title: How to get all Buttons ID's in one time on Android
body: <p>I have 16 <code>Button</code>s in my <code>Activity</code>   and I have to initialize those inside onCreate(). 
  Is there any way to initialize all buttons in one single line code?(loops etc.)
  Code should take all buttons <code>R.id.</code>  from <code>XML</code> Layout and process....</p>