闪屏页和右上角的倒计时跳转

 1 package com.example.shanping;
 2 
 3 import java.lang.ref.WeakReference;
 4 
 5 import com.example.shanping.MyActivity.MyCountDownTimer;
 6 
 7 import android.os.Bundle;
 8 import android.os.CountDownTimer;
 9 import android.os.Handler;
10 import android.os.Message;
11 import android.app.Activity;
12 import android.content.Intent;
13 import android.util.Log;
14 import android.view.Menu;
15 import android.widget.TextView;
16 
17 public class MainActivity extends Activity {
18 
19     private MyCountDownTimer mc; 
20     private TextView tv;
21     @Override
22     protected void onCreate(Bundle savedInstanceState) {
23         super.onCreate(savedInstanceState);
24         setContentView(R.layout.activity_main);
25         tv = (TextView) findViewById(R.id.textView1); 
26         mc = new MyCountDownTimer(3000, 1000); 
27         mc.start();
28         handler.postDelayed(new Runnable() {
29             
30             @Override
31             public void run() {
32                 Intent intent=new Intent(MainActivity.this,MyActivity.class);
33                 startActivity(intent);
34             }
35         }, 3000);
36     }
37     private Handler handler=new Handler();
38     /** 
39        * 继承 CountDownTimer 防范 
40        * 
41        * 重写 父类的方法 onTick() 、 onFinish() 
42        */
43       
44       class MyCountDownTimer extends CountDownTimer { 
45         /** 
46          * 
47          * @param millisInFuture 
48          *      表示以毫秒为单位 倒计时的总数 
49          * 
50          *      例如 millisInFuture=1000 表示1秒 
51          * 
52          * @param countDownInterval 
53          *      表示 间隔 多少微秒 调用一次 onTick 方法 
54          * 
55          *      例如: countDownInterval =1000 ; 表示每1000毫秒调用一次onTick() 
56          * 
57          */
58         public MyCountDownTimer(long millisInFuture, long countDownInterval) { 
59           super(millisInFuture, countDownInterval); 
60         } 
61       
62         public void onFinish() { 
63           tv.setText("正在跳转"); 
64         } 
65       
66         public void onTick(long millisUntilFinished) { 
67           tv.setText("倒计时(" + millisUntilFinished / 1000 + ")"); 
68         } 
69 
70       }
71     
72 }