public boolean isNetworkAvailable(Context context) {
ConnectivityManager connectivityManager
= (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
} <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
public boolean IsInternetConnected()
{
try {
Process ipProcess = Runtime.getRuntime().exec("/system/bin/ping -c 1 4.2.2.4");
int exitValue = ipProcess.waitFor();
return (exitValue == 0);
} catch (IOException e) { e.printStackTrace(); }
catch (InterruptedException e) { e.printStackTrace(); }
return false;
} System.Diagnostics.Process.Start("processName"); public Process exec(String prog) throws java.io.IOException {
return exec(prog, null, null);
} public abstract int waitFor() throws InterruptedException;
<uses-permission android:name="android.permission.INTERNET"/>
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
if (!url.getHost().equals(urlConnection.getURL().getHost())) {
// we were redirected! Kick the user out to the browser to sign on?
...
} finally {
urlConnection.disconnect();
}
} 
(function(target){
var privateDoWork = function(name) {
return name +" is working";
};
var Employee = function(name) {
this.name = name;
}
Employee.prototype = {
doWork: function() {
return privateDoWork(this.name);
}
}
target.Employee = Employee;
}(window)); var privateDoWork = function(name) {
return name +" is working";
};
var Employee = function(name) {
this.name = name;
}
Employee.prototype = {
doWork: function() {
return privateDoWork(this.name);
}
}
exports.Employee = Employee; var Employee = require("./Employee").Employee;
var e1 = new Employee("Vahid");
console.log(e1.doWork()); define(function(){
var privateDoWork = function(name) {
// ...
};
var Employee = function(name) {
// ...
}
return Employee;
}); define(["employee"], function(Employee){
var e = new Employee("Vahid");
}); export class Employee {
constructor(name) {
this[s_name] = name;
}
get name() {
return this[s_name];
}
doWork() {
return `${this.name} is working`;
}
} import {Employee} from "./employee";
var e1 = new Employee("Vahid");
console.log(e1.doWork()); export function multiply (x, y) {
return x * y;
}; var hello = 'Hello World',
multiply = function (x, y) {
return x * y;
};
export { hello, multiply }; export let log = function(employee) {
console.log(employee.name);
}
export let defaultRaise = 0.03;
export let modelEmployee = new Employee("Vahid"); import {Employee, log, defaultRaise, modelEmployee} from "./employee";
log(modelEmployee); module m from "./employee";
console.log(m.defaultRaise);
var e1 = new m.Employee("Vahid");
console.log(e1.doWork()); import * from "./employee";
import {Employee} from "./employee"; export default class Employee { import factory from "./employee";
var e1 = new factory("Vahid");
console.log(e1.doWork()); export hello = 'Hello World';
export default function (x, y) {
return x * y;
}; import pow2, { hello } from 'modules'; let privateFunction = function() {
}
export default class Employee { let s_name = Symbol();
export class Employee {
constructor(name) {
this[s_name] = name;
}
get name() {
return this[s_name];
}
doWork() {
return `${this.name} is working`;
}
} 
$('#dbcat').change(function () {
var selectedItem = $(this).val();
$.post( "-----url----", { item: selectedItem } );
}); در مورد پشت صحنهاش هم میتونید توضیح بدید؟ بالاخره اینجا سایت برنامه نویسی است. آیا شبیه به این مطلب است یا این مطلب؟
ضمنا فید سایت شما استاندارد نیست و xml اول اون هدر درستی نداره. میتونید از این کتابخونه ایده بگیرید برای اصلاحش
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