Android Open Source - anti-piracy-android-app Network Change Receiver

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License

The source code is released under:

Apache License

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Java Source Code

package mil.nga.giat.asam.connectivity;
/*  ww w .  j av a  2s .c  om*/
import java.util.Collection;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.util.Log;

public class NetworkChangeReceiver extends BroadcastReceiver  {

    public interface ConnectivityEventListener {

        public void onAllDisconnected();
        
        public void onAnyConnected();
    }

    
  /**
   * Singleton.
   */
  private static NetworkChangeReceiver mNetworkChangeReceiver;

  /**
   * Do not use!
   */
  public NetworkChangeReceiver() {
    
  }
  
  public static NetworkChangeReceiver getInstance() {
    if (mNetworkChangeReceiver == null) {
      mNetworkChangeReceiver = new NetworkChangeReceiver();
    }
    return mNetworkChangeReceiver;
  }  
  
  private static final int sleepDelay = 10; // in seconds
  
  private static final String LOG_NAME = NetworkChangeReceiver.class.getName();

  private static Collection<ConnectivityEventListener> listeners = new CopyOnWriteArrayList<ConnectivityEventListener>();

  private static ScheduledExecutorService connectionFutureWorker = Executors.newSingleThreadScheduledExecutor();
  private static ScheduledFuture<?> connectionDataFuture = null;
  private static Boolean oldConnectionAvailabilityState = null;  
  
  @Override
  public void onReceive(final Context context, final Intent intent) {
    final ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    final NetworkInfo wifi = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    final NetworkInfo mobile = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
    
    final boolean newConnectionAvailabilityState = wifi.isConnected() || mobile.isConnected();
    
    // set the old state if it's the first time through!
    if (oldConnectionAvailabilityState == null) {
      oldConnectionAvailabilityState = !newConnectionAvailabilityState;
    }

    // was there a change in general connectivity?
    if (oldConnectionAvailabilityState ^ newConnectionAvailabilityState) {
      // is mobile data now on?
      if (newConnectionAvailabilityState) {
        Runnable task = new Runnable() {
          public void run() {
            Log.d(LOG_NAME, "CONNECTIVITY IS ON");
            for (ConnectivityEventListener listener : listeners) {
              listener.onAnyConnected();
            }
          }
        };
        connectionDataFuture = connectionFutureWorker.schedule(task, sleepDelay, TimeUnit.SECONDS);  
      } else {
        if (connectionDataFuture != null) {
          connectionDataFuture.cancel(false);
          connectionDataFuture = null;
        }
        Log.d(LOG_NAME, "CONNECTIVITY IS OFF");
        for (ConnectivityEventListener listener : listeners) {
          listener.onAllDisconnected();
        }
      }
    }
    
    // set the old states!
    oldConnectionAvailabilityState = newConnectionAvailabilityState;
  }

  public boolean addListener(ConnectivityEventListener listener) {
    return listeners.add(listener);
  }

  public boolean removeListener(ConnectivityEventListener listener) {
    return listeners.remove(listener);
  }
}

Java Source Code List