android - 如何实现 100 毫秒休眠的重试机制

Question

我想在几毫秒后执行这条指令。

我怎样才能做到这一点？

try {
   // Get the typeface  
   MyApp.appTypeFace = Typeface.createFromAsset(getApplication().getAssets(),
         MyApp.fontName);
   Log.d("font","in try="+MyApp.fontName);
   Log.d("font","type face="+MyApp.appTypeFace);
} 

Answer 1

我会使用Handler来发布 Runnable，如下所示：

private Runnable task = new Runnable() { 
    public void run() {
        // Execute your delayed code
    }
};

...

Handler handler = new Handler();
int millisDelay = 100;
handler.postDelayed(task, millisDelay);

代码将在postDelayed调用后 100 毫秒执行。

Answer 2

Handler handler;

        handler=new Handler();
        Runnable notification = new Runnable() {
            @Override
            public void run() {
                MyApp.appTypeFace = Typeface.createFromAsset(getApplication().getAssets(),
         MyApp.fontName);
   Log.d("font","in try="+MyApp.fontName);
   Log.d("font","type face="+MyApp.appTypeFace);

            }
        };
        handler.postDelayed(notification,100);

Answer 3

我通常使用CountDownTimer：

http://developer.android.com/reference/android/os/CountDownTimer.html

CountDownTimer timer = new CountDownTimer(100, 100) {

     public void onTick(long millisUntilFinished) {

     }

     public void onFinish() {
         //retry
         //restart with timer.start();
     }
  }.start();

但是有很多选择：AsyncTask、Threads、Runnable。

例如：

重复一个有时间延迟的任务？