How to restrict TextView to allow only alpha-numeric characters in Android

Question

I have a TextView in my app that i want a user to be able to only enter alpha-numeric characters in. How can this be done? Thanks!

Answer 1

In the XML, put this:

android:digits="abcdefghijklmnopqrstuvwxyz1234567890 "

Answer 2

Here is a better solution......... https://groups.google.com/forum/?fromgroups=#!topic/android-developers/hS9Xj3zFwZA

InputFilter filter = new InputFilter() { 
        public CharSequence filter(CharSequence source, int start, int end, 
Spanned dest, int dstart, int dend) { 
                for (int i = start; i < end; i++) { 
                        if (!Character.isLetterOrDigit(source.charAt(i))) { 
                                return ""; 
                        } 
                } 
                return null; 
        } 
}; 

edit.setFilters(new InputFilter[]{filter});