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

PressBackAction

class PressBackAction : KeyEventActionBase

kotlin.Any
↳	androidx.test.espresso.action.KeyEventActionBase
	↳	androidx.test.espresso.action.PressBackAction

Performs an Android press back action

Summary

Public constructors
`PressBackAction(conditional: Boolean)` Performs a press back action
`PressBackAction(conditional: Boolean, espressoKey: EspressoKey!)`

Public functions
`Unit`	`perform(uiController: UiController!, view: View!)` Performs this action on the given view.

`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.

`const Int`	`BACK_ACTIVITY_TRANSITION_MILLIS_DELAY`
`const Int`	`CLEAR_TRANSITIONING_ACTIVITIES_ATTEMPTS`
`const Int`	`CLEAR_TRANSITIONING_ACTIVITIES_MILLIS_DELAY`

PressBackAction(conditional: Boolean)

Performs a press back action

Parameters
`conditional: Boolean`	Indicated whether or not to throw an exception when Espresso navigates outside the application or process under test. `true` will throw.

PressBackAction(conditional: Boolean, espressoKey: EspressoKey!)

fun perform(uiController: UiController!, view: View!): Unit

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.