Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean networkCanUse(Context context) { ConnectivityManager connectivityManager = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo netinfo = connectivityManager.getActiveNetworkInfo(); if (netinfo != null && netinfo.isConnected()) { return true; } return false; } }