1 package com.bvin.android.test.handler;2 3 import java.text.SimpleDateFormat;4 import java.util.Date;5 6 import android.app.Activity;7 import android.os.Bundle;8 import android.os.Handler;9 import android.util.Log;
10
11 public class AndroidTest_HandlerActivity extends Activity {
12     /** Called when the activity is first created. */
13     private Handler handler = new Handler();
14     private Runnable runnable  = new Runnable(){//推送runnable，定期2s执行一次
15
16
17
18         @Override
19         public void run() {
20             // TODO Auto-generated method stub
21             Log.e("计时后", printCurTime());
22             handler.postDelayed(runnable, 2000);
23         }
24
25     };
26     private Runnable runRemove  = new Runnable(){//移除runnable，在6s后移除
27
28
29
30         @Override
31         public void run() {
32             // TODO Auto-generated method stub
33
34             handler.removeCallbacks(runnable);
35         }
36
37     };
38     private String  printCurTime(){//获取当前时间
39
40         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");//格式样式
41         Date date = new Date(System.currentTimeMillis());//建立当前日期
42         //format.format(date)格式化日期时间
43         return format.format(date);
44     }
45     @Override
46     public void onCreate(Bundle savedInstanceState) {
47         super.onCreate(savedInstanceState);
48         setContentView(R.layout.main);
49         Log.e("计时前", printCurTime());
50         handler.post(runnable);//定期执行
51         handler.postDelayed(runRemove, 6000);//过6秒后执行
52
53     }
54 }

handler.post(runnable);//定期执行
handler.postDelayed(runRemove, 6000);//过6秒后执行

handler.postDelayed(runRemove, 6000);//过6秒后执行
handler.post(runnable);//定期执行