在Android上進行倒計時而不凍結應用程序？

Question

如何在不凍結Android應用程序的情況下進行倒計時？例如倒數計數10到1。

Answer 1

從我的問題中可以得出，你很可能會遇到麻煩，因爲你在主（UI）線程中進行某種倒計時。這肯定會導致應用在定時器期間凍結。只需使用一個定時器，做這樣的事情：

//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.