title: Set unchangeable some part of editText android
body: <p>I have some EditText for mobile number input. App must add unique text for every country. For example for Armenia is must add <code>+374</code> , and user must fill other numbers. Also <code>+374</code> must be unchangeable, user can't change or remove it. So is there some kind of ways for doing this?<img src="https://i.stack.imgur.com/aoaAj.png" alt="enter image description here"></p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>I don't want to use textView or another view with this text and put it left of the ediText. I want to find some way with less operations. I need text to be frozen not to check every text changes or add missing text when user will delete some part of it.</p>