IllegalArgumentException, path separatos. The application takes .xml.xml

Question

I have an activity which needs to modify the SharedPreferences.

public class AddingEmail extends ListActivity implements OnClickListener{   

    private String newMail;
    private SharedPreferences prefs;
    private PreferenceManager prefMan;
    private EditText emailAdd;
    private EditText emailDel;
    private ArrayList<String> prefList;


@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.addingemail);
    Log.d("On Addig EMAIL ACTIVITY","on Create");

    String name = "com.example.daemon3_preferences";
    prefs = this.getSharedPreferences(name, MODE_PRIVATE);

And this is the PreferenceScreen..

public class PreferencesScreen extends PreferenceFragment{

    private final String TAG = "PreferencesScreen";
    private Set<String> emails;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d(TAG, "OnCreate");

        addPreferencesFromResource(R.xml.prefs);

And I have this error:

java.lang.IllegalArgumentException: File /data/data/com.example.daemon3/shared_prefs/com.example.daemon3_preferences.xml.xml contains a path separator

Why it takes .xml.xml instead of .xml?

Answer 1

Breaking out the comment thread into a formal answer here.

---

Instead of calling

String name = "com.example.daemon3_preferences";
prefs = this.getSharedPreferences(name, MODE_PRIVATE);

call this:

prefs = PreferenceManager.getDefaultSharedPreferences(this);

PreferenceFragment saves your settings with the PreferenceManager so by attempting to open the default preferences with getSharedPreferences, you might be interfering with the PreferenceManager which could be causing that particular exception.