TextView setText 在 ScheduledExecutorService runOnUiThread 中不起作用

Question

代码 ：

private void startTimer() {
    final ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(1);
    scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                public void run() {
                    int count = 60;
                    time.setText(count - 1 + "");
                    count--;
                }
            });
        }
    }, 0 , 1000, TimeUnit.MILLISECONDS);
}

我想每 1 秒更新一次 TextView 中的文本，但这似乎只适用于第一次，以后的文本不会更新。

有人知道是什么问题吗？？

Answer 1

int count = 60;
private void startTimer() {
final ScheduledExecutorService scheduleTaskExecutor = Executors.newScheduledThreadPool(1);
scheduleTaskExecutor.scheduleAtFixedRate(new Runnable() {
    @Override
    public void run() {
       runOnUiThread(new Runnable() {
          public void run() {
             if(count > 0){
               time.setText(count - 1 + "");
               count--;
             }
          }
       });
     }
   }, 0 , 1000, TimeUnit.MILLISECONDS);
}