# InputDriver
Summary:[Nested Classes](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#nestedclasses)\|[Methods](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#inhmethods)\|[\[Expand All\]](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#)
# InputDriver
`
public
class
InputDriver
`
`
extends `[Object](https://developer.android.com/reference/java/lang/Object)`
``
`
|---|--------------------------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | com.google.android.things.userdriver.input.InputDriver |
*** ** * ** ***
Driver to interface with user-connected input devices. User defined drivers should instantiate this class and call the appropriate emit method whenever input events are ready.
## Summary
| ### Nested classes ||
|----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` class` | [InputDriver.Builder](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver.Builder) Builder class for[InputDriver](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver)objects. |
| ### Public methods ||
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void` | ` `[emit](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#emit(com.google.android.things.userdriver.input.InputDriverEvent))`(`[InputDriverEvent](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriverEvent)` event) ` Emit a single driver event. |
| ### Inherited methods |
|-----------------------|---|
| [](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver#)From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object)` ` |--------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object) | ` `[clone](https://developer.android.com/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` `[finalize](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 `[Class](https://developer.android.com/reference/java/lang/Class)`` | ` `[getClass](https://developer.android.com/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this`Object`. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](https://developer.android.com/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](https://developer.android.com/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long, int))`(long millis, int nanos) ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long))`(long millis) ` Causes the current thread to wait until either another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object, or a specified amount of time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait())`() ` Causes the current thread to wait until another thread invokes the[notify()](https://developer.android.com/reference/java/lang/Object.html#notify())method or the[notifyAll()](https://developer.android.com/reference/java/lang/Object.html#notifyAll())method for this object. | ||
## Public methods
### emit
```
void emit (InputDriverEvent event)
```
Emit a single driver event.
| Parameters ||
|---------|-----------------------------------------------|
| `event` | `InputDriverEvent`: The event to emit.
|
| Throws ||
|--------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [IllegalArgumentException](https://developer.android.com/reference/java/lang/IllegalArgumentException) | if the given key is not in the list of keys configured for this driver. IllegalStateException if the driver is not yet registered with the UserDriverManager. |
-
## Classes
- [InputDriver](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver)
- [InputDriver.Builder](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriver.Builder)
- [InputDriverEvent](https://developer.android.com/reference/com/google/android/things/userdriver/input/InputDriverEvent)