java - 如何在 Android 中 "wait"线程

标签 java android multithreading 

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();
}

在这里，我想每隔一秒调用一次“Log.d”和“postInvalidate”。但是当我从 LogCat 检查它时，它似乎循环运行得比我想要的要快。为什么这个循环不等待 1000 毫秒？

以下是 LogCat 中的输出。所以你可以看到它根本没有睡一秒钟。我也使用了 Thread.sleep (在你建议之后)

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 boolean 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

最佳答案

您需要 sleep Thread 类的方法。

public static void sleep (long time)

Causes the thread which sent this message to sleep for the given interval of time (given in milliseconds). The precision is not guaranteed - the Thread may sleep more or less than requested.

Parameters

time The time to sleep in milliseconds.

关于java - 如何在 Android 中 "wait"线程，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6151566/

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