SQLite + Android – Display Data in RecyclerView (Book Library App) | Part 3

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We are going to create a Book Library application. Our application will have all the necessary functionality which every app with database should have. That includes CRUD, or Create, Read, Update and Delete functions. Also I’m going to teach you how to add Recyclerview and display data from our SQLite database in it. We are going to add some animations as well.

Project Files: https://github.com/stevdza-san/SQLite_Android-Complete_Tutorial

Part 1 ( Create Database Schema) – https://youtu.be/hJPk50p7xwA
Part 2 (Insert Data in Database Table) – https://youtu.be/RGzblJuat1M
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Part 4 (Update Table Data) – https://youtu.be/wK-JccC-i4Y
Part 5 (Delete Table Data) – https://youtu.be/J-CP7g_GwpI
Part 6 (Animate Recyclerview) – https://youtu.be/RBL9kUwnTJI

One of the main principles of SQL databases is the schema: a formal declaration of how the database is organized. The schema is reflected in the SQL statements that you use to create your database. You may find it helpful to create a companion class, known as a contract class, which explicitly specifies the layout of your schema in a systematic and self-documenting way.

A contract class is a container for constants that define names for URIs, tables, and columns. The contract class allows you to use the same constants across all the other classes in the same package. This lets you change a column name in one place and have it propagate throughout your code.