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.development;
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.os.Looper;
25 import android.provider.Settings;
26 import android.util.Log;
27 import android.widget.Toast;
28 
29 import com.android.settings.R;
30 import com.android.settings.widget.SwitchWidgetController;
31 import com.android.settingslib.core.lifecycle.Lifecycle;
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  * Class to control the switch bar in the wireless debugging fragment.
38  */
39 public class WirelessDebuggingEnabler implements SwitchWidgetController.OnSwitchChangeListener,
40         LifecycleObserver, OnResume, OnPause {
41     private static final String TAG = "WirelessDebuggingEnabler";
42 
43     private final SwitchWidgetController mSwitchWidget;
44     private Context mContext;
45     private boolean mListeningToOnSwitchChange = false;
46     private OnEnabledListener mListener;
47     private final ContentResolver mContentResolver;
48     private final ContentObserver mSettingsObserver;
49     private final Handler mHandler = new Handler(Looper.getMainLooper());
50 
WirelessDebuggingEnabler(Context context, SwitchWidgetController switchWidget, OnEnabledListener listener, Lifecycle lifecycle)51     public WirelessDebuggingEnabler(Context context, SwitchWidgetController switchWidget,
52             OnEnabledListener listener, Lifecycle lifecycle) {
53         mContext = context;
54         mSwitchWidget = switchWidget;
55         mSwitchWidget.setListener(this);
56         mSwitchWidget.setupView();
57 
58         mListener = listener;
59         if (lifecycle != null) {
60             lifecycle.addObserver(this);
61         }
62 
63         mContentResolver = context.getContentResolver();
64         mSettingsObserver = new ContentObserver(mHandler) {
65             @Override
66             public void onChange(boolean selfChange, Uri uri) {
67                 Log.i(TAG, "ADB_WIFI_ENABLED=" + isAdbWifiEnabled());
68                 onWirelessDebuggingEnabled(isAdbWifiEnabled());
69             }
70         };
71     }
72 
isAdbWifiEnabled()73     private boolean isAdbWifiEnabled() {
74         return Settings.Global.getInt(mContentResolver, Settings.Global.ADB_WIFI_ENABLED,
75                 AdbPreferenceController.ADB_SETTING_OFF)
76                 != AdbPreferenceController.ADB_SETTING_OFF;
77     }
78 
79     /**
80      * Tears down the switch controller for the wireless debugging switch.
81      */
teardownSwitchController()82     public void teardownSwitchController() {
83         if (mListeningToOnSwitchChange) {
84             mSwitchWidget.stopListening();
85             mListeningToOnSwitchChange = false;
86         }
87         mSwitchWidget.teardownView();
88     }
89 
90     @Override
onResume()91     public void onResume() {
92         if (!mListeningToOnSwitchChange) {
93             mSwitchWidget.startListening();
94             mListeningToOnSwitchChange = true;
95         }
96         onWirelessDebuggingEnabled(isAdbWifiEnabled());
97         mContentResolver.registerContentObserver(
98                 Settings.Global.getUriFor(Settings.Global.ADB_WIFI_ENABLED), false,
99                 mSettingsObserver);
100     }
101 
102     @Override
onPause()103     public void onPause() {
104         if (mListeningToOnSwitchChange) {
105             mSwitchWidget.stopListening();
106             mListeningToOnSwitchChange = false;
107         }
108         mContentResolver.unregisterContentObserver(mSettingsObserver);
109     }
110 
onWirelessDebuggingEnabled(boolean enabled)111     private void onWirelessDebuggingEnabled(boolean enabled) {
112         mSwitchWidget.setChecked(enabled);
113         if (mListener != null) {
114             mListener.onEnabled(enabled);
115         }
116     }
117 
writeAdbWifiSetting(boolean enabled)118     protected void writeAdbWifiSetting(boolean enabled) {
119         Settings.Global.putInt(mContext.getContentResolver(),
120                 Settings.Global.ADB_WIFI_ENABLED, enabled ? AdbPreferenceController.ADB_SETTING_ON
121                 : AdbPreferenceController.ADB_SETTING_OFF);
122     }
123 
124     @Override
onSwitchToggled(boolean isChecked)125     public boolean onSwitchToggled(boolean isChecked) {
126         if (isChecked && !WirelessDebuggingPreferenceController.isWifiConnected(mContext)) {
127             // No connected Wi-Fi network. Reset the switch to off.
128             Toast.makeText(
129                     mContext, R.string.adb_wireless_no_network_msg, Toast.LENGTH_LONG)
130                     .show();
131             mSwitchWidget.setChecked(false);
132             return false;
133         }
134 
135         writeAdbWifiSetting(isChecked);
136         return true;
137     }
138 
139     /**
140      * Interface for subscribers to implement in order to listen for
141      * wireless debugging state changes.
142      */
143     public interface OnEnabledListener {
144         /**
145          * Called when wireless debugging state changes.
146          *
147          * @param enabled the state of wireless debugging
148          */
onEnabled(boolean enabled)149         void onEnabled(boolean enabled);
150     }
151 }
152