다음을 통해 공유


IScheduledExecutorService.ScheduleAtFixedRate Method

Definition

Submits a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is, executions will commence after initialDelay, then initialDelay + period, then initialDelay + 2 * period, and so on.

[Android.Runtime.Register("scheduleAtFixedRate", "(Ljava/lang/Runnable;JJLjava/util/concurrent/TimeUnit;)Ljava/util/concurrent/ScheduledFuture;", "GetScheduleAtFixedRate_Ljava_lang_Runnable_JJLjava_util_concurrent_TimeUnit_Handler:Java.Util.Concurrent.IScheduledExecutorServiceInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")]
public Java.Util.Concurrent.IScheduledFuture? ScheduleAtFixedRate (Java.Lang.IRunnable? command, long initialDelay, long period, Java.Util.Concurrent.TimeUnit? unit);
[<Android.Runtime.Register("scheduleAtFixedRate", "(Ljava/lang/Runnable;JJLjava/util/concurrent/TimeUnit;)Ljava/util/concurrent/ScheduledFuture;", "GetScheduleAtFixedRate_Ljava_lang_Runnable_JJLjava_util_concurrent_TimeUnit_Handler:Java.Util.Concurrent.IScheduledExecutorServiceInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")>]
abstract member ScheduleAtFixedRate : Java.Lang.IRunnable * int64 * int64 * Java.Util.Concurrent.TimeUnit -> Java.Util.Concurrent.IScheduledFuture

Parameters

command
IRunnable

the task to execute

initialDelay
Int64

the time to delay first execution

period
Int64

the period between successive executions

unit
TimeUnit

the time unit of the initialDelay and period parameters

Returns

a ScheduledFuture representing pending completion of the series of repeated tasks. The future's Future#get() get() method will never return normally, and will throw an exception upon task cancellation or abnormal termination of a task execution.

Attributes

Exceptions

if the task cannot be scheduled for execution

if command is null

if period less than or equal to zero

Remarks

Submits a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is, executions will commence after initialDelay, then initialDelay + period, then initialDelay + 2 * period, and so on.

The sequence of task executions continues indefinitely until one of the following exceptional completions occur: <ul> <li>The task is Future#cancel explicitly cancelled via the returned future. <li>The executor terminates, also resulting in task cancellation. <li>An execution of the task throws an exception. In this case calling Future#get() get on the returned future will throw ExecutionException, holding the exception as its cause. </ul> Subsequent executions are suppressed. Subsequent calls to Future#isDone isDone() on the returned future will return true.

If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

Java documentation for java.util.concurrent.ScheduledExecutorService.scheduleAtFixedRate(java.lang.Runnable, long, long, java.util.concurrent.TimeUnit).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to