context context) { 35 super(context); 36 } 37 38 @Override 39 public boolean isAvailable() { 40 return false; 41 } 42 43 @Override 44 public String getPreferenceKey() { 45 return KEY_NIGHT_MODE; 46 } 47 48 @Override 49 public void displayPreference(PreferenceScreen screen) { 50 if (!isAvailable()) { 51 setVisible(screen, KEY_NIGHT_MODE, false /* visible */); 52 return; 53 } 54 ListPreference mNightModePreference = (ListPreference) screen.findPreference( 55 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 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
