AsnycTask更新主线程UI基本代码

<span style="font-size:18px;">package com.example.asynctask;import android.app.Activity;import android.os.AsyncTask;import android.os.Bundle;import android.util.Log;import android.widget.TextView;public class MainActivity extends Activity {private TextView text;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);text = (TextView) findViewById(R.id.text);MyLongTimeTask task = new MyLongTimeTask(8);task.execute(1000, 2000);}//注意运行时里面方法的运行顺序private class MyLongTimeTask extends AsyncTask {//第一运行public MyLongTimeTask(int data) {Log.d("MyLongTimeTask", data + "");}//第二运行，主要做一些数据的初始化@Overrideprotected void onPreExecute() {Log.d("onPreExecute", "done!");}//第三运行，主要做耗时操作@Overrideprotected Object doInBackground(Object... params) {int a = (Integer) params[0];int b = (Integer) params[1];Log.d("doInBackground", a + "," + b);String result = a + "+" + b + "=" + (a + b);return result;}//第四运行。更新UI界面@Overrideprotected void onPostExecute(Object result) {Log.d("onPostExecute", result + "");text.setText(result + "");}}}</span>