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如何“等待”Android中的线程

2011-05-27 33 views
40 
private void startGameTimeElapseThread(){ 
    new Thread(new Runnable() { 
     Date d = new Date(); 
     public void run() { 
      while (gameOn){ 
       Log.d(TAG,""+d.getTime()+" "+gameStatus.getLastTimeUpdated()); 

       postInvalidate(795, 150, 1024, 300); 
       try { 
        synchronized (this) { 
         wait(1000); 
        } 
       } catch (InterruptedException e) { 
        // TODO Auto-generated catch block 
        Log.d(TAG, "Waiting didnt work!!"); 
        e.printStackTrace(); 
       } 
      } 
     } 
    }).start(); 
}

这里我想每秒调用一次“Log.d”和“postInvalidate”。但是当我从LogCat中检查它看来循环运行速度比我想要的要快。为什么这个循环只是等待1000毫秒？如何“等待”Android中的线程

以下是LogCat中的输出。所以你可以看到它不睡一秒钟。我也使用Thread.sleep（建议后）

05-27 11:40:10.060: DEBUG/NOPSA-P(4546): 1306496408950 1306496387535 
05-27 11:40:10.070: DEBUG/NOPSA-P(4546): 1306496410037 1306496387535 
05-27 11:40:10.232: DEBUG/NOPSA-P(4546): 1306496410201 1306496387535 
05-27 11:40:10.250: DEBUG/NOPSA-P(4546): 1306496408214 1306496387535 
05-27 11:40:10.310: DEBUG/NOPSA-P(4546): 1306496405988 1306496387535 
05-27 11:40:10.361: DEBUG/NOPSA-P(4546): 1306496409327 1306496387535 
05-27 11:40:10.431: DEBUG/NOPSA-P(4546): 1306496410398 1306496387535 
05-27 11:40:10.521: DEBUG/NOPSA-P(4546): 1306496409478 1306496387535 
05-27 11:40:10.593: DEBUG/NOPSA-P(4546): 1306496410566 1306496387535 
05-27 11:40:11.230: DEBUG/NOPSA-P(4546): 1306496409678 1306496387535 
05-27 11:40:11.230: DEBUG/NOPSA-P(4546): 1306496410201 1306496387535 
05-27 11:40:11.241: DEBUG/NOPSA-P(4546): 1306496409878 1306496387535 
05-27 11:40:11.241: DEBUG/NOPSA-P(4546): 1306496410037 1306496387535 
05-27 11:40:11.241: DEBUG/NOPSA-P(4546): 1306496408950 1306496387535 
05-27 11:40:11.260: DEBUG/NOPSA-P(4546): 1306496408214 1306496387535 
05-27 11:40:11.314: DEBUG/NOPSA-P(4546): 1306496405988 1306496387535 
05-27 11:40:11.314: DEBUG/NOPSA-P(4546): 1306496411254 1306496387535 
05-27 11:40:11.361: DEBUG/NOPSA-P(4546): 1306496409327 1306496387535 
05-27 11:40:11.431: DEBUG/NOPSA-P(4546): 1306496410398 1306496387535 
05-27 11:40:11.520: DEBUG/NOPSA-P(4546): 1306496409478 1306496387535 
05-27 11:40:11.551: DEBUG/NOPSA-P(4546): 1306496411508 1306496387535 
05-27 11:40:11.712: DEBUG/NOPSA-P(4546): 1306496410566 1306496387535 
05-27 11:40:11.881: DEBUG/NOPSA-P(4546): 1306496411865 1306496387535 
05-27 11:40:12.051: DEBUG/NOPSA-P(4546): 1306496412025 1306496387535 
05-27 11:40:12.211: DEBUG/NOPSA-P(4546): 1306496412198 1306496387535 
05-27 11:40:12.231: DEBUG/NOPSA-P(4546): 1306496409678 1306496387535 
05-27 11:40:12.242: DEBUG/NOPSA-P(4546): 1306496410201 1306496387535 
05-27 11:40:12.251: DEBUG/NOPSA-P(4546): 1306496408950 1306496387535 
05-27 11:40:12.251: DEBUG/NOPSA-P(4546): 1306496409878 1306496387535 
05-27 11:40:12.251: DEBUG/NOPSA-P(4546): 1306496410037 1306496387535 
05-27 11:40:12.261: DEBUG/NOPSA-P(4546): 1306496408214 1306496387535 
05-27 11:40:12.311: DEBUG/NOPSA-P(4546): 1306496405988 1306496387535 
05-27 11:40:12.341: DEBUG/NOPSA-P(4546): 1306496411254 1306496387535 
05-27 11:40:12.371: DEBUG/NOPSA-P(4546): 1306496409327 1306496387535 
05-27 11:40:12.442: DEBUG/NOPSA-P(4546): 1306496410398 1306496387535 
05-27 11:40:12.471: DEBUG/NOPSA-P(4546): 1306496412431 1306496387535 
05-27 11:40:12.521: DEBUG/NOPSA-P(4546): 1306496409478 1306496387535 
05-27 11:40:12.553: DEBUG/NOPSA-P(4546): 1306496411508 1306496387535 
05-27 11:40:12.671: DEBUG/NOPSA-P(4546): 1306496412639 1306496387535 
05-27 11:40:12.711: DEBUG/NOPSA-P(4546): 1306496410566 1306496387535 
05-27 11:40:12.841: DEBUG/NOPSA-P(4546): 1306496412813 1306496387535 
05-27 11:40:12.891: DEBUG/NOPSA-P(4546): 1306496411865 1306496387535 
05-27 11:40:13.001: DEBUG/NOPSA-P(4546): 1306496412983 1306496387535 
05-27 11:40:13.051: DEBUG/NOPSA-P(4546): 1306496412025 1306496387535 
05-27 11:40:13.193: DEBUG/NOPSA-P(4546): 1306496413166 1306496387535 
05-27 11:40:13.231: DEBUG/NOPSA-P(4546): 1306496409678 1306496387535 
05-27 11:40:13.251: DEBUG/NOPSA-P(4546): 1306496410201 1306496387535 
05-27 11:40:13.251: DEBUG/NOPSA-P(4546): 1306496409878 1306496387535 
05-27 11:40:13.251: DEBUG/NOPSA-P(4546): 1306496410037 1306496387535 
05-27 11:40:13.251: DEBUG/NOPSA-P(4546): 1306496408950 1306496387535 
05-27 11:40:13.261: DEBUG/NOPSA-P(4546): 1306496408214 1306496387535 
05-27 11:40:13.271: DEBUG/NOPSA-P(4546): 1306496412198 1306496387535 
05-27 11:40:13.321: DEBUG/NOPSA-P(4546): 1306496405988 1306496387535 
05-27 11:40:13.341: DEBUG/NOPSA-P(4546): 1306496411254 1306496387535 
05-27 11:40:13.371: DEBUG/NOPSA-P(4546): 1306496409327 1306496387535 
05-27 11:40:13.431: DEBUG/NOPSA-P(4546): 1306496413405 1306496387535 
05-27 11:40:13.441: DEBUG/NOPSA-P(4546): 1306496410398 1306496387535 
05-27 11:40:13.481: DEBUG/NOPSA-P(4546): 1306496412431 1306496387535 
05-27 11:40:13.532: DEBUG/NOPSA-P(4546): 1306496409478 1306496387535

这是最新的代码。 gameOn是一个布尔值，现在它是真的。

private void startGameTimeElapseThread(){ 
    if (gameOn){ 
     new Thread(new Runnable() { 
      Date d = new Date(); 
      public void run() { 

        Log.d(TAG,""+d.getTime()+"ms "+d.getTime()/1000+"sec"); 
        postInvalidate(795, 150, 1024, 300); 
        android.os.SystemClock.sleep(1000); 
        startGameTimeElapseThread(); 

      } 
     }).start(); 
    } 
}

输出是

05-27 12:00:51.211: DEBUG/NOPSA-P(5098): 1306497650761ms 1306497650sec 
05-27 12:00:51.211: DEBUG/NOPSA-P(5098): 1306497650786ms 1306497650sec 
05-27 12:00:51.221: DEBUG/NOPSA-P(5098): 1306497650764ms 1306497650sec 
05-27 12:00:51.221: DEBUG/NOPSA-P(5098): 1306497650763ms 1306497650sec 
05-27 12:00:51.221: DEBUG/NOPSA-P(5098): 1306497650769ms 1306497650sec 
05-27 12:00:51.231: DEBUG/NOPSA-P(5098): 1306497650749ms 1306497650sec 
05-27 12:00:51.231: DEBUG/NOPSA-P(5098): 1306497650736ms 1306497650sec 
05-27 12:00:51.231: DEBUG/NOPSA-P(5098): 1306497650742ms 1306497650sec 
05-27 12:00:51.241: DEBUG/NOPSA-P(5098): 1306497650746ms 1306497650sec 
05-27 12:00:51.241: DEBUG/NOPSA-P(5098): 1306497650848ms 1306497650sec 
05-27 12:00:51.251: DEBUG/NOPSA-P(5098): 1306497650729ms 1306497650sec 
05-27 12:00:51.271: DEBUG/NOPSA-P(5098): 1306497650739ms 1306497650sec 
05-27 12:00:51.271: DEBUG/NOPSA-P(5098): 1306497650739ms 1306497650sec 
05-27 12:00:51.271: DEBUG/NOPSA-P(5098): 1306497650868ms 1306497650sec 
05-27 12:00:51.271: DEBUG/NOPSA-P(5098): 1306497650798ms 1306497650sec 
05-27 12:00:51.281: DEBUG/NOPSA-P(5098): 1306497650870ms 1306497650sec 
05-27 12:00:51.291: DEBUG/NOPSA-P(5098): 1306497651020ms 1306497651sec 
05-27 12:00:51.551: DEBUG/NOPSA-P(5098): 1306497651498ms 1306497651sec 
05-27 12:00:51.551: DEBUG/NOPSA-P(5098): 1306497651502ms 1306497651sec 
05-27 12:00:51.642: DEBUG/NOPSA-P(5098): 1306497651523ms 1306497651sec 
05-27 12:00:51.651: DEBUG/NOPSA-P(5098): 1306497651537ms 1306497651sec 
05-27 12:00:51.691: DEBUG/NOPSA-P(5098): 1306497651529ms 1306497651sec 
05-27 12:00:51.701: DEBUG/NOPSA-P(5098): 1306497651534ms 1306497651sec 
05-27 12:00:51.784: DEBUG/NOPSA-P(5098): 1306497651527ms 1306497651sec 
05-27 12:00:51.801: DEBUG/NOPSA-P(5098): 1306497651570ms 1306497651sec 
05-27 12:00:51.801: DEBUG/NOPSA-P(5098): 1306497651564ms 1306497651sec 
05-27 12:00:51.891: DEBUG/NOPSA-P(5098): 1306497651682ms 1306497651sec 
05-27 12:00:51.891: DEBUG/NOPSA-P(5098): 1306497651690ms 1306497651sec 
05-27 12:00:51.891: DEBUG/NOPSA-P(5098): 1306497651685ms 1306497651sec 
05-27 12:00:51.901: DEBUG/NOPSA-P(5098): 1306497651693ms 1306497651sec 
05-27 12:00:51.914: DEBUG/NOPSA-P(5098): 1306497651647ms 1306497651sec 
05-27 12:00:51.914: DEBUG/NOPSA-P(5098): 1306497651667ms 1306497651sec 
05-27 12:00:51.921: DEBUG/NOPSA-P(5098): 1306497651666ms 1306497651sec 
05-27 12:00:51.921: DEBUG/NOPSA-P(5098): 1306497651658ms 1306497651sec 
05-27 12:00:51.921: DEBUG/NOPSA-P(5098): 1306497651663ms 1306497651sec 
05-27 12:00:51.932: DEBUG/NOPSA-P(5098): 1306497651688ms 1306497651sec 
05-27 12:00:51.941: DEBUG/NOPSA-P(5098): 1306497651711ms 1306497651sec 
05-27 12:00:51.961: DEBUG/NOPSA-P(5098): 1306497651792ms 1306497651sec 
05-27 12:00:51.971: DEBUG/NOPSA-P(5098): 1306497651629ms 1306497651sec 
05-27 12:00:51.981: DEBUG/NOPSA-P(5098): 1306497651714ms 1306497651sec 
05-27 12:00:52.083: DEBUG/NOPSA-P(5098): 1306497652048ms 1306497652sec

来源

2011-05-27 dinesh707

回答

37

您需要Thread类的sleep方法。

public static void sleep (long time)

导致其中发送此消息睡给定的时间间隔（以毫秒为单位）的线程。不能保证精度 - 线程可能会比请求的多或少睡眠。

参数

time以毫秒为单位睡觉的时间。

来源

2011-05-27 11:27:48

+0

我加了一些输出，用于我的代码。您可以请检查一下:) – dinesh707 2011-05-27 11:43:36

+1

@ dinesh707：您多次调用'startGameTimeElapseThread（）'方法，每次调用都会创建一个线程。只是打电话一次，看看。 – 2011-05-27 11:57:47

+1

@ dinesh707：可能会记录'Thread.currentThread（）。getName（）'输出并验证自己。 – 2011-05-27 11:59:22

37

请勿使用wait（），请使用android.os.SystemClock.sleep(1000);或Thread.sleep(1000);。它们之间的主要区别是Thread.sleep（）可以被提前中断 - 你会被告知，但它仍然不是整秒。 android.os调用不会提前醒来。

来源

2011-05-27 11:29:14 mah

+1

我为我的代码添加了一些输出。你可以请检查一下:) – dinesh707 2011-05-27 11:43:30

+0

输出不与你的日志语句，因为第一列既不固定（因为我认为它应该是，因为你的代码剪切 - D从来没有更新），也不严格越来越多。左边的时间戳虽然与你同意 - 你还没睡一秒钟。你能在这篇文章中更新你的代码吗？ – mah 2011-05-27 11:54:45

+0

我更新了最新的代码。 – dinesh707 2011-05-27 12:03:45

1

写Thread.sleep(1000);它会为1000毫秒

来源

2011-05-27 11:36:19 Harinder

18

线程睡眠我刚加入这一行正是因为它显示如下（如果你需要一秒钟的延迟）：

try{ Thread.sleep(1000); }catch(InterruptedException e){ }

我觉得美中不足的是必要的。

来源

2012-05-21 08:07:34

6

你可以试试这个一个很短:)

​​

它会睡眠7秒 看看documentation

来源

2013-01-31 10:36:11

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