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 */
14package com.android.settings.display;
15
16import android.app.UiModeManager;
17import android.content.Context;
18import android.support.v7.preference.ListPreference;
19import android.support.v7.preference.Preference;
20import android.support.v7.preference.PreferenceScreen;
21import android.util.Log;
22
23import com.android.settings.core.PreferenceControllerMixin;
24import com.android.settingslib.core.AbstractPreferenceController;
25
26import static android.content.Context.UI_MODE_SERVICE;
27
28public 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            removePreference(screen, KEY_NIGHT_MODE);
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