MainThread

@Target([AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.CLASS, AnnotationTarget.FILE, AnnotationTarget.VALUE_PARAMETER]) class MainThread
androidx.annotation.MainThread

Denotes that the annotated method should only be called on the main thread. If the annotated element is a class, then all methods in the class should be called on the main thread.

Example:

 @MainThread public void deliverResult(D data) { ... } 

Note: Ordinarily, an app's main thread is also the UI thread. However, under special circumstances, an app's main thread might not be its UI thread; for more information, see Thread annotations.

Summary

Public constructors

Denotes that the annotated method should only be called on the main thread.

Public constructors

<init>

MainThread()

Denotes that the annotated method should only be called on the main thread. If the annotated element is a class, then all methods in the class should be called on the main thread.

Example:

 @MainThread public void deliverResult(D data) { ... } 

Note: Ordinarily, an app's main thread is also the UI thread. However, under special circumstances, an app's main thread might not be its UI thread; for more information, see Thread annotations.