1. we are creating an Android SeekBar in Kotlin with examples. Challenge: Now that you are set up and familiar with the basic development workflow, do the following: This section lists possible homework assignments for students who are working through this codelab as part of a course led by an instructor. Run the HelloWorld app on virtual and physical devices. Bean Validation is the Java standard for validation and can be used in Kotlin as well. Run the app to see a Kotlin Android calendarview. Your Activity is usually associated with a UI layout file, defined as an XML file in the res/layout directory.