1 /*
2  * Copyright (C) 2016 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.notification;
18 
19 import static android.provider.Settings.System.NOTIFICATION_LIGHT_PULSE;
20 
21 import android.content.ContentResolver;
22 import android.content.Context;
23 import android.database.ContentObserver;
24 import android.net.Uri;
25 import android.os.Handler;
26 import android.provider.Settings;
27 
28 import androidx.preference.Preference;
29 import androidx.preference.PreferenceScreen;
30 
31 import com.android.settings.core.TogglePreferenceController;
32 import com.android.settingslib.core.lifecycle.LifecycleObserver;
33 import com.android.settingslib.core.lifecycle.events.OnPause;
34 import com.android.settingslib.core.lifecycle.events.OnResume;
35 
36 public class PulseNotificationPreferenceController extends TogglePreferenceController
37         implements LifecycleObserver, OnResume, OnPause {
38 
39     private static final int ON = 1;
40     private static final int OFF = 0;
41     private SettingObserver mSettingObserver;
42 
PulseNotificationPreferenceController(Context context, String key)43     public PulseNotificationPreferenceController(Context context, String key) {
44         super(context, key);
45     }
46 
47     @Override
displayPreference(PreferenceScreen screen)48     public void displayPreference(PreferenceScreen screen) {
49         super.displayPreference(screen);
50         Preference preference = screen.findPreference(getPreferenceKey());
51         if (preference != null) {
52             mSettingObserver = new SettingObserver(preference);
53         }
54     }
55 
56     @Override
onResume()57     public void onResume() {
58         if (mSettingObserver != null) {
59             mSettingObserver.register(mContext.getContentResolver(), true /* register */);
60         }
61     }
62 
63     @Override
onPause()64     public void onPause() {
65         if (mSettingObserver != null) {
66             mSettingObserver.register(mContext.getContentResolver(), false /* register */);
67         }
68     }
69 
70     @Override
getAvailabilityStatus()71     public int getAvailabilityStatus() {
72         return mContext.getResources().getBoolean(
73                 com.android.internal.R.bool.config_intrusiveNotificationLed) ? AVAILABLE
74                 : UNSUPPORTED_ON_DEVICE;
75     }
76 
77     @Override
isChecked()78     public boolean isChecked() {
79         return Settings.System.getInt(mContext.getContentResolver(), NOTIFICATION_LIGHT_PULSE, OFF)
80                 == ON;
81     }
82 
83     @Override
setChecked(boolean isChecked)84     public boolean setChecked(boolean isChecked) {
85         return Settings.System.putInt(mContext.getContentResolver(), NOTIFICATION_LIGHT_PULSE,
86                 isChecked ? ON : OFF);
87     }
88 
89     class SettingObserver extends ContentObserver {
90 
91         private final Uri NOTIFICATION_LIGHT_PULSE_URI =
92                 Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE);
93 
94         private final Preference mPreference;
95 
SettingObserver(Preference preference)96         public SettingObserver(Preference preference) {
97             super(new Handler());
98             mPreference = preference;
99         }
100 
register(ContentResolver cr, boolean register)101         public void register(ContentResolver cr, boolean register) {
102             if (register) {
103                 cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this);
104             } else {
105                 cr.unregisterContentObserver(this);
106             }
107         }
108 
109         @Override
onChange(boolean selfChange, Uri uri)110         public void onChange(boolean selfChange, Uri uri) {
111             super.onChange(selfChange, uri);
112             if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) {
113                 updateState(mPreference);
114             }
115         }
116     }
117 }
118