title: Very simple example about a button in Android?
body: <p>I want a very simple button with some explanation/vizual-thing, perhaps onCreate/onLauncher to do what makes you smile! I have tried buttons <a href="http://pastie.org/5189178" rel="nofollow noreferrer">here</a> but errs <a href="https://i.stack.imgur.com/ekk9R.jpg" rel="nofollow noreferrer">here</a>, probably easiest if someone could direct me to a ready working example about a button in Android. History shows problems with R and XML -files, probably easiest if someone could state it clearly how to do it: a very simple button. Its directory tree etc?</p>
  
  <p><strong>Please, provide a simple example about a button in Android, nothing else.</strong></p>
  
  <blockquote>
    <p><img src="https://i.stack.imgur.com/sZABr.png" alt="enter image description here"></p>
  </blockquote>