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UsbInterface

public class UsbInterface
extends Object implements Parcelable

java.lang.Object
   ↳ android.hardware.usb.UsbInterface


A class representing an interface on a UsbDevice. USB devices can have one or more interfaces, each one providing a different piece of functionality, separate from the other interfaces. An interface will have one or more UsbEndpoints, which are the channels by which the host transfers data with the device.

Developer Guides

For more information about communicating with USB hardware, read the USB developer guide.

Summary

Inherited constants

Fields

public static final Creator<UsbInterface> CREATOR

Public methods

int describeContents()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.

int getAlternateSetting()

Returns the interface's bAlternateSetting field.

UsbEndpoint getEndpoint(int index)

Returns the UsbEndpoint at the given index.

int getEndpointCount()

Returns the number of UsbEndpoints this interface contains.

int getId()

Returns the interface's bInterfaceNumber field.

int getInterfaceClass()

Returns the interface's class field.

int getInterfaceProtocol()

Returns the interface's protocol field.

int getInterfaceSubclass()

Returns the interface's subclass field.

String getName()

Returns the interface's name.

String toString()

Returns a string representation of the object.

void writeToParcel(Parcel parcel, int flags)

Flatten this object in to a Parcel.

Inherited methods

Fields

CREATOR

public static final Creator<UsbInterface> CREATOR

Public methods

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

getAlternateSetting

public int getAlternateSetting ()

Returns the interface's bAlternateSetting field. This is an integer that along with the ID uniquely identifies the interface on the device. UsbDeviceConnection#setInterface can be used to switch between two interfaces with the same ID but different alternate setting.

Returns
int the interface's alternate setting

getEndpoint

public UsbEndpoint getEndpoint (int index)

Returns the UsbEndpoint at the given index.

Parameters
index int

Returns
UsbEndpoint the endpoint

getEndpointCount

public int getEndpointCount ()

Returns the number of UsbEndpoints this interface contains.

Returns
int the number of endpoints

getId

public int getId ()

Returns the interface's bInterfaceNumber field. This is an integer that along with the alternate setting uniquely identifies the interface on the device.

Returns
int the interface's ID

getInterfaceClass

public int getInterfaceClass ()

Returns the interface's class field. Some useful constants for USB classes can be found in UsbConstants

Returns
int the interface's class

getInterfaceProtocol

public int getInterfaceProtocol ()

Returns the interface's protocol field.

Returns
int the interface's protocol

getInterfaceSubclass

public int getInterfaceSubclass ()

Returns the interface's subclass field.

Returns
int the interface's subclass

getName

public String getName ()

Returns the interface's name.

Returns
String the interface's name, or null if the property could not be read

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

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

Returns
String a string representation of the object.

writeToParcel

public void writeToParcel (Parcel parcel, 
                int flags)

Flatten this object in to a Parcel.

Parameters
parcel Parcel: The Parcel in which the object should be written.

flags int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES