Question

我在Eclipse中为我的Android应用程序使用scheduleAtFixedRate-timer，但它不起作用：

Timer t = new Timer();
t.scheduleAtFixedRate(task, (long) 0, (long) interval*1000);

其中interval可以是0.5。但是，这有效：

    Timer t = new Timer();
    t.scheduleAtFixedRate(task, (long) 0, (long) 500);

计划定时器也有效：

    Timer t = new Timer();
    t.schedule(task, (long) interval*1000);

我认为这很奇怪，并且不知道为什么模拟器会给出一个非法的例子。有人可以帮助我吗？

编辑：堆栈跟踪

03-20 12:29:54.080: E/AndroidRuntime(855): FATAL EXCEPTION: main
03-20 12:29:54.080: E/AndroidRuntime(855): Process: com.example.bulerias, PID: 855
03-20 12:29:54.080: E/AndroidRuntime(855): java.lang.IllegalArgumentException
03-20 12:29:54.080: E/AndroidRuntime(855):  at java.util.Timer.scheduleAtFixedRate(Timer.java:526)
03-20 12:29:54.080: E/AndroidRuntime(855):  at com.example.bulerias.MainActivity$1.onClick(MainActivity.java:92)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.view.View.performClick(View.java:4424)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.view.View$PerformClick.run(View.java:18383)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.os.Handler.handleCallback(Handler.java:733)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.os.Handler.dispatchMessage(Handler.java:95)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.os.Looper.loop(Looper.java:137)
03-20 12:29:54.080: E/AndroidRuntime(855):  at android.app.ActivityThread.main(ActivityThread.java:4998)
03-20 12:29:54.080: E/AndroidRuntime(855):  at java.lang.reflect.Method.invokeNative(Native Method)
03-20 12:29:54.080: E/AndroidRuntime(855):  at java.lang.reflect.Method.invoke(Method.java:515)
03-20 12:29:54.080: E/AndroidRuntime(855):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
03-20 12:29:54.080: E/AndroidRuntime(855):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
03-20 12:29:54.080: E/AndroidRuntime(855):  at dalvik.system.NativeStart.main(Native Method)

Answer 1

根据文档here，IllegalArgumentException或delay < 0中period <= 0或scheduleAtFixedRate会引发period == 0。因此，我假设：Timer t = new Timer(); long period = (long) interval*1000; Log.i("sometag", "period = " period); t.scheduleAtFixedRate(task, (long) 0, period);。
您应该检查您的期间以确保它不是0：

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scheduleAtFixedRate-timer不起作用（Eclipse中的Android）

1 个答案: