Android模仿jquery异步请求

01	package com.xbl.task;

02

03	import java.io.BufferedReader;

04	import java.io.InputStream;

05	import java.io.InputStreamReader;

06	import java.net.URL;

07	import java.util.concurrent.Executor;

08	import java.util.concurrent.ExecutorService;

09	import java.util.concurrent.Executors;

10

11	import android.os.Bundle;

12	import android.os.Handler;

13	import android.os.Message;

14	import android.util.Log;

15

16

17	public class JQuery {

18

19	private static final String KEY = "key";

20	private static String TAG = "JQuery";

21	private static final int N = 5;// 5个工人

22	private static final Executor worker = Executors.newFixedThreadPool(N);// 线程池

23	private static final Handler handler = new Handler(){

24

@Override

25	public void handleMessage(Message msg) {

26	TaskListener listener = (TaskListener)msg.obj;

27	Object result = msg.getData();

28	if(listener !=null ){

29	listener.callBack(result);

30

}

31	destory();

32

}

33

};

34

35	private JQuery(){

36

}

37

38	public static void execute(final String url,final TaskListener listener){

39	worker.execute(new Runnable() {

40

@Override

41	public void run() {

42	String result = null;

43

try {

44	result = WebUtil.get(url);

45	} catch (Exception e) {

46	Log.e(TAG, e.getMessage());

47

}

48

49	Message msg = new Message();

50	Bundle data = new Bundle();

51	data.putSerializable(KEY, result);

52	msg.setData(data);

53	msg.obj = listener;

54	handler.sendMessage(msg);

55

}

56

});

57

}

58

59

//销毁线程

60	private static void destory() {

61	if (worker != null && worker instanceof ExecutorService) {

62	ExecutorService es = (ExecutorService) worker;

63	if (!es.isShutdown()) {

64	es.shutdown();

65

}

66

}

67

}

68

69	public interface TaskListener{

70	public void callBack(Object result);

71

}

72

/**

73

*

74	* 不必太在意此处代码，只是示例

75

*

76

*/

77	public static class WebUtil{

78

79	public static String get(String url) throws Exception{

80	InputStream inputStream = new URL(url).openStream();

81	StringBuilder strBuilder = new StringBuilder();

82	BufferedReader reader = new BufferedReader(newInputStreamReader(inputStream));

83	for (String s = reader.readLine(); s != null; s = reader.readLine())

84	strBuilder.append(s);

85

86	inputStream.close();

87	return strBuilder.toString();

88

}

89

}

90

}

2. [代码][Java]代码

01

//调用方法：

02	JQuery.execute("http://weather.news.qq.com/inc/minisite_125.js", newJQuery.TaskListener() {

03

@Override

04	public void callBack(Object result) {

05	TextView t = new TextView(TaskDemoActivity.this);

06	t.setText(String.valueOf(result));

07	LinearLayout layout = (LinearLayout)findViewById(R.id.layout1);

08	layout.addView(t);

09

}

10

});