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[android-x86/packages-apps-Settings.git] / src / com / android / settings / notification / PulseNotificationPreferenceController.java
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 android.content.ContentResolver;
20 import android.content.Context;
21 import android.database.ContentObserver;
22 import android.net.Uri;
23 import android.os.Handler;
24 import android.provider.Settings;
25 import android.support.v7.preference.Preference;
26 import android.support.v7.preference.PreferenceScreen;
27 import android.support.v7.preference.TwoStatePreference;
28 import android.util.Log;
29
30 import com.android.settings.core.PreferenceControllerMixin;
31 import com.android.settingslib.core.AbstractPreferenceController;
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 import static android.provider.Settings.System.NOTIFICATION_LIGHT_PULSE;
37
38 public class PulseNotificationPreferenceController extends AbstractPreferenceController
39         implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener,
40         LifecycleObserver, OnResume, OnPause {
41
42     private static final String TAG = "PulseNotifPrefContr";
43     private static final String KEY_NOTIFICATION_PULSE = "notification_pulse";
44     private SettingObserver mSettingObserver;
45
46     public PulseNotificationPreferenceController(Context context) {
47         super(context);
48     }
49
50     @Override
51     public void displayPreference(PreferenceScreen screen) {
52         super.displayPreference(screen);
53         Preference preference = screen.findPreference(KEY_NOTIFICATION_PULSE);
54         if (preference != null) {
55             mSettingObserver = new SettingObserver(preference);
56         }
57     }
58
59     @Override
60     public void onResume() {
61         if (mSettingObserver != null) {
62             mSettingObserver.register(mContext.getContentResolver(), true /* register */);
63         }
64     }
65
66     @Override
67     public void onPause() {
68         if (mSettingObserver != null) {
69             mSettingObserver.register(mContext.getContentResolver(), false /* register */);
70         }
71     }
72
73     @Override
74     public String getPreferenceKey() {
75         return KEY_NOTIFICATION_PULSE;
76     }
77
78     @Override
79     public boolean isAvailable() {
80         return mContext.getResources()
81                 .getBoolean(com.android.internal.R.bool.config_intrusiveNotificationLed);
82     }
83
84     @Override
85     public void updateState(Preference preference) {
86         try {
87             final boolean checked = Settings.System.getInt(mContext.getContentResolver(),
88                     NOTIFICATION_LIGHT_PULSE) == 1;
89             ((TwoStatePreference) preference).setChecked(checked);
90         } catch (Settings.SettingNotFoundException snfe) {
91             Log.e(TAG, NOTIFICATION_LIGHT_PULSE + " not found");
92         }
93     }
94
95     @Override
96     public boolean onPreferenceChange(Preference preference, Object newValue) {
97         final boolean val = (Boolean) newValue;
98         return Settings.System.putInt(mContext.getContentResolver(),
99                 NOTIFICATION_LIGHT_PULSE, val ? 1 : 0);
100     }
101
102     class SettingObserver extends ContentObserver {
103
104         private final Uri NOTIFICATION_LIGHT_PULSE_URI =
105                 Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE);
106
107         private final Preference mPreference;
108
109         public SettingObserver(Preference preference) {
110             super(new Handler());
111             mPreference = preference;
112         }
113
114         public void register(ContentResolver cr, boolean register) {
115             if (register) {
116                 cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this);
117             } else {
118                 cr.unregisterContentObserver(this);
119             }
120         }
121
122         @Override
123         public void onChange(boolean selfChange, Uri uri) {
124             super.onChange(selfChange, uri);
125             if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) {
126                 updateState(mPreference);
127             }
128         }
129     }
130 }