如何在Android中“等待”一个线程

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中检查它似乎循环运行速度比我想要的。 为什么这个循环只是等待1000毫秒？

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（build议之后）

 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 

Answer 1

你需要Thread类的sleep方法。

public static void sleep (long time)

使发送此消息的线程在给定的时间间隔（以毫秒为单位）hibernate。 精度不能保证 – 线程可能会比请求更多或更less。

参数

time以毫秒为单位的睡眠时间。

Answer 2

不要使用wait（），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，但是它还不是完整的秒钟。 android.os调用不会提前醒来。

Answer 3

我只是按照下面的内容添加这一行（如果需要第二次延迟）：

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

我觉得抓住是必要的。

Answer 4

你可以试试这个简短的:)

 SystemClock.sleep(7000); 

它会睡7秒看文档

Answer 5

写入Thread.sleep(1000); 它会使线程睡眠1000毫秒