What's the difference between getDefaultSharedPreferences() and getPreferences()?

Question

I\'m currently taking the \"Developing Android Apps\" Udacity course. In the \"Lesson 3: New Activities and Intents > Use SharedPreferences\" segment, the instructor asked

Answer 1

Acoording to the link you provided to Android documentation

getSharedPreferences() - Use this if you need multiple preferences files identified by name, which you specify with the first parameter.

getPreferences() - Use this if you need only one preferences file for your Activity. Because this will be the only preferences file for your Activity, you don't supply a name.

So it is, use getSharedPreferences when the data you want to save/retrieve can be used from different activities in the app. If those preferences will only be used in one Activity, you can use getPreferences.

Edit: also note that as said in the post you linked 'getDefaultSharedPreferences will use a default name like "com.example.something_preferences", but getSharedPreferences will require a name'