Activities are one of the fundamental building blocks of Android apps. The app UI is built from Activities, so if you want to become an app developer, you'll have to know how to create Activities.
In this course, you'll get a thorough introduction to Android Activities, with all the basic concepts explained. You'll learn to navigate between Activities, passing data from one to the other. You will also learn about the Activity lifecycle and how to handle configuration changes in case of screen rotation.