1 /*
2  * Copyright (C) 2017 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.wifi;
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 
26 import androidx.preference.Preference;
27 import androidx.preference.PreferenceScreen;
28 
29 import com.android.settings.R;
30 import com.android.settings.core.PreferenceControllerMixin;
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 /**
37  * {@link TogglePreferenceController} that controls whether we should notify user when open
38  * network is available.
39  */
40 public class NotifyOpenNetworksPreferenceController extends TogglePreferenceController
41         implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause {
42 
43     private static final String KEY_NOTIFY_OPEN_NETWORKS = "notify_open_networks";
44     private SettingObserver mSettingObserver;
45 
NotifyOpenNetworksPreferenceController(Context context)46     public NotifyOpenNetworksPreferenceController(Context context) {
47         super(context, KEY_NOTIFY_OPEN_NETWORKS);
48     }
49 
50     @Override
displayPreference(PreferenceScreen screen)51     public void displayPreference(PreferenceScreen screen) {
52         super.displayPreference(screen);
53         mSettingObserver = new SettingObserver(screen.findPreference(getPreferenceKey()));
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 AVAILABLE;
73     }
74 
75     @Override
isChecked()76     public boolean isChecked() {
77         return Settings.Global.getInt(mContext.getContentResolver(),
78                 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON, 0) == 1;
79     }
80 
81     @Override
setChecked(boolean isChecked)82     public boolean setChecked(boolean isChecked) {
83         Settings.Global.putInt(mContext.getContentResolver(),
84                 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON,
85                 isChecked ? 1 : 0);
86         return true;
87     }
88 
89     @Override
getSliceHighlightMenuRes()90     public int getSliceHighlightMenuRes() {
91         return R.string.menu_key_network;
92     }
93 
94     class SettingObserver extends ContentObserver {
95         private final Uri NETWORKS_AVAILABLE_URI = Settings.Global.getUriFor(
96                 Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON);
97 
98         private final Preference mPreference;
99 
SettingObserver(Preference preference)100         public SettingObserver(Preference preference) {
101             super(new Handler());
102             mPreference = preference;
103         }
104 
register(ContentResolver cr, boolean register)105         public void register(ContentResolver cr, boolean register) {
106             if (register) {
107                 cr.registerContentObserver(NETWORKS_AVAILABLE_URI, false, this);
108             } else {
109                 cr.unregisterContentObserver(this);
110             }
111         }
112 
113         @Override
onChange(boolean selfChange, Uri uri)114         public void onChange(boolean selfChange, Uri uri) {
115             super.onChange(selfChange, uri);
116             if (NETWORKS_AVAILABLE_URI.equals(uri)) {
117                 updateState(mPreference);
118             }
119         }
120     }
121 }
122