ActivityScenario

class ActivityScenario<A : Activity?>

Before:
  MyActivity activity = Robolectric.setupActivity(MyActivity.class);
  assertThat(activity.getSomething()).isEqualTo("something");

After:
  try(ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class)) {
    scenario.onActivity(activity -> {
      assertThat(activity.getSomething()).isEqualTo("something");
    });
  }

Before:
  ActivityController<MyActivity> controller = Robolectric.buildActivity(MyActivity.class);
  controller.create().start().resume();  // Moves the activity state to State.RESUMED.
  controller.pause();    // Moves the activity state to State.STARTED. (ON_PAUSE is an event).
  controller.stop();     // Moves the activity state to State.CREATED. (ON_STOP is an event).
  controller.destroy();  // Moves the activity state to State.DESTROYED.

After:
  try(ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class)) {
    scenario.moveToState(State.RESUMED);    // Moves the activity state to State.RESUMED.
    scenario.moveToState(State.STARTED);    // Moves the activity state to State.STARTED.
    scenario.moveToState(State.CREATED);    // Moves the activity state to State.CREATED.
    scenario.moveToState(State.DESTROYED);  // Moves the activity state to State.DESTROYED.
  }

close

fun close(): Unit

Finishes the managed activity and cleans up device's state. This method blocks execution until the activity becomes State#DESTROYED.

It is highly recommended to call this method after you test is done to keep the device state clean although this is optional.

You may call this method more than once. If the activity has been finished already, this method does nothing.

Avoid calling this method directly. Consider one of the following options instead:

        
 Option 1, use try-with-resources:

 try (ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class)) {
   // Your test code goes here.
 }

 Option 2, use ActivityScenarioRule:


        
@Rule
        
 public ActivityScenarioRule<MyActivity> rule = new ActivityScenarioRule<>(MyActivity.class);


        
@Test
        
 public void myTest() {
   ActivityScenario<MyActivity> scenario = rule.getScenario();
   // Your test code goes here.
 }

      

getResult

fun getResult(): ActivityResult

Waits for the activity to be finished and returns the activity result.

Note: This method doesn't call Activity#finish(). The activity must be finishing or finished otherwise this method will throws runtime exception after the timeout.

Example:
  ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class);
  // Let's say MyActivity has a button that finishes itself.
  onView(withId(R.id.finish_button)).perform(click());
  assertThat(scenario.getResult().getResultCode()).isEqualTo(Activity.RESULT_OK);

getState

fun getState(): State

Returns the current activity state. The possible states are State#CREATED, STARTED, State#RESUMED, and State#DESTROYED.

This method cannot be called from the main thread except in Robolectric tests.

launch

fun <A : Activity?> launch(activityClass: Class<A>): ActivityScenario<A>

Launches an activity of a given class and constructs ActivityScenario with the activity. Waits for the lifecycle state transitions to be complete. Typically the initial state of the activity is State#RESUMED but can be in another state. For instance, if your activity calls Activity#finish from your Activity#onCreate, the state is DESTROYED when this method returns.

If you need to supply parameters to the start activity intent, use launch.

If you need to get the activity result, use launchActivityForResult.

This method cannot be called from the main thread except in Robolectric tests.

launch

fun <A : Activity?> launch(activityClass: Class<A>, activityOptions: Bundle): ActivityScenario<A>

launch

fun <A : Activity?> launch(startActivityIntent: Intent): ActivityScenario<A>

Launches an activity by a given intent and constructs ActivityScenario with the activity. Waits for the lifecycle state transitions to be complete. Typically the initial state of the activity is State#RESUMED but can be in another state. For instance, if your activity calls Activity#finish from your Activity#onCreate, the state is DESTROYED when this method returns.

If you need to get the activity result, use launchActivityForResult.

This method cannot be called from the main thread except in Robolectric tests.

launch

fun <A : Activity?> launch(startActivityIntent: Intent, activityOptions: Bundle): ActivityScenario<A>

launchActivityForResult

fun <A : Activity?> launchActivityForResult(activityClass: Class<A>): ActivityScenario<A>

Launches an activity of a given class and constructs ActivityScenario with the activity. Waits for the lifecycle state transitions to be complete. Typically the initial state of the activity is State#RESUMED but can be in another state. For instance, if your activity calls Activity#finish from your Activity#onCreate, the state is DESTROYED when this method returns. Broadcasts activity result.

If you need to supply parameters to the start activity intent, use .

This method cannot be called from the main thread except in Robolectric tests.

launchActivityForResult

fun <A : Activity?> launchActivityForResult(
    activityClass: Class<A>,
    activityOptions: Bundle
): ActivityScenario<A>

Launches an activity of a given class and activity options and constructs ActivityScenario with the activity. @see #launchActivityForResult(Class)

launchActivityForResult

fun <A : Activity?> launchActivityForResult(startActivityIntent: Intent): ActivityScenario<A>

Launches an activity by a given intent and constructs ActivityScenario with the activity. Waits for the lifecycle state transitions to be complete. Typically the initial state of the activity is State#RESUMED but can be in another state. For instance, if your activity calls Activity#finish from your Activity#onCreate, the state is DESTROYED when this method returns. Broadcasts activity result.

This method cannot be called from the main thread except in Robolectric tests.

launchActivityForResult

fun <A : Activity?> launchActivityForResult(
    startActivityIntent: Intent,
    activityOptions: Bundle
): ActivityScenario<A>

Launches an activity by a given intent and constructs ActivityScenario with the activity. @see #launchActivityForResult(Intent)

moveToState

fun moveToState(newState: State): ActivityScenario<A>

Moves Activity state to a new state.

If a new state and current state are the same, it does nothing. It accepts CREATED, State#STARTED, State#RESUMED, and State#DESTROYED.

State#DESTROYED is the terminal state. You cannot move the state to other state after the activity reaches that state.

The activity must be at the top of the back stack (excluding internal facilitator activities started by this library), otherwise AssertionError may be thrown. If the activity starts another activity (such as DialogActivity), make sure you close these activities and bring back the original activity foreground before you call this method.

This method cannot be called from the main thread except in Robolectric tests.

onActivity

fun onActivity(action: ActivityScenario.ActivityAction<A>): ActivityScenario<A>

Runs a given action on the current Activity's main thread.

Note that you should never keep Activity reference passed into your action because it can be recreated at anytime during state transitions.

recreate

fun recreate(): ActivityScenario<A>

Recreates the Activity.

A current Activity will be destroyed after its data is saved into android.os.Bundle with Activity#onSaveInstanceState(Bundle), then it creates a new Activity with the saved Bundle. After this method call, it is ensured that the Activity state goes back to the same state as its previous state.

This method cannot be called from the main thread except in Robolectric tests.