How to check different Network status in Android?

This code snippet checks which of your networks are available in android.

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package com.coderzheaven.pack;   import android.app.Activity; import android.content.Context; import android.net.ConnectivityManager; import android.os.Bundle; import android.widget.Toast;   public class CheckConnectionsDemo extends Activity {     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         checkAvailableConnection();     }           void checkAvailableConnection()     {         ConnectivityManager connMgr = (ConnectivityManager)         this.getSystemService(Context.CONNECTIVITY_SERVICE);                  final android.net.NetworkInfo wifi =         connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);                final android.net.NetworkInfo mobile =         connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);               if( wifi.isAvailable() ){             Toast.makeText(this, "Wifi Available" , Toast.LENGTH_LONG).show();         }         else if( mobile.isAvailable() ){             Toast.makeText(this, "3G Available" , Toast.LENGTH_LONG).show();         }         else{               Toast.makeText(this, "No Network Available" , Toast.LENGTH_LONG).show();         }     } }