Java tutorial
//package com.java2s; import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean isNetworkAvailable(Context ctx) { int networkStatePermission = ctx.checkCallingOrSelfPermission(Manifest.permission.ACCESS_NETWORK_STATE); if (networkStatePermission == PackageManager.PERMISSION_GRANTED) { ConnectivityManager mConnectivity = (ConnectivityManager) ctx .getSystemService(Context.CONNECTIVITY_SERVICE); // Skip if no connection, or background data disabled NetworkInfo info = mConnectivity.getActiveNetworkInfo(); if (info == null) { return false; } // Only update if WiFi int netType = info.getType(); // int netSubtype = info.getSubtype(); if ((netType == ConnectivityManager.TYPE_WIFI) || (netType == ConnectivityManager.TYPE_MOBILE)) { return info.isConnected(); } else { return false; } } else { return true; } } }