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Summary: Methods | [Expand All]

UiController

public interface UiController

androidx.test.espresso.UiController
Known Indirect Subclasses

Provides base-level UI operations (such as injection of MotionEvents) that can be used to build user actions such as clicks, scrolls, swipes, etc. This replaces parts of the android Instrumentation class that provides similar functionality. However, it provides a more advanced synchronization mechanism for test actions. The key differentiators are:

  • test actions are assumed to be called on the main thread
  • after a test action is initiated, execution blocks until all messages in the main message queue have been cleared.

Summary

Public methods

abstract boolean injectKeyEvent(KeyEvent event)

Injects a key event into the application.

abstract boolean injectMotionEvent(MotionEvent event)

Injects a motion event into the application.

default boolean injectMotionEventSequence(Iterable<MotionEvent> events)
abstract boolean injectString(String str)

Types a string into the application using series of KeyEvents.

abstract void loopMainThreadForAtLeast(long millisDelay)

Loops the main thread for a specified period of time.

abstract void loopMainThreadUntilIdle()

Loops the main thread until the application goes idle.

Public methods

injectKeyEvent

boolean injectKeyEvent (KeyEvent event)

Injects a key event into the application.

Parameters
event KeyEvent: the (non-null!) event to inject
Returns
boolean true if the event was injected, false otherwise
Throws
InjectEventSecurityException if the event couldn't be injected because it would interact with another application.

injectMotionEvent

boolean injectMotionEvent (MotionEvent event)

Injects a motion event into the application.

Parameters
event MotionEvent: the (non-null!) event to inject
Returns
boolean true if the event was injected, false otherwise
Throws
InjectEventSecurityException if the event couldn't be injected because it would interact with another application. @Deprecated Please use injectMotionEventSequence this method will be removed in future.

injectMotionEventSequence

boolean injectMotionEventSequence (Iterable<MotionEvent> events)

Parameters
events Iterable

Returns
boolean

Throws
InjectEventSecurityException

injectString

boolean injectString (String str)

Types a string into the application using series of KeyEvents. It is up to the implementor to decide how to map the string to KeyEvent objects. If you need specific control over the key events generated use injectKeyEvent(KeyEvent).

Parameters
str String: the (non-null!) string to type
Returns
boolean true if the string was injected, false otherwise
Throws
InjectEventSecurityException if the events couldn't be injected because it would interact with another application.

loopMainThreadForAtLeast

void loopMainThreadForAtLeast (long millisDelay)

Loops the main thread for a specified period of time.

Control may not return immediately, instead it'll return after the provided delay has passed and the queue is in an idle state again.

Parameters
millisDelay long: time to spend in looping the main thread

loopMainThreadUntilIdle

void loopMainThreadUntilIdle ()

Loops the main thread until the application goes idle.

An empty task is immediately inserted into the task queue to ensure that if we're idle at this moment we'll return instantly.