{% setvar book_path %}/reference/androidx/_book.yaml{% endsetvar %} {% include "_shared/_reference-head-tags.html" %}

KeyEventAction

public final class KeyEventAction implements ViewAction

Enables pressing KeyEvents on views.

Summary

Constants
`static final int`	`BACK_ACTIVITY_TRANSITION_MILLIS_DELAY`
`static final int`	`CLEAR_TRANSITIONING_ACTIVITIES_ATTEMPTS`
`static final int`	`CLEAR_TRANSITIONING_ACTIVITIES_MILLIS_DELAY`

Public constructors
`KeyEventAction(EspressoKey espressoKey)`

Public methods
`Matcher<View>`	`getConstraints()` A mechanism for ViewActions to specify what type of views they can operate on.
`String`	`getDescription()` Returns a description of the view action.
`void`	`perform(UiController uiController, View view)` Performs this action on the given view.

Constants

BACK_ACTIVITY_TRANSITION_MILLIS_DELAY

public static final int BACK_ACTIVITY_TRANSITION_MILLIS_DELAY

CLEAR_TRANSITIONING_ACTIVITIES_ATTEMPTS

public static final int CLEAR_TRANSITIONING_ACTIVITIES_ATTEMPTS

CLEAR_TRANSITIONING_ACTIVITIES_MILLIS_DELAY

public static final int CLEAR_TRANSITIONING_ACTIVITIES_MILLIS_DELAY

Public constructors

KeyEventAction

public KeyEventAction(EspressoKey espressoKey)

Public methods

getConstraints

public Matcher<View> getConstraints()

A mechanism for ViewActions to specify what type of views they can operate on.

A ViewAction can demand that the view passed to perform meets certain constraints. For example it may want to ensure the view is already in the viewable physical screen of the device or is of a certain type.

Returns
`Matcher<View>`	a `Matcher` that will be tested prior to calling perform.

getDescription

public String getDescription()

Returns a description of the view action. The description should not be overly long and should fit nicely in a sentence like: "performing %description% action on view with id ..."

perform

public void perform(UiController uiController, View view)

Performs this action on the given view.

Parameters
`UiController uiController`	the controller to use to interact with the UI.
`View view`	the view to act upon. never null.