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What is the difference between java.util.prefs.Preferences and
android.content.SharedPreferences? Looks like they are for similar things - you can put and get a value by a key in both of them, but Preferences looks like something more difficult and belongs more to the OS than to an app.
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Preferences in Android are used to keep track of application and user preferences. In our case, we can modify the SharedPreference instance in our case using the edit() and use the putInt(String key, int newVal) We increased the count for our application that presist beyond the application and displayed accordingly.
Android Shared Preferences Overview Android stores Shared Preferences settings as XML file in shared_prefs folder under DATA/data/{application package} directory. The DATA folder can be obtained by calling Environment.
Shared preferences can only store key-value pairings whilst an SQLite database is much more flexible. So shared preferences are particularly useful for storing user preferences, e.g. should the app display notifications etc. Whilst an SQLite database is useful for just about anything.
Unlike commit() , which writes its preferences out to persistent storage synchronously, apply() commits its changes to the in-memory SharedPreferences immediately but starts an asynchronous commit to disk and you won't be notified of any failures.
Preferences is a core java class link1
java.util.prefs.Preferences : This class allows applications to store and retrieve user and system preference and configuration data. This data is stored persistently in an implementation-dependent backing store.
SharedPreferences is an android specific interface link2
android.content.SharedPreferences : Interface for accessing and modifying preference data returned by getSharedPreferences(String, int). For any particular set of preferences, there is a single instance of this class that all clients share.
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