126 lines
2.7 KiB
Java
126 lines
2.7 KiB
Java
/*
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* Copyright (C) 2012-2015 Tobias Brunner
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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package org.strongswan.android.logic;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.net.ConnectivityManager;
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import android.net.NetworkInfo;
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import java.util.LinkedList;
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public class NetworkManager extends BroadcastReceiver implements Runnable
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{
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private final Context mContext;
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private volatile boolean mRegistered;
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private Thread mEventNotifier;
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private LinkedList<Boolean> mEvents = new LinkedList<>();
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public NetworkManager(Context context)
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{
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mContext = context;
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}
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public void Register()
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{
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mEvents.clear();
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mRegistered = true;
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mEventNotifier = new Thread(this);
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mEventNotifier.start();
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mContext.registerReceiver(this, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
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}
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public void Unregister()
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{
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mContext.unregisterReceiver(this);
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mRegistered = false;
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synchronized (this)
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{
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notifyAll();
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}
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try
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{
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mEventNotifier.join();
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mEventNotifier = null;
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}
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catch (InterruptedException e)
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{
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e.printStackTrace();
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}
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}
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public boolean isConnected()
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{
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ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo info = null;
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if (cm != null)
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{
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info = cm.getActiveNetworkInfo();
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}
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return info != null && info.isConnected();
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}
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@Override
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public void onReceive(Context context, Intent intent)
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{
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synchronized (this)
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{
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mEvents.addLast(isConnected());
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notifyAll();
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}
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}
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@Override
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public void run()
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{
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while (mRegistered)
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{
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boolean connected;
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synchronized (this)
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{
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try
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{
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while (mRegistered && mEvents.isEmpty())
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{
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wait();
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}
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}
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catch (InterruptedException ex)
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{
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break;
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}
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if (!mRegistered)
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{
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break;
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}
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connected = mEvents.removeFirst();
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}
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/* call the native parts without holding the lock */
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networkChanged(!connected);
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}
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}
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/**
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* Notify the native parts about a network change
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*
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* @param disconnected true if no connection is available at the moment
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*/
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public native void networkChanged(boolean disconnected);
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}
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