Runnable

public interface Runnable

java.lang.Runnable

Known indirect subclasses

AnimationDrawable, CookieSyncManager, ForkJoinWorkerThread, FutureTask<V>, HandlerThread, RenderScript.RSErrorHandler, RenderScript.RSMessageHandler, RunnableFuture<V>, RunnableScheduledFuture<V>, Thread, TimerTask

AnimationDrawable	An object used to create frame-by-frame animations, defined by a series of Drawable objects, which can be used as a View object's background.
CookieSyncManager	This class was deprecated in API level 21. The WebView now automatically syncs cookies as necessary. You no longer need to create or use the CookieSyncManager. To manually force a sync you can use the CookieManager method `CookieManager#flush` which is a synchronous replacement for `sync()`.
ForkJoinWorkerThread	A thread managed by a `ForkJoinPool`, which executes `ForkJoinTask`s.
FutureTask<V>	A cancellable asynchronous computation.
HandlerThread	A `Thread` that has a `Looper`.
RenderScript.RSErrorHandler	The runtime error handler base class.
RenderScript.RSMessageHandler	The base class from which an application should derive in order to receive RS messages from scripts.
RunnableFuture<V>	A `Future` that is `Runnable`.
RunnableScheduledFuture<V>	A `ScheduledFuture` that is `Runnable`.
Thread	A thread is a thread of execution in a program.
TimerTask	A task that can be scheduled for one-time or repeated execution by a `Timer`.

The Runnable interface should be implemented by any class whose instances are intended to be executed by a thread. The class must define a method of no arguments called run.

This interface is designed to provide a common protocol for objects that wish to execute code while they are active. For example, Runnable is implemented by class Thread. Being active simply means that a thread has been started and has not yet been stopped.

In addition, Runnable provides the means for a class to be active while not subclassing Thread. A class that implements Runnable can run without subclassing Thread by instantiating a Thread instance and passing itself in as the target. In most cases, the Runnable interface should be used if you are only planning to override the run() method and no other Thread methods. This is important because classes should not be subclassed unless the programmer intends on modifying or enhancing the fundamental behavior of the class.

See also:

Thread
Callable

Summary

Public methods
`abstract void`	`run()` When an object implementing interface `Runnable` is used to create a thread, starting the thread causes the object's `run` method to be called in that separately executing thread.

Public methods

run

Added in API level 1

public abstract void run ()

When an object implementing interface Runnable is used to create a thread, starting the thread causes the object's run method to be called in that separately executing thread.

The general contract of the method run is that it may take any action whatsoever.

See also:

Thread.run()