Java tutorial
//package com.java2s; import android.app.Activity; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean isOnline(Context context) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Activity.CONNECTIVITY_SERVICE); NetworkInfo info = manager.getActiveNetworkInfo(); return info != null && info.isConnected(); } }