Added in API level 12

Summary: Inherited Constants | Fields | Methods | Inherited Methods

UsbDevice

Kotlin |Java

public class UsbDevice
extends Object implements Parcelable

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

This class represents a USB device attached to the android device with the android device acting as the USB host. Each device contains one or more UsbInterfaces, each of which contains a number of UsbEndpoints (the channels via which data is transmitted over USB).

This class contains information (along with UsbInterface and UsbEndpoint) that describes the capabilities of the USB device. To communicate with the device, you open a UsbDeviceConnection for the device and use UsbRequest to send and receive data on an endpoint. UsbDeviceConnection#controlTransfer is used for control requests on endpoint zero.

Developer Guides

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

Summary

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<UsbDevice>`	`CREATOR`

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`boolean`	`equals(Object o)` Indicates whether some other object is "equal to" this one.
`UsbConfiguration`	`getConfiguration(int index)` Returns the `UsbConfiguration` at the given index.
`int`	`getConfigurationCount()` Returns the number of `UsbConfiguration`s this device contains.
`int`	`getDeviceClass()` Returns the devices's class field.
`int`	`getDeviceId()` Returns a unique integer ID for the device.
`static int`	`getDeviceId(String name)`
`String`	`getDeviceName()` Returns the name of the device.
`static String`	`getDeviceName(int id)`
`int`	`getDeviceProtocol()` Returns the device's protocol field.
`int`	`getDeviceSubclass()` Returns the device's subclass field.
`UsbInterface`	`getInterface(int index)` Returns the `UsbInterface` at the given index.
`int`	`getInterfaceCount()` Returns the number of `UsbInterface`s this device contains.
`String`	`getManufacturerName()` Returns the manufacturer name of the device.
`int`	`getProductId()` Returns a product ID for the device.
`String`	`getProductName()` Returns the product name of the device.
`String`	`getSerialNumber()` Returns the serial number of the device.
`int`	`getVendorId()` Returns a vendor ID for the device.
`String`	`getVersion()` Returns the version number of the device.
`int`	`hashCode()` Returns a hash code value for the object.
`String`	`toString()` Returns a string representation of the object.
`void`	`writeToParcel(Parcel parcel, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Fields

CREATOR

Added in API level 12

public static final Creator<UsbDevice> CREATOR

Public methods

describeContents

Added in API level 12

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`

equals

Added in API level 12

public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
`o`	`Object`: This value may be `null`.

Returns
`boolean`	`true` if this object is the same as the obj argument; `false` otherwise.

getConfiguration

Added in API level 21

public UsbConfiguration getConfiguration (int index)

Returns the UsbConfiguration at the given index.

Parameters
`index`	`int`

Returns
`UsbConfiguration`	the configuration This value cannot be `null`.

getConfigurationCount

Added in API level 21

public int getConfigurationCount ()

Returns the number of UsbConfigurations this device contains.

Returns
`int`	the number of configurations

getDeviceClass

Added in API level 12

public int getDeviceClass ()

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

Returns
`int`	the devices's class

getDeviceId

Added in API level 12

public int getDeviceId ()

Returns a unique integer ID for the device. This is a convenience for clients that want to use an integer to represent the device, rather than the device name. IDs are not persistent across USB disconnects.

Returns
`int`	the device ID

getDeviceId

Added in API level 12

public static int getDeviceId (String name)

Parameters
`name`	`String`

Returns
`int`

getDeviceName

Added in API level 12

public String getDeviceName ()

Returns the name of the device. In the standard implementation, this is the path of the device file for the device in the usbfs file system.

Returns
`String`	the device name This value cannot be `null`.

getDeviceName

Added in API level 12

public static String getDeviceName (int id)

Parameters
`id`	`int`

Returns
`String`

getDeviceProtocol

Added in API level 12

public int getDeviceProtocol ()

Returns the device's protocol field.

Returns
`int`	the device's protocol

getDeviceSubclass

Added in API level 12

public int getDeviceSubclass ()

Returns the device's subclass field.

Returns
`int`	the device's subclass

getInterface

Added in API level 12

public UsbInterface getInterface (int index)

Returns the UsbInterface at the given index. For devices with multiple configurations, you will probably want to use UsbConfiguration#getInterface instead.

Parameters
`index`	`int`

Returns
`UsbInterface`	the interface This value cannot be `null`.

getInterfaceCount

Added in API level 12

public int getInterfaceCount ()

Returns the number of UsbInterfaces this device contains. For devices with multiple configurations, you will probably want to use UsbConfiguration#getInterfaceCount instead.

Returns
`int`	the number of interfaces

getManufacturerName

Added in API level 21

public String getManufacturerName ()

Returns the manufacturer name of the device.

Returns
`String`	the manufacturer name, or `null` if the property could not be read

getProductId

Added in API level 12

public int getProductId ()

Returns a product ID for the device.

Returns
`int`	the device product ID

getProductName

Added in API level 21

public String getProductName ()

Returns the product name of the device.

Returns
`String`	the product name, or `null` if the property could not be read

getSerialNumber

Added in API level 21

public String getSerialNumber ()

Returns the serial number of the device.

Returns
`String`	the serial number name, or `null` if the property could not be read

Throws
`SecurityException`	if the app targets SDK >= `android.os.Build.VERSION_CODES.Q` and the app does not have permission to read from the device.

getVendorId

Added in API level 12

public int getVendorId ()

Returns a vendor ID for the device.

Returns
`int`	the device vendor ID

getVersion

Added in API level 23

public String getVersion ()

Returns the version number of the device.

Returns
`String`	the device version This value cannot be `null`.

hashCode

Added in API level 12

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns
`int`	a hash code value for this object.

toString

Added in API level 12

public String toString ()

Returns a string representation of the object.

Returns
`String`	a string representation of the object.

writeToParcel

Added in API level 12

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. This value cannot be `null`.
`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