In this video Annyce will show you how to use the GSON field converter class to persist Lists of Objects as JSON in your SQLite database.
- [Instructor] The Gson field converter class…is used to convert and store fields…as Json in your database.…In order to use it,…we first need to add the dependency…for the Gson cover tool to our application.…And then we can refresh our project.…Let's do that now.…We'll scroll down to underneath where…we've defined our cupboard dependency…here on line 36 of our build.gradle file.…I'll just type Enter and begin to input…the dependency for the cupboard tools project.…And that is nl.littlerobots….cupboard-Tools:…gson:0.3.1.…
And now we can refresh our project.…With that done we now have access…to the field converter.…Let's go ahead and open up our database…escrow light helper class…and modify our cupboard instance…by updating the builder.…(typing)…Since we're going to persist steps as Json,…we will no longer have to ignore that field.…This means that we can remove…the annotation support.…
So here on line 28 where we have use annotations,…we're going to simply remove this.…Instead, we're going to register a field…converter factory of type Gson list…
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
Android App Development: Unit Testingwith James P White2h 58m Intermediate
1. SQLite Basics
2. SQLite Beyond the Basics
3. Working with Cupboard
4. Realm Basics
5. Realm Beyond the Basics
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