Learning Mobile App Development: A Hands-on Guide to Building Apps with iOS and Android

5. Persistent Data in Android

The capability to have data that the app uses or relies on to continue to be available regardless of changes to the app’s state as it moves through the app life cycle is vital to the user experience with the app—and for the app itself to be a useful tool. For this to occur, the data needs to persist through these life cycle changes. Android provides several ways in which the developer can make data persist. This chapter introduces you to three of these data persistence approaches. A significant amount of time will be spent on understanding and using the SQLite database system incorporated with Android, but the chapter also discusses storing data in files and demonstrates how to store individual pieces of data in ...