/*
* Copyright (C) 2006 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 info.guardianproject.otr.app.im.app;
import java.util.HashMap;
import java.util.Iterator;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
/**
* A wrapper for a broadcast receiver that provides network connectivity state
* information, independent of network type (mobile, Wi-Fi, etc.). {@hide
*
*
* }
*/
public class NetworkConnectivityListener extends BroadcastReceiver {
private static final String TAG = "NetworkConnectivityListener";
private Context mContext;
private static HashMap<Handler, Integer> mHandlers = new HashMap<Handler, Integer>();
private State mState;
private boolean mListening;
private String mReason;
private boolean mIsFailover;
/** Network connectivity information */
private NetworkInfo mNetworkInfo;
/**
* In case of a Disconnect, the connectivity manager may have already
* established, or may be attempting to establish, connectivity with another
* network. If so, {@code mOtherNetworkInfo} will be non-null.
*/
private NetworkInfo mOtherNetworkInfo;
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
/*
if (!action.equals(ConnectivityManager.CONNECTIVITY_ACTION) || mListening == false) {
Log.w(TAG, "onReceived() called with " + mState.toString() + " and " + intent);
return;
}*/
boolean noConnectivity = intent.getBooleanExtra(
ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
mNetworkInfo = (NetworkInfo) intent
.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
mOtherNetworkInfo = (NetworkInfo) intent
.getParcelableExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO);
mReason = intent.getStringExtra(ConnectivityManager.EXTRA_REASON);
mIsFailover = intent.getBooleanExtra(ConnectivityManager.EXTRA_IS_FAILOVER, false);
//let's just check the state of our active network to set this value
if (isNetworkAvailableAndConnected(context.getApplicationContext())) {
mState = State.CONNECTED;
} else {
mState = State.NOT_CONNECTED;
}
/*
Log.d(TAG, "onReceive(): mNetworkInfo="
utoConnect + mNetworkInfo
+ " mOtherNetworkInfo = "
+ (mOtherNetworkInfo == null ? "[none]" : mOtherNetworkInfo + " noConn="
+ noConnectivity) + " mState=" + mState);*/
if (mHandlers != null)
{
// Notifiy any handlers.
Iterator<Handler> it = mHandlers.keySet().iterator();
while (it.hasNext()) {
Handler target = it.next();
Message message = Message.obtain(target, mHandlers.get(target));
target.sendMessage(message);
}
}
}
public enum State {
UNKNOWN,
/** This state is returned if there is connectivity to any network **/
CONNECTED,
/**
* This state is returned if there is no connectivity to any network.
* This is set to true under two circumstances: <ul> <li>When
* connectivity is lost to one network, and there is no other available
* network to attempt to switch to.</li> <li>When connectivity is lost
* to one network, and the attempt to switch to another network
* fails.</li>
*/
NOT_CONNECTED
}
/** Create a new NetworkConnectivityListener. */
public NetworkConnectivityListener() {
mState = State.UNKNOWN;
}
/**
* This method starts listening for network connectivity state changes.
*
* @param context
*/
public synchronized void startListening(Context context) {
if (!mListening) {
mContext = context;
IntentFilter filter = new IntentFilter();
filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
context.registerReceiver(this, filter);
mListening = true;
}
}
/** This method stops this class from listening for network changes. */
public synchronized void stopListening() {
if (mListening) {
mContext.unregisterReceiver(this);
mContext = null;
mNetworkInfo = null;
mOtherNetworkInfo = null;
mIsFailover = false;
mReason = null;
mListening = false;
}
}
/**
* This methods registers a Handler to be called back onto with the
* specified what code when the network connectivity state changes.
*
* @param target The target handler.
* @param what The what code to be used when posting a message to the
* handler.
*/
public static void registerHandler(Handler target, int what) {
mHandlers.put(target, what);
}
/**
* This methods unregisters the specified Handler.
*
* @param target
*/
public static void unregisterHandler(Handler target) {
mHandlers.remove(target);
}
public State getState() {
return mState;
}
/**
* Return the NetworkInfo associated with the most recent connectivity
* event.
*
* @return {@code NetworkInfo} for the network that had the most recent
* connectivity event.
*/
public NetworkInfo getNetworkInfo() {
return mNetworkInfo;
}
/**
* If the most recent connectivity event was a DISCONNECT, return any
* information supplied in the broadcast about an alternate network that
* might be available. If this returns a non-null value, then another
* broadcast should follow shortly indicating whether connection to the
* other network succeeded.
*
* @return NetworkInfo
*/
public NetworkInfo getOtherNetworkInfo() {
return mOtherNetworkInfo;
}
/**
* Returns true if the most recent event was for an attempt to switch over
* to a new network following loss of connectivity on another network.
*
* @return {@code true} if this was a failover attempt, {@code false}
* otherwise.
*/
public boolean isFailover() {
return mIsFailover;
}
/**
* An optional reason for the connectivity state change may have been
* supplied. This returns it.
*
* @return the reason for the state change, if available, or {@code null}
* otherwise.
*/
public String getReason() {
return mReason;
}
public boolean isNetworkAvailableAndConnected (Context context) {
ConnectivityManager manager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo nInfo = manager.getActiveNetworkInfo();
if (nInfo != null)
{
Log.d(ImApp.LOG_TAG,"network state: available=" + nInfo.isAvailable() + " connected/connecting=" + nInfo.isConnectedOrConnecting());
return nInfo.isAvailable() && nInfo.isConnectedOrConnecting();
}
else
return false; //no network info is a bad idea
}
}