Java 如何";“等等”;安卓系统中的线程
在这里,我想每隔一秒钟调用“Log.d”和“postInvalidate”。但当我从LogCat检查它时,它似乎比我希望的运行得更快。为什么这个循环不等待1000毫秒呢 以下是LogCat中的输出。所以你可以看到它一秒钟都没有睡觉。我也用了Thread.sleep(在你建议之后) 这是最新的代码Java 如何";“等等”;安卓系统中的线程,java,android,multithreading,Java,Android,Multithreading,在这里,我想每隔一秒钟调用“Log.d”和“postInvalidate”。但当我从LogCat检查它时,它似乎比我希望的运行得更快。为什么这个循环不等待1000毫秒呢 以下是LogCat中的输出。所以你可以看到它一秒钟都没有睡觉。我也用了Thread.sleep(在你建议之后) 这是最新的代码gameOn是一个布尔值,现在它是真的 05-27 11:40:10.060: DEBUG/NOPSA-P(4546): 1306496408950 1306496387535 05-27 11:40:1
gameOn
是一个布尔值,现在它是真的
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
输出是
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();
}
}
您需要线程类的方法
公共静态无效睡眠(长时间)
使发送此消息的线程在给定的时间间隔(以毫秒为单位)内休眠。精度无法保证-线程可能会比要求的睡眠时间长或短
参数
time
以毫秒为单位的睡眠时间
不要使用wait()
,使用android.os.SystemClock.sleep(1000)代码>或线程睡眠(1000)代码>
它们之间的主要区别在于Thread.sleep()
可以很早中断——你会被告知,但这还不是整秒钟。android.os的调用不会早起。WriteThread.sleep(1000)代码>它将使线程睡眠1000毫秒我只需按下面显示的方式添加这一行(如果需要第二次延迟):
我发现这个问题是必要的(你的应用程序可能会因为Android操作系统和你自己的代码而崩溃)。你可以试试这个,它很短:)
它将睡眠7秒
看看输出也与您的日志语句不一致,因为第一列既不是固定的(我认为应该是固定的,因为您的代码被截断了--d永远不会更新),也不是严格增加的。左边的时间戳与你的想法一致——你一秒钟也没睡好。你能在这篇文章中更新你的代码吗?@dinesh707:你多次调用startGameTimeElapseThread()
方法,每次调用都会创建一个线程。只需调用一次即可。@dinesh707:可能会记录Thread.currentThread().getName()
输出并验证您自己。
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();
}
}
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
try {
Thread.sleep(1000);
} catch(InterruptedException e) {
// Process exception
}
SystemClock.sleep(7000);