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/*
* Copyright (C) 2010 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.settings.wifi;
import com.android.settings.R;
import com.android.settings.WirelessSettings;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.NetworkInfo;
import android.net.wifi.SupplicantState;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.preference.Preference;
import android.preference.CheckBoxPreference;
import android.provider.Settings;
import android.text.TextUtils;
import android.widget.Toast;
import java.util.concurrent.atomic.AtomicBoolean;
public class WifiEnabler implements Preference.OnPreferenceChangeListener {
private final Context mContext;
private final CheckBoxPreference mCheckBox;
private final CharSequence mOriginalSummary;
private AtomicBoolean mConnected = new AtomicBoolean(false);
private final WifiManager mWifiManager;
private final IntentFilter mIntentFilter;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) {
handleWifiStateChanged(intent.getIntExtra(
WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN));
} else if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION.equals(action)) {
if (!mConnected.get()) {
handleStateChanged(WifiInfo.getDetailedStateOf((SupplicantState)
intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE)));
}
} else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) {
NetworkInfo info = (NetworkInfo) intent.getParcelableExtra(
WifiManager.EXTRA_NETWORK_INFO);
mConnected.set(info.isConnected());
handleStateChanged(info.getDetailedState());
}
}
};
public WifiEnabler(Context context, CheckBoxPreference checkBox) {
mContext = context;
mCheckBox = checkBox;
mOriginalSummary = checkBox.getSummary();
checkBox.setPersistent(false);
mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
mIntentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
// The order matters! We really should not depend on this. :(
mIntentFilter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
mIntentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);
}
public void resume() {
// Wi-Fi state is sticky, so just let the receiver update UI
mContext.registerReceiver(mReceiver, mIntentFilter);
mCheckBox.setOnPreferenceChangeListener(this);
}
public void pause() {
mContext.unregisterReceiver(mReceiver);
mCheckBox.setOnPreferenceChangeListener(null);
}
public boolean onPreferenceChange(Preference preference, Object value) {
boolean enable = (Boolean) value;
// Show toast message if Wi-Fi is not allowed in airplane mode
if (enable && !WirelessSettings
.isRadioAllowed(mContext, Settings.System.RADIO_WIFI)) {
Toast.makeText(mContext, R.string.wifi_in_airplane_mode,
Toast.LENGTH_SHORT).show();
return false;
}
/**
* Disable tethering if enabling Wifi
*/
int wifiApState = mWifiManager.getWifiApState();
if (enable && ((wifiApState == WifiManager.WIFI_AP_STATE_ENABLING) ||
(wifiApState == WifiManager.WIFI_AP_STATE_ENABLED))) {
mWifiManager.setWifiApEnabled(null, false);
}
if (mWifiManager.setWifiEnabled(enable)) {
mCheckBox.setEnabled(false);
} else {
mCheckBox.setSummary(R.string.wifi_error);
}
// Don't update UI to opposite state until we're sure
return false;
}
private void handleWifiStateChanged(int state) {
switch (state) {
case WifiManager.WIFI_STATE_ENABLING:
mCheckBox.setSummary(R.string.wifi_starting);
mCheckBox.setEnabled(false);
break;
case WifiManager.WIFI_STATE_ENABLED:
mCheckBox.setChecked(true);
mCheckBox.setSummary(null);
mCheckBox.setEnabled(true);
break;
case WifiManager.WIFI_STATE_DISABLING:
mCheckBox.setSummary(R.string.wifi_stopping);
mCheckBox.setEnabled(false);
break;
case WifiManager.WIFI_STATE_DISABLED:
mCheckBox.setChecked(false);
mCheckBox.setSummary(mOriginalSummary);
mCheckBox.setEnabled(true);
break;
default:
mCheckBox.setChecked(false);
mCheckBox.setSummary(R.string.wifi_error);
mCheckBox.setEnabled(true);
}
}
private void handleStateChanged(NetworkInfo.DetailedState state) {
// WifiInfo is valid if and only if Wi-Fi is enabled.
// Here we use the state of the check box as an optimization.
if (state != null && mCheckBox.isChecked()) {
WifiInfo info = mWifiManager.getConnectionInfo();
if (info != null) {
mCheckBox.setSummary(Summary.get(mContext, info.getSSID(), state));
}
}
}
}
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