Problems with prefilled EditTexts

Hi there,

I like this lib.

So I started with a German IBAN.

The mask is like this: "AA99 9999"

Now I want to prefill the EditText with "DE".

But setting it in JAVA (after the TextChangedListener is added) and/or in XML like android:text="DE" the keyboard is wrong.

The keyboard should only show digits, but it shows alphanumeric.

Greetings,
DaRolla
