1 /*
2  * Copyright (C) 2020 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.network;
18 
19 import android.content.Context;
20 
21 import androidx.lifecycle.Lifecycle;
22 import androidx.lifecycle.LifecycleObserver;
23 import androidx.lifecycle.OnLifecycleEvent;
24 import androidx.preference.PreferenceScreen;
25 
26 import com.android.settings.overlay.FeatureFactory;
27 import com.android.settings.widget.GenericSwitchController;
28 import com.android.settings.wifi.WifiEnabler;
29 import com.android.settingslib.RestrictedSwitchPreference;
30 import com.android.settingslib.core.AbstractPreferenceController;
31 
32 /**
33  * This controller helps to manage the state of wifi switch preference.
34  */
35 public class WifiSwitchPreferenceController extends AbstractPreferenceController implements
36         LifecycleObserver {
37 
38     public static final String KEY = "main_toggle_wifi";
39 
40     private RestrictedSwitchPreference mPreference;
41 
42     private WifiEnabler mWifiEnabler;
43 
WifiSwitchPreferenceController(Context context, Lifecycle lifecycle)44     public WifiSwitchPreferenceController(Context context, Lifecycle lifecycle) {
45         super(context);
46         if (lifecycle == null) {
47             throw new IllegalArgumentException("Lifecycle must be set");
48         }
49 
50         lifecycle.addObserver(this);
51     }
52 
53     @Override
getPreferenceKey()54     public String getPreferenceKey() {
55         return KEY;
56     }
57 
58     @Override
isAvailable()59     public boolean isAvailable() {
60         return true;
61     }
62 
63     @Override
displayPreference(PreferenceScreen screen)64     public void displayPreference(PreferenceScreen screen) {
65         super.displayPreference(screen);
66         mPreference = screen.findPreference(getPreferenceKey());
67     }
68 
69     /** Lifecycle.Event.ON_START */
70     @OnLifecycleEvent(Lifecycle.Event.ON_START)
onStart()71     public void onStart() {
72         if (mPreference != null) {
73             mWifiEnabler = new WifiEnabler(mContext, new GenericSwitchController(mPreference),
74                     FeatureFactory.getFactory(mContext).getMetricsFeatureProvider());
75         }
76     }
77 
78     /** Lifecycle.Event.ON_STOP */
79     @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
onStop()80     public void onStop() {
81         if (mWifiEnabler != null) {
82             mWifiEnabler.teardownSwitchController();
83         }
84     }
85 
86     /** Lifecycle.Event.ON_RESUME */
87     @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
onResume()88     public void onResume() {
89         if (mWifiEnabler != null) {
90             mWifiEnabler.resume(mContext);
91         }
92     }
93 
94     /** Lifecycle.Event.ON_PAUSE */
95     @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
onPause()96     public void onPause() {
97         if (mWifiEnabler != null) {
98             mWifiEnabler.pause();
99         }
100     }
101 }
102