在Android上进行倒计时而不冻结应用程序？

Question

如何在不冻结Android应用程序的情况下进行倒计时？例如倒数计数10到1。

Answer 1

从我的问题中可以得出，你很可能会遇到麻烦，因为你在主（UI）线程中进行某种倒计时。这肯定会导致应用在定时器期间冻结。只需使用一个定时器，做这样的事情：

//global variables 
private int currTime = 10; 
private TextView myTimer;//need to initialize this in your layout using findViewById, or programmatically 

final Timer t = new Timer(); 
currTime = 10; 
t.scheduleAtFixedRate(new TimerTask() { 
    @Override 
    public void run() { 
     runOnUiThread(new Runnable() {//You need this, or a Handler to ensure the UI is changed on the correct thread. 
      currTime--; 
      myTimer.setText(currTime);//myTimer is a global reference to your TextView. 
      if (currTime == 0) 
       t.cancel(); 
     }); 
    } 
}, 10000);//note that this is the duration in milliseconds (1/1000 of a second) - so 10000 for 10 seconds.