title: Code for Identifying a Single letter?
body: <p>Hi there I am a bit of a noob at programming but I want to create an IF statement , whether or not a textview , (which i have already referenced) contains a letter in side of it and only that letter for example I want to change any textview which has a "1" in it whats the code? this is what I have got can some one please help me complete it?</p>
  
  <pre><code>if ("!".contains(stuff.getText()) {
      stuff.setText("Incorrect Symbol");
  }else {
  
  }
  </code></pre>
  
  <p>I know that I can use the keyboard to control what can be entered but I would prefer that someone would tell me how to do it this way. By the way I keep on get a little red line over  stuff.gettext so can some one please tell me the problem?</p>