AsyncTask的简单应用

package com.gyliu.demo; import java.util.concurrent.TimeUnit; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class UIHandlerActivity extends Activity { private static final int OPER_RESAULT = 0x01; private Button btn_start; private static int time = 0; private TextView tv_resault; private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch(msg.what) { case OPER_RESAULT: String resault = (String) msg.obj; tv_resault.setText(resault); break; } } }; private Runnable operation = new Runnable() { @Override public void run() { for(int i = 1 ; i <= 1000 ; i++) for(int j=1 ; j <= 10000 ; j++); mHandler.sendMessage(mHandler.obtainMessage(OPER_RESAULT, "第" + (++time) + "次运算")); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ui_handler_activity); btn_start = (Button) findViewById(R.id.btn_timeout); tv_resault = (TextView) findViewById(R.id.tv_resault); btn_start.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Thread mThread = new Thread(operation); mThread.start(); } }); } }