1 /* 2 * Copyright (C) 2010 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.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import android.net.NetworkInfo; 24 import android.net.wifi.SupplicantState; 25 import android.net.wifi.WifiInfo; 26 import android.net.wifi.WifiManager; 27 import android.os.Handler; 28 import android.os.Message; 29 import android.provider.Settings; 30 import android.widget.Switch; 31 import android.widget.Toast; 32 33 import com.android.settings.R; 34 import com.android.settings.WirelessSettings; 35 import com.android.settings.search.Index; 36 import com.android.settings.widget.SwitchBar; 37 38 import java.util.concurrent.atomic.AtomicBoolean; 39 40 public class WifiEnabler implements SwitchBar.OnSwitchChangeListener { 41 private Context mContext; 42 private SwitchBar mSwitchBar; 43 private boolean mListeningToOnSwitchChange = false; 44 private AtomicBoolean mConnected = new AtomicBoolean(false); 45 46 private final WifiManager mWifiManager; 47 private boolean mStateMachineEvent; 48 private final IntentFilter mIntentFilter; 49 private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 50 @Override 51 public void onReceive(Context context, Intent intent) { 52 String action = intent.getAction(); 53 if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) { 54 handleWifiStateChanged(intent.getIntExtra( 55 WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN)); 56 } else if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION.equals(action)) { 57 if (!mConnected.get()) { 58 handleStateChanged(WifiInfo.getDetailedStateOf((SupplicantState) 59 intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE))); 60 } 61 } else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) { 62 NetworkInfo info = (NetworkInfo) intent.getParcelableExtra( 63 WifiManager.EXTRA_NETWORK_INFO); 64 mConnected.set(info.isConnected()); 65 handleStateChanged(info.getDetailedState()); 66 } 67 } 68 }; 69 70 private static final String EVENT_DATA_IS_WIFI_ON = "is_wifi_on"; 71 private static final int EVENT_UPDATE_INDEX = 0; 72 73 private Handler mHandler = new Handler() { 74 @Override 75 public void handleMessage(Message msg) { 76 switch (msg.what) { 77 case EVENT_UPDATE_INDEX: 78 final boolean isWiFiOn = msg.getData().getBoolean(EVENT_DATA_IS_WIFI_ON); 79 Index.getInstance(mContext).updateFromClassNameResource( 80 WifiSettings.class.getName(), true, isWiFiOn); 81 break; 82 } 83 } 84 }; 85 86 public WifiEnabler(Context context, SwitchBar switchBar) { 87 mContext = context; 88 mSwitchBar = switchBar; 89 90 mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); 91 92 mIntentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION); 93 // The order matters! We really should not depend on this. :( 94 mIntentFilter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION); 95 mIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); 96 97 setupSwitchBar(); 98 } 99 100 public void setupSwitchBar() { 101 final int state = mWifiManager.getWifiState(); 102 handleWifiStateChanged(state); 103 if (!mListeningToOnSwitchChange) { 104 mSwitchBar.addOnSwitchChangeListener(this); 105 mListeningToOnSwitchChange = true; 106 } 107 mSwitchBar.show(); 108 } 109 110 public void teardownSwitchBar() { 111 if (mListeningToOnSwitchChange) { 112 mSwitchBar.removeOnSwitchChangeListener(this); 113 mListeningToOnSwitchChange = false; 114 } 115 mSwitchBar.hide(); 116 } 117 118 public void resume(Context context) { 119 mContext = context; 120 // Wi-Fi state is sticky, so just let the receiver update UI 121 mContext.registerReceiver(mReceiver, mIntentFilter); 122 if (!mListeningToOnSwitchChange) { 123 mSwitchBar.addOnSwitchChangeListener(this); 124 mListeningToOnSwitchChange = true; 125 } 126 } 127 128 public void pause() { 129 mContext.unregisterReceiver(mReceiver); 130 if (mListeningToOnSwitchChange) { 131 mSwitchBar.removeOnSwitchChangeListener(this); 132 mListeningToOnSwitchChange = false; 133 } 134 } 135 136 private void handleWifiStateChanged(int state) { 137 switch (state) { 138 case WifiManager.WIFI_STATE_ENABLING: 139 mSwitchBar.setEnabled(false); 140 break; 141 case WifiManager.WIFI_STATE_ENABLED: 142 setSwitchBarChecked(true); 143 mSwitchBar.setEnabled(true); 144 updateSearchIndex(true); 145 break; 146 case WifiManager.WIFI_STATE_DISABLING: 147 mSwitchBar.setEnabled(false); 148 break; 149 case WifiManager.WIFI_STATE_DISABLED: 150 setSwitchBarChecked(false); 151 mSwitchBar.setEnabled(true); 152 updateSearchIndex(false); 153 break; 154 default: 155 setSwitchBarChecked(false); 156 mSwitchBar.setEnabled(true); 157 updateSearchIndex(false); 158 } 159 } 160 161 private void updateSearchIndex(boolean isWiFiOn) { 162 mHandler.removeMessages(EVENT_UPDATE_INDEX); 163 164 Message msg = new Message(); 165 msg.what = EVENT_UPDATE_INDEX; 166 msg.getData().putBoolean(EVENT_DATA_IS_WIFI_ON, isWiFiOn); 167 mHandler.sendMessage(msg); 168 } 169 170 private void setSwitchBarChecked(boolean checked) { 171 mStateMachineEvent = true; 172 mSwitchBar.setChecked(checked); 173 mStateMachineEvent = false; 174 } 175 176 private void handleStateChanged(@SuppressWarnings("unused") NetworkInfo.DetailedState state) { 177 // After the refactoring from a CheckBoxPreference to a Switch, this method is useless since 178 // there is nowhere to display a summary. 179 // This code is kept in case a future change re-introduces an associated text. 180 /* 181 // WifiInfo is valid if and only if Wi-Fi is enabled. 182 // Here we use the state of the switch as an optimization. 183 if (state != null && mSwitch.isChecked()) { 184 WifiInfo info = mWifiManager.getConnectionInfo(); 185 if (info != null) { 186 //setSummary(Summary.get(mContext, info.getSSID(), state)); 187 } 188 } 189 */ 190 } 191 192 @Override 193 public void onSwitchChanged(Switch switchView, boolean isChecked) { 194 //Do nothing if called as a result of a state machine event 195 if (mStateMachineEvent) { 196 return; 197 } 198 // Show toast message if Wi-Fi is not allowed in airplane mode 199 if (isChecked && !WirelessSettings.isRadioAllowed(mContext, Settings.Global.RADIO_WIFI)) { 200 Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show(); 201 // Reset switch to off. No infinite check/listenenr loop. 202 mSwitchBar.setChecked(false); 203 return; 204 } 205 206 // Disable tethering if enabling Wifi 207 int wifiApState = mWifiManager.getWifiApState(); 208 if (isChecked && ((wifiApState == WifiManager.WIFI_AP_STATE_ENABLING) || 209 (wifiApState == WifiManager.WIFI_AP_STATE_ENABLED))) { 210 mWifiManager.setWifiApEnabled(null, false); 211 } 212 213 if (!mWifiManager.setWifiEnabled(isChecked)) { 214 // Error 215 mSwitchBar.setEnabled(true); 216 Toast.makeText(mContext, R.string.wifi_error, Toast.LENGTH_SHORT).show(); 217 } 218 } 219 } 220