October 2012
Intermediate to advanced
408 pages
9h 38m
English
Content preview from Android Application Development For Dummies, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Finding Places to Put Data
Depending on the requirements of your application, you may need to store data in a variety of places. For example, if an application interacts with music files and a user wants to play them in more than one music program, you have to store them in a location where all applications can access them. An application that needs to store sensitive data, such as encrypted usernames and password details, shouldn’t share data — placing it in a secure, local storage environment is the best strategy. Regardless of your situation, Android provides various options for storing data.
Viewing your storage options
The Android ecosystem provides various locations where data can be persisted:
Shared preferences: Private data stored in key-value pairs. (See Chapter 15 to find out how to handle shared preferences.)
Internal storage: A location for saving files on the device. Files stored in internal storage are private to your application by default, and other applications cannot access them. (Neither can the user, except by using your application.) When the application is uninstalled, the private files are deleted as well.
Local cache: The internal data directory for caching ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.