In this video, learn how to parse a Cursor and display the records in a RecyclerView.
- [Instructor] Android uses cursors as the result…of queries against SQLite.…Previously, we discussed how cursors…are like pointers to your data.…What's more, they must be closed after they are used.…So I like to wrap my interactions with them…inside of a try finally block.…Let's do that now.…Here on line 80 we'll set up a local variable…for our cursor returned from the raw query method…and we'll name it cursor.…
Then right underneath this on line 81,…we'll open up try finally block.…Inside of our finally block,…we're going to check for if the cursor is not null…and it's not closed already.…If that's the case, then we're going to close it.…So, we're going to type if.…We'll check for first that the cursor…is not equal to null,…and then we want to check that the cursor is not closed.…
If both of these things are true,…then we need to close the cursor,…and we can do that by calling the cursors close method.…Now, we're done with the finally block.…We can go back up to our try block.…Inside here what we want to do is create a while loop…
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 59m 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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