I strucked in storing and getting shared preferences.When a user has been registered if that registration is success then that values has to be stored in his profile nothing but
You are using getSharedPreferences and getDefaultSharedPreferences together.
Do like this -
SharedPreferences sharedpreferences = getApplicationContext().getSharedPreferences("a2a", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString("enteredfname", enteredfname);
editor.putString("enteredlname", enteredlname);
editor.commit();
And later -
SharedPreferences preferences = getApplicationContext().getSharedPreferences("a2a", Context.MODE_PRIVATE);
String value = preferences.getString("enteredfname", "enteredfname");