Thread.sleep停止整个功能android [英] Thread.sleep stopping entire function android

问题描述

我有一个java函数，我想在中间延迟。

  frombox.setText（simpchi [rannum] +\\\
 [+ pinyin [rannum] +]）; 
字符串含义=意义[rannum]; 
尝试{
 Thread.sleep（500）; 
} catch（InterruptedException e）{
 Thread.currentThread（）。interrupt（）; 
 e.printStackTrace（）; 
} 
 tobox.setText（meaning.replace（/，\\\
））; 
  

我希望收件箱的文本发生变化，然后在0.5秒后更改收件箱的文本。 p>

但是，执行此操作时，整个函数会延迟，然后同时将收件箱和收件箱的文本更改。

我在做什么错了？对不起，如果这真的很简单，我对Java很陌生。

解决方案

您不应该调用 Thread.sleep（）在UI线程中。 不要！
您应该做什么：

  Handler handler = new Handler（）; 
 handler.postDelayed（new Runnable（）{
 public void run（）{
 tobox.setText（meaning.replace（/，\\\
））; 
} 
}，500）; // 500 ms 
  

或简单地（Credits to zapl） p>

  tobox.postDelayed（new Runnable（）{
 public void run（）{
 tobox.setText .replace（/，\\\
））; 
} 
}，500）; // 500 ms 
  

通过这种方式，第二个settext将被延迟并在UI线程中运行。 / p>

I have a java function that I want to delay in the middle.

frombox.setText(simpchi[rannum] + "\n[" + pinyin[rannum] + "]");
String meaning = meanings[rannum];
try {
        Thread.sleep(500);
    } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
        e.printStackTrace();
    }
tobox.setText(meaning.replace("/", "\n"));

I want the frombox's text to change, then after 0.5 seconds, the tobox's text to change.

However, when executing this, the entire function delays, then the frombox and tobox's text changes at the same time.

What am I doing wrong? Sorry if this is really simple; I'm very new to java.

解决方案

You shouldn't call Thread.sleep() in the UI thread. Never! What you should do:

Handler handler = new Handler();
handler.postDelayed(new Runnable(){ 
    public void run(){
        tobox.setText(meaning.replace("/", "\n"));
    }
}, 500); // 500 ms

or simply (Credits to zapl):

tobox.postDelayed(new Runnable(){ 
    public void run(){
        tobox.setText(meaning.replace("/", "\n"));
    }
}, 500); // 500 ms

This way the 2nd settext will be delayed and also ran in the UI thread.

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