Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.NetworkInfo.State; import android.util.Log; public class Main { public static boolean isNetworkOnline(Context context) { try { ConnectivityManager conMan = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); State mobile = conMan.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState(); State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState(); Log.d("DEBUG", "mobile: " + mobile + ", wifi: " + wifi); if (mobile == NetworkInfo.State.CONNECTED || mobile == NetworkInfo.State.CONNECTING || wifi == NetworkInfo.State.CONNECTED || wifi == NetworkInfo.State.CONNECTING) { return true; } } catch (Exception e) { e.printStackTrace(); } return false; } }