Saving with SQLite
There are many different ways for storing your Android applications’ data. As you learned in Chapter 14, “Using Android Preferences,” and in Chapter 15, “Accessing Files and Directories,” there is definitely more than one way for accessing and storing your data. But what if you need to store structured data for your application, such as data more suited for storing in a database? That’s where SQLite comes in. In this chapter, we are going to be modifying the SampleMaterial application found in Chapter 12, “Embracing Material Design,” so that Card data is stored persistently in a SQLite database on the device and will survive various lifecycle events. By the end of this chapter, you will be confident in adding a SQLite database for your application.
SampleMaterial Upgraded with SQLite
The SampleMaterial application found in Chapter 12, “Embracing Material Design,” shows you how to work with data in the application but fails when it comes to storing the data permanently so that it survives Android lifecycle events. When adding, updating, and deleting cards from the SampleMaterial application, and then clearing the SampleMaterial application from the Recent apps, the application is not able to remember what cards were added, updated, and deleted. So we updated the application to store the information in a SQLite database to keep track of the data permanently. Figure 16.1 shows the SampleSQLite application, which looks the same as the SampleMaterial application, but is backed by a SQLite database.