title: set background image alertdialog
body: <p>I am trying to create a customized <code>AlertDialog</code> with <code>Buttons</code> and <code>RadioGroup</code>. I want to have a background image saved in my drawable for this <code>AlertDialog</code>. </p>
  
  <pre><code>AlertDialog.Builder alert = new AlertDialog.Builder(AutoGenerate.this);                    
  alert.setTitle("Select color");
  </code></pre>
  
  <p>Is there any alternative option like <code>alert.setbackgrounddrawable(R.drawable.img)</code>?</p>