Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Inherited Constants](https://developer.android.com/reference/android/hardware/usb/UsbInterface#inhconstants) \| [Fields](https://developer.android.com/reference/android/hardware/usb/UsbInterface#lfields) \| [Methods](https://developer.android.com/reference/android/hardware/usb/UsbInterface#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/hardware/usb/UsbInterface#inhmethods)

# UsbInterface

*** ** * ** ***

` public class UsbInterface `   
` extends https://developer.android.com/reference/java/lang/Object ` ` implements https://developer.android.com/reference/android/os/Parcelable `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.hardware.usb.UsbInterface |

<br />

*** ** * ** ***

A class representing an interface on a `https://developer.android.com/reference/android/hardware/usb/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 `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint`s, 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](https://developer.android.com/guide/topics/usb) developer guide.

<br />

## Summary

### Inherited constants

From interface `https://developer.android.com/reference/android/os/Parcelable` `int` `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR`

Descriptor bit used with `https://developer.android.com/reference/android/os/Parcelable#describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int` `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE`

Flag for use with `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`: 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 https://developer.android.com/reference/android/os/Parcelable.Creator<https://developer.android.com/reference/android/hardware/usb/UsbInterface>` | `https://developer.android.com/reference/android/hardware/usb/UsbInterface#CREATOR` <br /> |

| ### Public methods ||
|---|---|
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getAlternateSetting()() ` Returns the interface's bAlternateSetting field. |
| ` https://developer.android.com/reference/android/hardware/usb/UsbEndpoint` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getEndpoint(int)(int index) ` Returns the `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint` at the given index. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getEndpointCount()() ` Returns the number of `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint`s this interface contains. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getId()() ` Returns the interface's bInterfaceNumber field. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getInterfaceClass()() ` Returns the interface's class field. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getInterfaceProtocol()() ` Returns the interface's protocol field. |
| ` int` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getInterfaceSubclass()() ` Returns the interface's subclass field. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#getName()() ` Returns the interface's name. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#toString()() ` Returns a string representation of the object. |
| ` void` | ` https://developer.android.com/reference/android/hardware/usb/UsbInterface#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel parcel, int flags) ` Flatten this object in to a Parcel. |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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` ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.
From interface ` https://developer.android.com/reference/android/os/Parcelable ` ` abstract int` ` https://developer.android.com/reference/android/os/Parcelable#describeContents()() `

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
` abstract void` ` https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) `

Flatten this object in to a Parcel.

## Fields

### CREATOR

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final Creator<UsbInterface> CREATOR
```

<br />

<br />

## Public methods

### describeContents

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`, the return value of this method must include the `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` bit.

<br />

| Returns ||
|---|---|
| `int` | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or - `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` |

### getAlternateSetting

Added in [API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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. `https://developer.android.com/reference/android/hardware/usb/UsbDeviceConnection#setInterface(android.hardware.usb.UsbInterface)` can be used to switch between two interfaces with the same ID but different alternate setting.

<br />

| Returns ||
|---|---|
| `int` | the interface's alternate setting <br /> |

### getEndpoint

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public UsbEndpoint getEndpoint (int index)
```

Returns the `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint` at the given index.

<br />

| Parameters ||
|---|---|
| `index` | `int` <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint` | the endpoint <br /> |

### getEndpointCount

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getEndpointCount ()
```

Returns the number of `https://developer.android.com/reference/android/hardware/usb/UsbEndpoint`s this interface contains.

<br />

| Returns ||
|---|---|
| `int` | the number of endpoints <br /> |

### getId

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.

<br />

| Returns ||
|---|---|
| `int` | the interface's ID <br /> |

### getInterfaceClass

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getInterfaceClass ()
```

Returns the interface's class field. Some useful constants for USB classes can be found in `https://developer.android.com/reference/android/hardware/usb/UsbConstants`

<br />

| Returns ||
|---|---|
| `int` | the interface's class <br /> |

### getInterfaceProtocol

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getInterfaceProtocol ()
```

Returns the interface's protocol field.

<br />

| Returns ||
|---|---|
| `int` | the interface's protocol <br /> |

### getInterfaceSubclass

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getInterfaceSubclass ()
```

Returns the interface's subclass field.

<br />

| Returns ||
|---|---|
| `int` | the interface's subclass <br /> |

### getName

Added in [API level 21](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String getName ()
```

Returns the interface's name.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the interface's name, or `null` if the property could not be read <br /> |

### toString

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String toString ()
```

Returns a string representation of the object.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | a string representation of the object. <br /> |

### writeToParcel

Added in [API level 12](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void writeToParcel (Parcel parcel, 
                int flags)
```

Flatten this object in to a Parcel.

<br />

| Parameters ||
|---|---|
| `parcel` | `Parcel`: The Parcel in which the object should be written. This value cannot be `null`. <br /> |
| `flags` | `int`: Additional flags about how the object should be written. May be 0 or `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of the following: - `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` |