rounded imageView https://howtodoandroid.com/shapeableimageview-material-components-android/

turned off dark theme https://stackoverflow.com/a/67064345/12972985

shared preference https://developer.android.com/training/data-storage/shared-preferences

transaction animation https://medium.com/mobile-app-development-publication/animate-android-activities-transition-bf7f89a74b35

View Binding in RecyclerView Adapter https://www.geeksforgeeks.org/how-to-use-view-binding-in-recyclerview-adapter-class-in-android/

item separator https://stackoverflow.com/a/57886251/12972985

Dialog https://medium.com/swlh/alertdialog-and-customdialog-in-android-with-kotlin-f42a168c1936

Contacts from phone https://medium.com/@kednaik/android-contacts-fetching-using-coroutines-aa0129bffdc4