Question

I just realized that in different Activities, I use different SharedPreferences. For example, I have things like this:

SharedPreferences prefs = PreferenceManager.
    getDefaultSharedPreferences( LoginActivity.this);

and

SharedPreferences prefs = PreferenceManager.
    getDefaultSharedPreferences( ProblemioActivity.this);

and then I have been putting data into the prefs object.

But my data seems to persist. How is that possible? Should I have been using something like this:

activity.getSharedPreference("SomeKey", Mode);

Answer 1

Those aren’t different shared preferences. They are the same! In both cases, you are passing the application context via the activity instance.

To use multiple shared preferences, you can specify a name with Context#getSharedPreferences(java.lang.String, int)