/*
* 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 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.provider.Settings;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.Toast;
import com.android.settings.R;
import com.android.settings.WirelessSettings;
import java.util.concurrent.atomic.AtomicBoolean;
public class WifiEnabler implements CompoundButton.OnCheckedChangeListener {
private final Context mContext;
private Switch mSwitch;
private AtomicBoolean mConnected = new AtomicBoolean(false);
private final WifiManager mWifiManager;
private boolean mStateMachineEvent;
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, Switch switch_) {
mContext = context;
mSwitch = switch_;
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);
mSwitch.setOnCheckedChangeListener(this);
}
public void pause() {
mContext.unregisterReceiver(mReceiver);
mSwitch.setOnCheckedChangeListener(null);
}
public void setSwitch(Switch switch_) {
if (mSwitch == switch_) return;
mSwitch.setOnCheckedChangeListener(null);
mSwitch = switch_;
mSwitch.setOnCheckedChangeListener(this);
final int wifiState = mWifiManager.getWifiState();
boolean isEnabled = wifiState == WifiManager.WIFI_STATE_ENABLED;
boolean isDisabled = wifiState == WifiManager.WIFI_STATE_DISABLED;
mSwitch.setChecked(isEnabled);
mSwitch.setEnabled(isEnabled || isDisabled);
}
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//Do nothing if called as a result of a state machine event
if (mStateMachineEvent) {
return;
}
// Show toast message if Wi-Fi is not allowed in airplane mode
if (isChecked && !WirelessSettings.isRadioAllowed(mContext, Settings.System.RADIO_WIFI)) {
Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
// Reset switch to off. No infinite check/listenenr loop.
buttonView.setChecked(false);
}
// Disable tethering if enabling Wifi
int wifiApState = mWifiManager.getWifiApState();
if (isChecked && ((wifiApState == WifiManager.WIFI_AP_STATE_ENABLING) ||
(wifiApState == WifiManager.WIFI_AP_STATE_ENABLED))) {
mWifiManager.setWifiApEnabled(null, false);
}
if (mWifiManager.setWifiEnabled(isChecked)) {
// Intent has been taken into account, disable until new state is active
mSwitch.setEnabled(false);
} else {
// Error
Toast.makeText(mContext, R.string.wifi_error, Toast.LENGTH_SHORT).show();
}
}
private void handleWifiStateChanged(int state) {
switch (state) {
case WifiManager.WIFI_STATE_ENABLING:
mSwitch.setEnabled(false);
break;
case WifiManager.WIFI_STATE_ENABLED:
setSwitchChecked(true);
mSwitch.setEnabled(true);
break;
case WifiManager.WIFI_STATE_DISABLING:
mSwitch.setEnabled(false);
break;
case WifiManager.WIFI_STATE_DISABLED:
setSwitchChecked(false);
mSwitch.setEnabled(true);
break;
default:
setSwitchChecked(false);
mSwitch.setEnabled(true);
break;
}
}
private void setSwitchChecked(boolean checked) {
if (checked != mSwitch.isChecked()) {
mStateMachineEvent = true;
mSwitch.setChecked(checked);
mStateMachineEvent = false;
}
}
private void handleStateChanged(@SuppressWarnings("unused") NetworkInfo.DetailedState state) {
// After the refactoring from a CheckBoxPreference to a Switch, this method is useless since
// there is nowhere to display a summary.
// This code is kept in case a future change re-introduces an associated text.
/*
// WifiInfo is valid if and only if Wi-Fi is enabled.
// Here we use the state of the switch as an optimization.
if (state != null && mSwitch.isChecked()) {
WifiInfo info = mWifiManager.getConnectionInfo();
if (info != null) {
//setSummary(Summary.get(mContext, info.getSSID(), state));
}
}
*/
}
}