标签:android des style blog class code
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 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 } [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 });
Android简单封装类似JQuery异步请求,布布扣,bubuko.com
标签:android des style blog class code
原文地址:http://www.cnblogs.com/xiaochao1234/p/3709073.html