title: Validations in android/eclipse
body: <p>How to restrict an edittextbox with numbers and special symbols on android/eclipse.</p>
  
  <p>ie., i must want to allow only the characters (a-z &amp; A-Z) not the others.</p>
  
  <p>Is there any options available to do this through .xml(file)?</p>
  
  <p>Thanks in advance!.</p>