ActivityScenario.ActivityAction
public
static
interface
ActivityScenario.ActivityAction
| androidx.test.core.app.ActivityScenario.ActivityAction<A extends android.app.Activity> |
ActivityAction interface should be implemented by any class whose instances are intended to be
executed by the main thread. An Activity that is instrumented by the ActivityScenario is passed
to perform(A) method.
Example:
ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class);
scenario.onActivity(activity -> {
assertThat(activity.getSomething()).isEqualTo("something");
});
You should never keep the Activity reference. It should only be accessed in perform(A) scope for two reasons: 1) Android framework may re-create the Activity
during lifecycle changes, your holding reference might be stale. 2) It increases the reference
counter and it may affect to the framework behavior, especially after you finish the Activity.
Bad Example:
ActivityScenario<MyActivity> scenario = ActivityScenario.launch(MyActivity.class);
final MyActivity[] myActivityHolder = new MyActivity[1];
scenario.onActivity(activity -> {
myActivityHolder[0] = activity;
});
assertThat(myActivityHolder[0].getSomething()).isEqualTo("something");
Summary
Public methods | |
|---|---|
abstract
void
|
perform(A activity)
This method is invoked on the main thread with the reference to the Activity. |
Public methods
perform
void perform (A activity)
This method is invoked on the main thread with the reference to the Activity.
| Parameters | |
|---|---|
activity |
A: an Activity instrumented by the ActivityScenario. It never be null.
|
Interfaces
Classes