Java tutorial
//package com.java2s; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; public class Main { public static boolean checkConnection(Context context, boolean onlyWiFi) { ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetwork = cm.getActiveNetworkInfo(); boolean isConnected = activeNetwork != null && activeNetwork.isConnectedOrConnecting(); boolean isWiFi = activeNetwork != null && activeNetwork.getType() == ConnectivityManager.TYPE_WIFI; if (!onlyWiFi) { return isConnected; } else { return isConnected && isWiFi; } } }