摘要：
TheTimerTaskclass represents a task to run at a specified time. The task may be run once or repeatedly.TimerTask代表了一个在特定时间运行的任务。该任务可能运行一次或多次。booleanca... 阅读全文
摘要：
Represents a command that can be executed. Often used to run code in a differentThread.代表一个可执行的命令。常用在一个不同的线程中运行代码。已知间接子类：AnimationDrawableCookieSyncMa... 阅读全文
摘要：
A cancellable asynchronous computation. This class provides a base implementation ofFuture, with methods to start and cancel a computation, query to s... 阅读全文