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From the name alone, I am guessing that Shared Preferences are... shared among apps? That is, even if my app defines and creates them, any app on android can access them. Is this correct?
(If this isn't correct, then why does the Data Storage Dev Guide emphasize Internal Storage as "Store private data"?)
If this is correct, can I modify this default behavior so that a preference is only visible from the app in which I define and create it?
If so, how do I do that?
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MODE_PRIVATE means the file which created by your app for storing app preferences data that can be only accessible to your own app only. No other app would be able to access that file. Follow this answer to receive notifications.
Shared Preferences provide modes of storing the data (private mode and public mode). It is for backward compatibility- use only MODE_PRIVATE to be secure. This method takes two arguments, the first being the name of the SharedPreference(SP) file and the other is the context mode that we want to store our file in.
No for its not safe or no for it is not possible to get these datas. With a simple rooted device, You can read all shared preferences.....
Shared Preferences allow you to save and retrieve data in the form of key,value pair. In order to use shared preferences, you have to call a method getSharedPreferences() that returns a SharedPreference instance pointing to the file that contains the values of preferences.
SharedPreferences are private by default. They are shared among the components of your app.
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