在android开发中经常会使用异步请求数据，通常会使用handler或者AsyncTask去做，handler 配合message 使用起来比较麻烦，AsyncTask 线程池只允许128个线程工作，会有溢出的问题，（当然一般情况不会有那么多线程同时工作的）所以写了这个代码，还望高手指正！
[Java]代码
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package com.xbl.task;
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import java.io.BufferedReader;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.URL;
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import java.util.concurrent.Executor;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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public class JQuery {
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private static final String KEY = "key";
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private static String TAG = "JQuery";
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private static final int N = 5;// 5个工人
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private static final Executor worker = Executors.newFixedThreadPool(N);// 线程池
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private static final Handler handler = new Handler(){
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@Override
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public void handleMessage(Message msg) {
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TaskListener listener = (TaskListener)msg.obj;
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Object result = msg.getData();
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if(listener !=null ){
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listener.callBack(result);
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}
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destory();
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}
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};
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private JQuery(){
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}
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public static void execute(final String url,final TaskListener listener){
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worker.execute(new Runnable() {
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@Override
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public void run() {
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String result = null;
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try {
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result = WebUtil.get(url);
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} catch (Exception e) {
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Log.e(TAG, e.getMessage());
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}
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Message msg = new Message();
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Bundle data = new Bundle();
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data.putSerializable(KEY, result);
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msg.setData(data);
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msg.obj = listener;
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handler.sendMessage(msg);
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}
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});
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}
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//销毁线程
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private static void destory() {
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if (worker != null && worker instanceof ExecutorService) {
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ExecutorService es = (ExecutorService) worker;
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if (!es.isShutdown()) {
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es.shutdown();
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}
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}
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}
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public interface TaskListener{
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public void callBack(Object result);
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}
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/**
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*
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* 不必太在意此处代码，只是示例
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*
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*/
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public static class WebUtil{
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public static String get(String url) throws Exception{
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InputStream inputStream = new URL(url).openStream();
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StringBuilder strBuilder = new StringBuilder();
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BufferedReader reader = new BufferedReader(newInputStreamReader(inputStream));
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for (String s = reader.readLine(); s != null; s = reader.readLine())
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strBuilder.append(s);
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inputStream.close();
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return strBuilder.toString();
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}
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}
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}
[代码] [Java]代码
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//调用方法：
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JQuery.execute("http://weather.news.qq.com/inc/minisite_125.js", newJQuery.TaskListener() {
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@Override
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public void callBack(Object result) {
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TextView t = new TextView(TaskDemoActivity.this);
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t.setText(String.valueOf(result));
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LinearLayout layout = (LinearLayout)findViewById(R.id.layout1);
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layout.addView(t);
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}
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});
