Added in [version 37.2](https://developer.android.com/topic/libraries/support-library/revisions)

# HidEventListener

*** ** * ** ***


`
public


interface
HidEventListener
`


`


`

|---|
| android.hardware.hid.HidEventListener |

<br />

*** ** * ** ***

Listener for receiving events from a `https://developer.android.com/reference/android/hardware/hid/HidDevice`.

## Summary

| ### Public methods ||
|---|---|
| ` abstract void` | ` https://developer.android.com/reference/android/hardware/hid/HidEventListener#onDisconnected()() ` Called when the HID device has been closed or disconnected. |
| ` abstract void` | ` https://developer.android.com/reference/android/hardware/hid/HidEventListener#onError(java.lang.Exception)(https://developer.android.com/reference/java/lang/Exception cause) ` Called when an error occurs during HID input report processing. |
| ` abstract void` | ` https://developer.android.com/reference/android/hardware/hid/HidEventListener#onInputReport(android.hardware.hid.Report)(https://developer.android.com/reference/android/hardware/hid/Report report) ` Called when an input report is received from the HID device. |

## Public methods

### onDisconnected

Added in [version 37.2](https://developer.android.com/topic/libraries/support-library/revisions)

```
public abstract void onDisconnected ()
```

Called when the HID device has been closed or disconnected.

This is the definitive signal that the device session has ended. All registered
listeners (including this instance) are automatically unregistered, and the device
is no longer usable.

<br />

### onError

Added in [version 37.2](https://developer.android.com/topic/libraries/support-library/revisions)

```
public abstract void onError (Exception cause)
```

Called when an error occurs during HID input report processing.

This callback is purely informative and **never** unregisters listeners.
On non-fatal errors, report processing continues. On fatal errors, this callback is
immediately followed by an explicit `https://developer.android.com/reference/android/hardware/hid/HidEventListener#onDisconnected()` invocation.

<br />

| Parameters ||
|---|---|
| `cause` | `Exception`: The exception describing the error. This value cannot be `null`. <br /> |

### onInputReport

Added in [version 37.2](https://developer.android.com/topic/libraries/support-library/revisions)

```
public abstract void onInputReport (Report report)
```

Called when an input report is received from the HID device.

<br />

| Parameters ||
|---|---|
| `report` | `Report`: This value cannot be `null`. <br /> |