1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.wifi;
import android.content.ContentResolver;
import android.content.Context;
import android.provider.Settings;
import java.io.FileDescriptor;
import java.io.PrintWriter;
/* Tracks persisted settings for Wi-Fi and airplane mode interaction */
final class WifiSettingsStore {
/* Values tracked in Settings.Global.WIFI_ON */
private static final int WIFI_DISABLED = 0;
private static final int WIFI_ENABLED = 1;
/* Wifi enabled while in airplane mode */
private static final int WIFI_ENABLED_AIRPLANE_OVERRIDE = 2;
/* Wifi disabled due to airplane mode on */
private static final int WIFI_DISABLED_AIRPLANE_ON = 3;
/* Persisted state that tracks the wifi & airplane interaction from settings */
private int mPersistWifiState = WIFI_DISABLED;
/* Tracks current airplane mode state */
private boolean mAirplaneModeOn = false;
/* Tracks the setting of scan being available even when wi-fi is turned off
*/
private boolean mScanAlwaysAvailable;
private final Context mContext;
/* Tracks if we have checked the saved wi-fi state after boot */
private boolean mCheckSavedStateAtBoot = false;
WifiSettingsStore(Context context) {
mContext = context;
mAirplaneModeOn = getPersistedAirplaneModeOn();
mPersistWifiState = getPersistedWifiState();
mScanAlwaysAvailable = getPersistedScanAlwaysAvailable();
}
synchronized boolean isWifiToggleEnabled() {
if (!mCheckSavedStateAtBoot) {
mCheckSavedStateAtBoot = true;
if (testAndClearWifiSavedState()) return true;
}
if (mAirplaneModeOn) {
return mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE;
} else {
return mPersistWifiState != WIFI_DISABLED;
}
}
/**
* Returns true if airplane mode is currently on.
* @return {@code true} if airplane mode is on.
*/
synchronized boolean isAirplaneModeOn() {
return mAirplaneModeOn;
}
synchronized boolean isScanAlwaysAvailable() {
return mScanAlwaysAvailable;
}
synchronized boolean handleWifiToggled(boolean wifiEnabled) {
// Can Wi-Fi be toggled in airplane mode ?
if (mAirplaneModeOn && !isAirplaneToggleable()) {
return false;
}
if (wifiEnabled) {
if (mAirplaneModeOn) {
persistWifiState(WIFI_ENABLED_AIRPLANE_OVERRIDE);
} else {
persistWifiState(WIFI_ENABLED);
}
} else {
// When wifi state is disabled, we do not care
// if airplane mode is on or not. The scenario of
// wifi being disabled due to airplane mode being turned on
// is handled handleAirplaneModeToggled()
persistWifiState(WIFI_DISABLED);
}
return true;
}
synchronized boolean handleAirplaneModeToggled() {
// Is Wi-Fi sensitive to airplane mode changes ?
if (!isAirplaneSensitive()) {
return false;
}
mAirplaneModeOn = getPersistedAirplaneModeOn();
if (mAirplaneModeOn) {
// Wifi disabled due to airplane on
if (mPersistWifiState == WIFI_ENABLED) {
persistWifiState(WIFI_DISABLED_AIRPLANE_ON);
}
} else {
/* On airplane mode disable, restore wifi state if necessary */
if (testAndClearWifiSavedState() ||
mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE) {
persistWifiState(WIFI_ENABLED);
}
}
return true;
}
synchronized void handleWifiScanAlwaysAvailableToggled() {
mScanAlwaysAvailable = getPersistedScanAlwaysAvailable();
}
void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
pw.println("mPersistWifiState " + mPersistWifiState);
pw.println("mAirplaneModeOn " + mAirplaneModeOn);
}
private void persistWifiState(int state) {
final ContentResolver cr = mContext.getContentResolver();
mPersistWifiState = state;
Settings.Global.putInt(cr, Settings.Global.WIFI_ON, state);
}
/* Does Wi-Fi need to be disabled when airplane mode is on ? */
private boolean isAirplaneSensitive() {
String airplaneModeRadios = Settings.Global.getString(mContext.getContentResolver(),
Settings.Global.AIRPLANE_MODE_RADIOS);
return airplaneModeRadios == null
|| airplaneModeRadios.contains(Settings.Global.RADIO_WIFI);
}
/* Is Wi-Fi allowed to be re-enabled while airplane mode is on ? */
private boolean isAirplaneToggleable() {
String toggleableRadios = Settings.Global.getString(mContext.getContentResolver(),
Settings.Global.AIRPLANE_MODE_TOGGLEABLE_RADIOS);
return toggleableRadios != null
&& toggleableRadios.contains(Settings.Global.RADIO_WIFI);
}
/* After a reboot, we restore wi-fi to be on if it was turned off temporarily for tethering.
* The settings app tracks the saved state, but the framework has to check it at boot to
* make sure the wi-fi is turned on in case it was turned off for the purpose of tethering.
*
* Note that this is not part of the regular WIFI_ON setting because this only needs to
* be controlled through the settings app and not the Wi-Fi public API.
*/
private boolean testAndClearWifiSavedState() {
final ContentResolver cr = mContext.getContentResolver();
int wifiSavedState = 0;
try {
wifiSavedState = Settings.Global.getInt(cr, Settings.Global.WIFI_SAVED_STATE);
if(wifiSavedState == 1)
Settings.Global.putInt(cr, Settings.Global.WIFI_SAVED_STATE, 0);
} catch (Settings.SettingNotFoundException e) {
;
}
return (wifiSavedState == 1);
}
private int getPersistedWifiState() {
final ContentResolver cr = mContext.getContentResolver();
try {
return Settings.Global.getInt(cr, Settings.Global.WIFI_ON);
} catch (Settings.SettingNotFoundException e) {
Settings.Global.putInt(cr, Settings.Global.WIFI_ON, WIFI_DISABLED);
return WIFI_DISABLED;
}
}
private boolean getPersistedAirplaneModeOn() {
return Settings.Global.getInt(mContext.getContentResolver(),
Settings.Global.AIRPLANE_MODE_ON, 0) == 1;
}
private boolean getPersistedScanAlwaysAvailable() {
return Settings.Global.getInt(mContext.getContentResolver(),
Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE,
0) == 1;
}
}
|
