March 2013
Beginner to intermediate
580 pages
16h 11m
English
Content preview from Android Programming: The Big Nerd Ranch GuideBecome 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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17Saving and Loading Local Files
Almost every application needs a place to save data. In this chapter, you will enable CriminalIntent to save and load its data from a JSON file stored on the device’s filesystem.
Each application on an Android device has a directory in its sandbox. Keeping files in the sandbox protects them from being accessed by other applications or even the prying eyes of users (unless the device has been “rooted,” in which case the user can get to whatever he or she likes.)
Each application’s sandbox directory is a child of the device’s /data/data directory named after the application package. For CriminalIntent, the full path to the sandbox directory is /data/data/com.bignerdranch.android.criminalintent.
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