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About shared preferences

About shared preferences: Android App Development Essentials: Local Data Storage
About shared preferences: Android App Development Essentials: Local Data Storage

The simplest sort of data that you can store persistently on disk in an Android app is called a preference. Preference values are saved in unencrypted XML files in what’s known to developers as internal storage. This storage area is invisible to the user; unless the device is rooted, the user can’t see files in internal storage with a file manager app. You can keep all of an app’s shared preferences in a single file, or you can break them up into multiple files. The choice is yours.

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