Android
Utveckling
Building Your First App (Android Developers)
http://www.tutorialspoint.com/android/android_hello_world_example.htm
http://developer.android.com/training/basics/firstapp/creating-project.html
Android Studio
Meet Android Studio
Application Fundamentals
Device compatibility overview
Update the IDE and SDK Tools
Configure your build
Build your app from the command line
The Gradle Wrapper (Gradle Docs)
API reference
String
java.lang
View
Layouts
Activity - onCreate
TextView
Android SQLite Database Tutorial
How do I connect my SQLite database to my android app?
Save data in a local database using Room
Save data using SQLite
Android MySQL Tutorial to Perform Basic CRUD Operation
Android Room with a View
Save data in a local database using Room