Android Activity to help you out with manage connections. Need ACCESS_NETWORK_STATE permission, add this to your Manifest <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" > </uses-permission> Use your package and enjoy it!

ConnectionActivity.java

package com.use.your.package.here;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

/**
 * @author Gabriele Porcelli
 * 
 * Extends this Activity and implement connected() && disconnected(). Out of the box!
 * 
 *  Require ACCESS_NETWORK_STATE, add this to your Manifest
 *  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" >
    </uses-permission>
 */
public abstract class ConnectionActivity extends Activity {

  private BroadcastReceiver ConnectionReceiver = new BroadcastReceiver() {
		public void onReceive(Context context, Intent intent) {

			ConnectivityManager cm = (ConnectivityManager) context
					.getSystemService(Context.CONNECTIVITY_SERVICE);

			NetworkInfo activeNetwork = cm.getActiveNetworkInfo();// may return null
			if (activeNetwork != null) {
				boolean isConnected = activeNetwork.isConnected();
				if (isConnected) {
					connected(activeNetwork.getType());
				} else {
					disconnected();
				}
			} else {
				disconnected();
			}

		};
	};

	protected void onResume() {
		super.onResume();
		registerReceiver(ConnectionReceiver, new IntentFilter(
				ConnectivityManager.CONNECTIVITY_ACTION));
	};

	@Override
	protected void onPause() {
		unregisterReceiver(ConnectionReceiver);
		super.onPause();
	}

	/**
	 * Handle android network connected
	 * @param Connection type
	 * Hint runInUIThread
	 * 
	 *            example
	 * 
	 *            switch (type) { 
	 *            	case ConnectivityManager.TYPE_MOBILE:
	 *            		Log.i(ServiceConnection.class.getSimpleName(),
	 *            		"Connection type: Mobile"); break; 
	 *            	case ConnectivityManager.TYPE_WIFI:
	 *            		Log.i(ServiceConnection.class.getSimpleName(),
	 *            		"Connection type: Wifi"); break; 
	 *            	// API 13 
	 *           	 case ConnectivityManager.TYPE_ETHERNET:
	 *            		Log.i(ServiceConnection.class.getSimpleName(),
	 *           	 	"Connection type: Ethernet"); break; 
	 *           	// API 8 
	 *           	case ConnectivityManager.TYPE_WIMAX:
	 *           		Log.i(ServiceConnection.class.getSimpleName(),
	 *           	 	"Connection type: WiMax"); break;
	 *           	default: throw new
	 *            	IllegalStateException(
	 *            	"Connectivity type not supported! ConnectivityManager value:"
	 *            	+ type);
	 *            }
	 */
	protected abstract void connected(int type);

	/**
	 * Handle Android network disconnected
	 * Hint runInUIThread
	 */
	protected abstract void disconnected();

}