Set default background behind an activity's layout
<p>I have an activity with its layout set to an XML file.  the root layout is a <code>RelativeLayout</code> and i am setting the background to this layout via <code>rootLayout.setBackgroundResource(R.drawable.default_background);</code></p>

<p>this drawable, <code>R.drawable.default_background</code> has some transparency in it.</p>

<p>It seems as though the default background of any layout is black.  when i set the background to this drawable resource, the default black background seeps through the semi-transparent drawable.</p>

<p>How can i change the default background behind this drawable to white instead of black?</p>

<p>edit: i do not want to change the theme, as that changes more than just background</p>
