title: How to set transparent background for Image Button in code?
body: <p>I can set ImageButton background transparent in <code>layout.xml</code> using:</p>
  
  <pre><code>android:background="@android:color/transparent"
  </code></pre>
  
  <p>How I can acomplish same thing using java code?
  Something like <code>ib.setBackgroundColor(???);</code></p>