Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.widget.Toast; public class Main { public static boolean isNetworkOk(Context context) { ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = connMgr.getActiveNetworkInfo(); if (networkInfo != null && networkInfo.isConnected()) { return true; } else { Toast.makeText(context, "Network is disconnected", Toast.LENGTH_SHORT).show(); return false; } } }