Question

In my android app I have

    SharedPreferences usernamePref = context.getSharedPreferences(USERNAME_PREF, context.MODE_PRIVATE);
    String username = usernamePref.getString(USERNAME_PREF, ERROR);

    SharedPreferences emailPref = context.getSharedPreferences(EMAIL_PREF, context.MODE_PRIVATE);
    String email = emailPref.getString(EMAIL_PREF, ERROR);

    SharedPreferences passwordPref = context.getSharedPreferences(PASSWORD_PREF, context.MODE_PRIVATE);
    String password = usernamePref.getString(PASSWORD_PREF, ERROR);

The reason this is confusing me is because the key is being used twice, which seems redundant. So I am wondering, is it possible to just get all the preferences from a single SharedPreferences object?

Answer 1

This is the way I typically do it:

PreferenceManger prefManager = PreferenceManager.getDefaultSharedPreferences(context);
String username = prefManager.getString(USERNAME_PREF);
String email = prefManager.getString(EMAIL_PREF);
String password = prefManager.getString(PASSWORD_PREF);

Note: You will want to be editting the single SharedPreferences for your app, not individual as you have it now. To edit it this way do the following:

PreferenceManger prefManager = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor editor = prefManager.edit();
editor.putString(USERNAME_PREF, usernameString);
editor.putString(EMAIL_PREF, emailString);
editor.putString(PASSWORD_PREF, passwordString);
editor.commit();