This video helps you understand the Activity Lifecycle. Android activity and fragment lifecycle is most popular topic for android developer interviews so learn it with enough effort.
Visit this link and download the project...
https://github.com/google-developer-training/android-kotlin-fundamentals-starter-apps/tree/master/DessertClicker-Starter
After you download the project open it in Android Studio.
Google Codelab link...
https://codelabs.developers.google.com/codelabs/kotlin-android-training-lifecycles-logging/index.html?index=..%2F..android-kotlin-fundamentals#2
