Android APIs
public interface

Channel

implements Closeable
java.nio.channels.Channel
Known Indirect Subclasses

Class Overview

A channel is a conduit to I/O services covering such items as files, sockets, hardware devices, I/O ports or some software component.

Channels are open upon creation, and can be closed explicitly. Once a channel is closed it cannot be re-opened, and any attempts to perform I/O operations on the closed channel result in a ClosedChannelException.

Particular implementations or sub-interfaces of Channel dictate whether they are thread-safe or not.

Summary

Public Methods
abstract void close()
Closes an open channel.
abstract boolean isOpen()
Returns true if this channel is open.
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Inherited Methods
From interface java.io.Closeable
From interface java.lang.AutoCloseable

Public Methods

public abstract void close ()

Added in API level 1

Closes an open channel. If the channel is already closed then this method has no effect. If there is a problem with closing the channel then the method throws an IOException and the exception contains reasons for the failure.

If an attempt is made to perform an operation on a closed channel then a ClosedChannelException will be thrown on that attempt.

If multiple threads attempt to simultaneously close a channel, then only one thread will run the closure code, and others will be blocked until the first returns.

Throws
IOException if a problem occurs closing the channel.

public abstract boolean isOpen ()

Added in API level 1

Returns true if this channel is open.

Returns
boolean