ScheduledThreadPoolExecutor

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ScheduledThreadPoolExecutor
java.util.concurrent
类ScheduledThreadPoolExecutor
java.lang.Object
继承者java.util.concurrent.AbstractExecutorService
继承者java.util.concurrent.ThreadPoolExecutor
继承者java.util.concurrent.ScheduledThreadPoolExecutor

所有已实现的接口：
Executor,ExecutorService,ScheduledExecutorService
和ThreadPoolExecutor相比，ScheduledThreadPoolExecutor它可另行安排在给定的延迟后运行命令，或者定期执行命令。 需要多线程时，或者要求ThreadPoolExecutor具有额外的灵活性或功能时，此类要优于Timer。 一旦启用已延迟的任务就执行它，但是有关何时启用，启用后何时执行则没有任何实时保证。 按照提交的先进先出(FIFO)顺序来启用那些被安排在同一执行时间的任务。 虽然此类继承自ThreadPoolExecutor，但是几个继承的调整方法对此类并无作用。 特别是，因为它作为一个使用固定 corePoolSize线程和一个无界队列的固定大小的池，所以调整maximumPoolSize没有什么效果。 注意1："一旦启用已延迟的任务就执行它，但是有关何时启用，启用后何时执行则没有任何实时保证",即没实时性保证。 注意2:注意"因为它作为一个使用corePoolSize线程和一个无界队列的固定大小的池，所以调整maximumPoolSize没有什么效果",就是说他只有core线程，maximumPoolSize当然没有作用。它为什么这样做呢？ 扩展注意事项：此类重写AbstractExecutorService的submit方法，以生成内部对象控制每个任务的延迟和调度。 若要保留功能性，子类中任何进一步重写的这些方法都必须调用超类版本，超类版本有效地禁用附加任务的定制。 但是，此类提供替代受保护的扩展方法decorateTask方法（为Runnable和Callable各提供一种版本），可定制用于通过execute、submit、schedule、scheduleAtFixedRate和scheduleWithFixedDelay进入的执行命令的具体任务类型。默认情况下，ScheduledThreadPoolExecutor使用一个扩展FutureTask的任务类型。但是，可以使用下列形式的子类修改或替换该类型。 <pre class="prettyprint" style="line-height:inherit; padding-top:10px; padding-right:10px; padding-bottom:10px; padding-left:10px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); color:rgb(0,112,0); font-family:monospace; background-color:rgb(250,250,250); margin-top:0px; margin-bottom:1em; margin-left:1em; overflow-x:auto; overflow-y:auto"><code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">public class CustomScheduledExecutor extends ScheduledThreadPoolExecutor { static class CustomTask implements RunnableScheduledFuture { ... </code> protected RunnableScheduledFuture decorateTask( Runnable r, RunnableScheduledFuture task) { return new CustomTask(r, task); } protected RunnableScheduledFuture decorateTask( Callable c, RunnableScheduledFuture task) { return new CustomTask(c, task); } // ... add constructors, etc. }}</pre> <div style="line-height:25px">构造函数</div> Public Constructors

<nobr style="line-height:21px"></nobr>	<nobr style="line-height:21px"><span style="line-height:21px; margin-right:2px"><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#ScheduledThreadPoolExecutor(int)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledThreadPoolExecutor</a></span>(int corePoolSize)</nobr> Creates a new`ScheduledThreadPoolExecutor`with the given core pool size.
<nobr style="line-height:21px"></nobr>	<nobr style="line-height:21px"><span style="line-height:21px; margin-right:2px"><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#ScheduledThreadPoolExecutor(int,%20java.util.concurrent.ThreadFactory)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledThreadPoolExecutor</a></span>(int corePoolSize,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ThreadFactory.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ThreadFactory</a>threadFactory)</nobr> Creates a new`ScheduledThreadPoolExecutor`with the given initial parameters.
<nobr style="line-height:21px"></nobr>	<nobr style="line-height:21px"><span style="line-height:21px; margin-right:2px"><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#ScheduledThreadPoolExecutor(int,%20java.util.concurrent.RejectedExecutionHandler)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledThreadPoolExecutor</a></span>(int corePoolSize,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RejectedExecutionHandler.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RejectedExecutionHandler</a>handler)</nobr> Creates a new ScheduledThreadPoolExecutor with the given initial parameters.
<nobr style="line-height:21px"></nobr>	<nobr style="line-height:21px"><span style="line-height:21px; margin-right:2px"><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#ScheduledThreadPoolExecutor(int,%20java.util.concurrent.ThreadFactory,%20java.util.concurrent.RejectedExecutionHandler)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledThreadPoolExecutor</a></span>(int corePoolSize,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ThreadFactory.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ThreadFactory</a>threadFactory,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RejectedExecutionHandler.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RejectedExecutionHandler</a>handler)</nobr> Creates a new ScheduledThreadPoolExecutor with the given initial parameters.

主要函数： <div style="line-height:25px"> <table id="pubmethods" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:1em; margin-left:1em; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; font-size:0.9em; border-collapse:collapse; empty-cells:show; width:933px"><tbody style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <th colspan="12" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:rgb(222,232,241)"> Public Methods</th> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> void </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#execute(java.lang.Runnable)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">execute</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>command)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Executes<code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">command</code>with zero required delay.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> boolean </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#getContinueExistingPeriodicTasksAfterShutdownPolicy()" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">getContinueExistingPeriodicTasksAfterShutdownPolicy</a>()<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Gets the policy on whether to continue executing existing periodic tasks even when this executor has been<code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">shutdown</code>.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 获取有关在此执行程序已shutdown 的情况下、是否继续执行现有定期任务的策略。</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> boolean </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#getExecuteExistingDelayedTasksAfterShutdownPolicy()" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">getExecuteExistingDelayedTasksAfterShutdownPolicy</a>()<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Gets the policy on whether to execute existing delayed tasks even when this executor has been<code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">shutdown</code>.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 获取有关在此执行程序已 shutdown 的情况下是否继续执行现有延迟任务的策略。</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/BlockingQueue.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">BlockingQueue</a><<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#getQueue()" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">getQueue</a>()<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Returns the task queue used by this executor.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledFuture</a><?> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#schedule(java.lang.Runnable,%20long,%20java.util.concurrent.TimeUnit)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">schedule</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>command, long delay,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/TimeUnit.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">TimeUnit</a>unit)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Creates and executes a one-shot action that becomes enabled after the given delay.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <V><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledFuture</a><V> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#schedule(java.util.concurrent.Callable<V>,%20long,%20java.util.concurrent.TimeUnit)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">schedule</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Callable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Callable</a><V> callable, long delay,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/TimeUnit.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">TimeUnit</a>unit)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Creates and executes a ScheduledFuture that becomes enabled after the given delay.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledFuture</a><?> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#scheduleAtFixedRate(java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">scheduleAtFixedRate</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>command, long initialDelay, long period,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/TimeUnit.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">TimeUnit</a>unit)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; that is executions will commence after<tt style="line-height:21px">initialDelay</tt>then<tt style="line-height:21px">initialDelay+period</tt>, then<tt style="line-height:21px">initialDelay + 2 * period</tt>, and so on.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">ScheduledFuture</a><?> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#scheduleWithFixedDelay(java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">scheduleWithFixedDelay</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>command, long initialDelay, long delay,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/TimeUnit.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">TimeUnit</a>unit)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> void </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#setContinueExistingPeriodicTasksAfterShutdownPolicy(boolean)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">setContinueExistingPeriodicTasksAfterShutdownPolicy</a>(boolean value)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Sets the policy on whether to continue executing existing periodic tasks even when this executor has been<code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">shutdown</code>.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 设置有关在此执行程序已 shutdown 的情况下是否继续执行现有定期任务的策略。</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> void </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#setExecuteExistingDelayedTasksAfterShutdownPolicy(boolean)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">setExecuteExistingDelayedTasksAfterShutdownPolicy</a>(boolean value)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Sets the policy on whether to execute existing delayed tasks even when this executor has been<code style="line-height:1em; color:rgb(0,112,0); font-family:monospace">shutdown</code>.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 设置有关在此执行程序已 shutdown 的情况下是否继续执行现有延迟任务的策略。</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> void </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#shutdown()" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">shutdown</a>()<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Initiates an orderly shutdown in which previously submitted tasks are executed, but no new tasks will be accepted.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/List.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">List</a><<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#shutdownNow()" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">shutdownNow</a>()<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Attempts to stop all actively executing tasks, halts the processing of waiting tasks, and returns a list of the tasks that were awaiting execution.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <T><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Future.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Future</a><T> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#submit(java.lang.Runnable,%20T)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">submit</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>task, T result)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Submits a Runnable task for execution and returns a Future representing that task.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <T><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Future.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Future</a><T> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#submit(java.util.concurrent.Callable<T>)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">submit</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Callable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Callable</a><T> task)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Submits a value-returning task for execution and returns a Future representing the pending results of the task.</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Future.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Future</a><?> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#submit(java.lang.Runnable)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">submit</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>task)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Submits a Runnable task for execution and returns a Future representing that task.</div> </td> </tr> </tbody></table> <table id="promethods" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:1em; margin-left:1em; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; font-size:0.9em; border-collapse:collapse; empty-cells:show; width:933px"><tbody style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <th colspan="12" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:rgb(222,232,241)"> Protected Methods</th> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; background-color:rgb(246,246,246)"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <V><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RunnableScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RunnableScheduledFuture</a><V> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#decorateTask(java.lang.Runnable,%20java.util.concurrent.RunnableScheduledFuture<V>)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">decorateTask</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/lang/Runnable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Runnable</a>runnable,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RunnableScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RunnableScheduledFuture</a><V> task)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Modifies or replaces the task used to execute a runnable.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 重写该函数来，以用个性化的RunnableScheduledFuture来包装runnable任务,task是ScheduledThreadPoolExecutor提供默认的默认的对runnable的RunnableSheduledFuture包装，即ScheduledFutureTask对象。</div> </td> </tr> <tr style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial"> <td style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:right; vertical-align:top; background-color:inherit"> <V><a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RunnableScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RunnableScheduledFuture</a><V> </td> <td width="100%" style="line-height:21px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:6px; padding-right:12px; padding-bottom:6px; padding-left:12px; border-top-width:1px; border-right-width:1px; border-bottom-width:1px; border-left-width:1px; border-style:initial; border-color:initial; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-left-style:solid; border-top-color:rgb(204,204,204); border-right-color:rgb(204,204,204); border-bottom-color:rgb(204,204,204); border-left-color:rgb(204,204,204); text-align:left; vertical-align:top; background-color:inherit"> <a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/ScheduledThreadPoolExecutor.html#decorateTask(java.util.concurrent.Callable<V>,%20java.util.concurrent.RunnableScheduledFuture<V>)" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">decorateTask</a>(<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/Callable.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">Callable</a><V> callable,<a rel="nofollow" href="http://developer.android.com/reference/java/util/concurrent/RunnableScheduledFuture.html" style="color:rgb(0,102,153); line-height:21px; text-decoration:none">RunnableScheduledFuture</a><V> task)<div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> Modifies or replaces the task used to execute a callable.</div> <div style="line-height:25px; margin-top:0px; margin-right:0px; margin-bottom:0px; margin-left:0px; padding-top:3px; padding-right:1em; padding-bottom:0px; padding-left:1em; border-top-width:0px; border-right-width:0px; border-bottom-width:0px; border-left-width:0px; border-style:initial; border-color:initial; border-style:initial; border-color:initial"> 重写该函数来，以用个性化的RunnableScheduledFuture来包装callable任务,task是ScheduledThreadPoolExecutor提供默认的默认的对callable的RunnableSheduledFuture包装，即ScheduledFutureTask对象。</div> </td> </tr> </tbody></table> 更多内容请参考《<a title="阅读全文" target="_blank" href="http://hubingforever.blog.163.com/blog/static/1710405792010964339151/" style="color:rgb(207,121,28); line-height:25px; text-decoration:none">ThreadPoolExecutor</a>》和《<a title="阅读全文" target="_blank" href="http://hubingforever.blog.163.com/blog/static/17104057920109544814639/" style="color:rgb(207,121,28); line-height:25px; text-decoration:none">ScheduledExecutorService</a>》 Timer与ScheduledThreadPoolExecutor的区别： Timer对调度的支持是基于绝对时间的，因此任务对系统时间的改变是敏感的；而ScheduledThreadPoolExecutor支持相对时间。 Timer使用单线程方式来执行所有的TimerTask，如果某个TimerTask很耗时则会影响到其他TimerTask的执行； 而ScheduledThreadPoolExecutor则可以构造一个固定大小的线程池来执行任务。 Timer不会捕获由TimerTask抛出的未检查异常，故当有异常抛出时，Timer会终止，导致未执行完的TimerTask不再执行，新的TimerTask也不能被调度； ScheduledThreadPoolExecutor对这个问题进行了妥善的处理，不会影响其他任务的执行。 </div>

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