handler 刷新界面，线程传值

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package com.example.button_test;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
   private Button button;
   private int i = 60;

   private final static int SHOW_TOAST = 0x011;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);


       button = (Button) findViewById(R.id.button);
       button.setTextSize(25);

       button.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {
               // TODO Auto-generated method stub
               handler.post(runnable);
               Toast.makeText(MainActivity.this, "dianj", Toast.LENGTH_SHORT).show();


               //带值传递

               /*
               * 值 detailList_paging = 值（）；
               * msg.what = INTEGRALDETAIL_DETAIL_REFRESH;
                   msg.obj = detailList_paging;
                   handler.sendMessage(msg);
               */
           }
       });
   }

   Runnable runnable = new Runnable() {

       @Override
       public void run() {
           // TODO Auto-generated method stub


           handler.sendEmptyMessage(SHOW_TOAST);
           //开始
           handler.postDelayed(runnable, 1000);
           //停止
//           handler.removeCallbacks(runnable);

       }
   };

   private Handler handler = new Handler(){
       public void handleMessage(Message msg) {
           switch (msg.what){
           case SHOW_TOAST:
               button.setText("这是测试倒计时"+i);
               i=i-1;
               break;

               //有值
           /*
           *
           * case SHOW_TOAST:
           * 值 detailList_paging = （值）msg.obj；
           *
               */

           default:
               break;
           }

       }
   };

}

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