Android APIs
public final class

FileDescriptor

extends Object
java.lang.Object
   ↳ java.io.FileDescriptor

Class Overview

Wraps a Unix file descriptor. It's possible to get the file descriptor used by some classes (such as FileInputStream, FileOutputStream, and RandomAccessFile), and then create new streams that point to the same file descriptor.

Summary

Fields
public static final FileDescriptor err Corresponds to stderr.
public static final FileDescriptor in Corresponds to stdin.
public static final FileDescriptor out Corresponds to stdout.
Public Constructors
FileDescriptor()
Constructs a new invalid FileDescriptor.
Public Methods
void sync()
Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.
String toString()
Returns a string containing a concise, human-readable description of this object.
boolean valid()
Tests whether this FileDescriptor is valid.
[Expand]
Inherited Methods
From class java.lang.Object

Fields

public static final FileDescriptor err

Added in API level 1

Corresponds to stderr.

public static final FileDescriptor in

Added in API level 1

Corresponds to stdin.

public static final FileDescriptor out

Added in API level 1

Corresponds to stdout.

Public Constructors

public FileDescriptor ()

Added in API level 1

Constructs a new invalid FileDescriptor.

Public Methods

public void sync ()

Added in API level 1

Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.

Throws
SyncFailedException

public String toString ()

Added in API level 1

Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:

   getClass().getName() + '@' + Integer.toHexString(hashCode())

See Writing a useful toString method if you intend implementing your own toString method.

Returns
String a printable representation of this object.

public boolean valid ()

Added in API level 1

Tests whether this FileDescriptor is valid.

Returns
boolean