java - 处理程序延迟不统一？

Question

我有这段代码运行延迟:

    final Handler handler = new Handler();
    final int delay = 1000; //milliseconds
    handler.postDelayed(new Runnable(){
        public void run(){
            handler.postDelayed(this, delay);
            Log.e("LOG","HIT");
        }
    }, delay);

并接收这些日志语句:

07-27 19:02:00.084 1690-1690/com.example.steinbockapplications.myapplication2 E/LOG: HIT
07-27 19:02:02.089 1690-1690/com.example.steinbockapplications.myapplication2 E/LOG: HIT
07-27 19:02:03.092 1690-1690/com.example.steinbockapplications.myapplication2 E/LOG: HIT
07-27 19:02:25.154 1690-1690/com.example.steinbockapplications.myapplication2 E/LOG: HIT
07-27 19:02:26.155 1690-1690/com.example.steinbockapplications.myapplication2 E/LOG: HIT

认为它应该每 1000 毫秒运行一次，那么这些延迟是怎么回事？

Answer 1

你好@Johnny Rockex，我运行了相同的代码，稍作修改。

07-27 22:50:19.999 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:21.000 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:22.001 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:23.002 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:24.003 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:25.005 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:26.006 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:27.007 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:28.008 18973-18973/com.jingged.mermaids E/LOG: HIT
07-27 22:50:29.009 18973-18973/com.jingged.mermaids E/LOG: HIT

代码

final Handler handler = new Handler();
    final int delay = 1000; //milliseconds
    handler.postDelayed(new Runnable(){
        public void run(){
            Log.e("LOG","HIT");
            handler.postDelayed(this, delay);
        }
    }, delay);

实际上你是在日志方法之前延迟它。这应该是运行方法下的处理程序中的最后一行。