Android 在后台运行服务时出现意外行为

在我的应用程序中，我有一个服务。它在主活动启动时启动，并执行以下操作：

timer.scheduleAtFixedRate (
    new TimerTask() {
        public void run() {
            appendToFile("diff: "+(System.currentTimeMillis()-lastTime));
            lastTime = System.currentTimeMillis();
        }
    }, 0, 1);

基本上，它会创建一个

计时器，每毫秒更新一次。每次更新时，计时器都会查看上次调用它的时间，并保存计时器调用文件之间的时间间隔。由于系统中总是有开销，我希望每行输出都超过1ms，可能在10左右。
下面是应用程序睡眠时的快照

diff: 6
diff: 8
diff: 5
diff: 81
diff: 12
diff: 12
diff: 54
diff: 60
diff: 5734
diff: 77
diff: 9
diff: 20
diff: 6
diff: 21
diff: 10
diff: 13
diff: 16895
diff: 13
diff: 82
diff: 269
diff: 35
diff: 25
diff: 24
diff: 20
diff: 30
diff: 26
diff: 11
diff: 14
diff: 49
diff: 57
diff: 9

我的问题是关于我有时会得到一些奇怪的结果。中间16895表示当系统空闲时，出于某种原因的服务几乎等待17秒来运行它的任务。然而，紧接着，它显示了10到30毫秒之间更正常的结果。我知道这是在系统睡眠期间，因为日志中有更多的条目。该服务从未被破坏，因为我还记录了对
onDestroy（）的所有调用

有没有解释为什么服务会突然暂停？有什么方法可以确保它一直运行吗？
就像你说的，系统正在休眠。当服务从内存中取出时，服务将被“销毁”。休眠系统只是暂时的暂停，因为一旦CPU唤醒，它就会恢复

您可以通过使用来唤醒系统，它将计划在特定时间发生偶数。它会唤醒系统。您还可以使用来保持CPU运行

请注意，保持CPU运行会消耗大量电池，因此只有在您绝对需要的时候才可以节约使用它。
所以它在没有调用onDestroy（）的情况下被销毁了？是否有其他方法可以监听系统以捕获“暂停”事件？由于我有一个很短的延迟，在这种情况下使用AlarmManager不会很好地工作。您必须手动注册SCREEN_OFF和SCREEN_ON广播服务，但在SCREEN_OFF广播中启动AlarmManager并在SCREEN_ON广播中取消它。其他参考资料：