In this video, learn how the @Database annotation works. See how it connects the various entities together, and review the generated code created by Room.
- [Instructor] Let's define our RoomDatabase class.…This class is required by Room…in order to generate our SQLite database…and associated tables.…So we're gonna start by creating a class…that extends the RoomDatabase abstract class…and we're gonna do that here inside of our DB package…so we're just gonna Command + N and create a new class…and we're going to name this TopsyTurveyDatabase…and we can click on OK.…And as I mentioned,…this is going to extend the RoomDatabase class…and we're going to make this class abstract…so we'll just add that here on line five.…
And you wanna think of this particular class…as a container class because the Room compiler…is actually going to generate…a concrete implementation of it…which we'll look at momentarily.…So like most things with Room,…this class is going to require an annotation…and that is the @Database annotation…so we'll add that here on line five…and then we're going to supply it with some information.…So the first thing it needs is a list of entities…that are going to be contained inside of our database.…
To begin, Annyce Davis reviews using the de facto data persistence solution available on Android: SQLite. She takes you through basic SQLite concepts—such as how to create a database wrapper and insert data into a table—as well as a few more advanced topics. Next, she covers working with Cupboard, an open-source project dedicated to simplifying your SQLite interactions. To wrap up, she dives into working with Realm, an object database solution designed with mobile devices in mind. Throughout the course, Annyce discusses establishing relationships between database tables, creating and running queries, as well as performing data migrations.
- Overview of SQLite
- Defining a database table's schema
- Exploring SQLite create table syntax
- Executing create table statements
- Inserting data with a foreign key relation
- Inspecting the database using a terminal
- Updating and deleting records
- Working with Cupboard
- Working with Realm
Skill Level Intermediate
Q: This course was updated on 05/24/2018. What changed?
A: New videos were added that cover working with Room.
Android App Development: Unit Testingwith James P White2h 58m Intermediate
Learning Firebase Cloud Messaging for Androidwith Joe Marini52m 49s Intermediate
1. SQLite Basics
2. SQLite Beyond the Basics
3. Working with Room
4. Working with Cupboard
5. Realm Basics
6. Realm Beyond the Basics
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