1 /* 2 * Copyright (C) 2013 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.server.wifi; 18 19 import android.content.ContentResolver; 20 import android.content.Context; 21 import android.provider.Settings; 22 23 import java.io.FileDescriptor; 24 import java.io.PrintWriter; 25 26 /* Tracks persisted settings for Wi-Fi and airplane mode interaction */ 27 public class WifiSettingsStore { 28 /* Values tracked in Settings.Global.WIFI_ON */ 29 static final int WIFI_DISABLED = 0; 30 static final int WIFI_ENABLED = 1; 31 32 /* Wifi enabled while in airplane mode */ 33 private static final int WIFI_ENABLED_AIRPLANE_OVERRIDE = 2; 34 /* Wifi disabled due to airplane mode on */ 35 private static final int WIFI_DISABLED_AIRPLANE_ON = 3; 36 37 /* Persisted state that tracks the wifi & airplane interaction from settings */ 38 private int mPersistWifiState = WIFI_DISABLED; 39 /* Tracks current airplane mode state */ 40 private boolean mAirplaneModeOn = false; 41 42 private final Context mContext; 43 private final WifiSettingsConfigStore mSettingsConfigStore; 44 WifiSettingsStore(Context context, WifiSettingsConfigStore sharedPreferences)45 WifiSettingsStore(Context context, WifiSettingsConfigStore sharedPreferences) { 46 mContext = context; 47 mSettingsConfigStore = sharedPreferences; 48 mAirplaneModeOn = getPersistedAirplaneModeOn(); 49 mPersistWifiState = getPersistedWifiState(); 50 } 51 isWifiToggleEnabled()52 public synchronized boolean isWifiToggleEnabled() { 53 if (mAirplaneModeOn) { 54 return mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE; 55 } else { 56 return mPersistWifiState != WIFI_DISABLED; 57 } 58 } 59 60 /** 61 * Returns true if airplane mode is currently on. 62 * @return {@code true} if airplane mode is on. 63 */ isAirplaneModeOn()64 public synchronized boolean isAirplaneModeOn() { 65 return mAirplaneModeOn; 66 } 67 isScanAlwaysAvailableToggleEnabled()68 public synchronized boolean isScanAlwaysAvailableToggleEnabled() { 69 return getPersistedScanAlwaysAvailable(); 70 } 71 isScanAlwaysAvailable()72 public synchronized boolean isScanAlwaysAvailable() { 73 return !mAirplaneModeOn && getPersistedScanAlwaysAvailable(); 74 } 75 isWifiScoringEnabled()76 public synchronized boolean isWifiScoringEnabled() { 77 return getPersistedWifiScoringEnabled(); 78 } 79 handleWifiToggled(boolean wifiEnabled)80 public synchronized boolean handleWifiToggled(boolean wifiEnabled) { 81 // Can Wi-Fi be toggled in airplane mode ? 82 if (mAirplaneModeOn && !isAirplaneToggleable()) { 83 return false; 84 } 85 86 if (wifiEnabled) { 87 if (mAirplaneModeOn) { 88 persistWifiState(WIFI_ENABLED_AIRPLANE_OVERRIDE); 89 } else { 90 persistWifiState(WIFI_ENABLED); 91 } 92 } else { 93 // When wifi state is disabled, we do not care 94 // if airplane mode is on or not. The scenario of 95 // wifi being disabled due to airplane mode being turned on 96 // is handled handleAirplaneModeToggled() 97 persistWifiState(WIFI_DISABLED); 98 } 99 return true; 100 } 101 handleAirplaneModeToggled()102 synchronized boolean handleAirplaneModeToggled() { 103 // Is Wi-Fi sensitive to airplane mode changes ? 104 if (!isAirplaneSensitive()) { 105 return false; 106 } 107 108 mAirplaneModeOn = getPersistedAirplaneModeOn(); 109 if (mAirplaneModeOn) { 110 // Wifi disabled due to airplane on 111 if (mPersistWifiState == WIFI_ENABLED) { 112 persistWifiState(WIFI_DISABLED_AIRPLANE_ON); 113 } 114 } else { 115 /* On airplane mode disable, restore wifi state if necessary */ 116 if (mPersistWifiState == WIFI_ENABLED_AIRPLANE_OVERRIDE 117 || mPersistWifiState == WIFI_DISABLED_AIRPLANE_ON) { 118 persistWifiState(WIFI_ENABLED); 119 } 120 } 121 return true; 122 } 123 handleWifiScanAlwaysAvailableToggled(boolean isAvailable)124 synchronized void handleWifiScanAlwaysAvailableToggled(boolean isAvailable) { 125 persistScanAlwaysAvailableState(isAvailable); 126 } 127 handleWifiScoringEnabled(boolean enabled)128 synchronized boolean handleWifiScoringEnabled(boolean enabled) { 129 persistWifiScoringEnabledState(enabled); 130 return true; 131 } 132 dump(FileDescriptor fd, PrintWriter pw, String[] args)133 void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 134 pw.println("WifiState " + getPersistedWifiState()); 135 pw.println("AirplaneModeOn " + getPersistedAirplaneModeOn()); 136 pw.println("ScanAlwaysAvailable " + getPersistedScanAlwaysAvailable()); 137 pw.println("WifiScoringState " + getPersistedWifiScoringEnabled()); 138 } 139 persistWifiState(int state)140 private void persistWifiState(int state) { 141 final ContentResolver cr = mContext.getContentResolver(); 142 mPersistWifiState = state; 143 Settings.Global.putInt(cr, Settings.Global.WIFI_ON, state); 144 } 145 persistScanAlwaysAvailableState(boolean isAvailable)146 private void persistScanAlwaysAvailableState(boolean isAvailable) { 147 mSettingsConfigStore.put( 148 WifiSettingsConfigStore.WIFI_SCAN_ALWAYS_AVAILABLE, isAvailable); 149 } 150 persistWifiScoringEnabledState(boolean enabled)151 private void persistWifiScoringEnabledState(boolean enabled) { 152 mSettingsConfigStore.put( 153 WifiSettingsConfigStore.WIFI_SCORING_ENABLED, enabled); 154 } 155 156 /* Does Wi-Fi need to be disabled when airplane mode is on ? */ isAirplaneSensitive()157 private boolean isAirplaneSensitive() { 158 String airplaneModeRadios = Settings.Global.getString(mContext.getContentResolver(), 159 Settings.Global.AIRPLANE_MODE_RADIOS); 160 return airplaneModeRadios == null 161 || airplaneModeRadios.contains(Settings.Global.RADIO_WIFI); 162 } 163 164 /* Is Wi-Fi allowed to be re-enabled while airplane mode is on ? */ isAirplaneToggleable()165 private boolean isAirplaneToggleable() { 166 String toggleableRadios = Settings.Global.getString(mContext.getContentResolver(), 167 Settings.Global.AIRPLANE_MODE_TOGGLEABLE_RADIOS); 168 return toggleableRadios != null 169 && toggleableRadios.contains(Settings.Global.RADIO_WIFI); 170 } 171 getPersistedWifiState()172 private int getPersistedWifiState() { 173 final ContentResolver cr = mContext.getContentResolver(); 174 try { 175 return Settings.Global.getInt(cr, Settings.Global.WIFI_ON); 176 } catch (Settings.SettingNotFoundException e) { 177 Settings.Global.putInt(cr, Settings.Global.WIFI_ON, WIFI_DISABLED); 178 return WIFI_DISABLED; 179 } 180 } 181 getPersistedAirplaneModeOn()182 private boolean getPersistedAirplaneModeOn() { 183 return Settings.Global.getInt(mContext.getContentResolver(), 184 Settings.Global.AIRPLANE_MODE_ON, 0) == 1; 185 } 186 getPersistedScanAlwaysAvailable()187 private boolean getPersistedScanAlwaysAvailable() { 188 return mSettingsConfigStore.get( 189 WifiSettingsConfigStore.WIFI_SCAN_ALWAYS_AVAILABLE); 190 } 191 getPersistedWifiScoringEnabled()192 private boolean getPersistedWifiScoringEnabled() { 193 return mSettingsConfigStore.get( 194 WifiSettingsConfigStore.WIFI_SCORING_ENABLED); 195 } 196 } 197