Valid value formats for android:padding?
<p>When writing xml files, I know following is working:</p>

<pre><code>android:padding="20px"
</code></pre>

<p>Are there other valid value formats available for <code>padding</code>? e.g.</p>

<pre><code>android:padding="10px 20px 10px 20px"
</code></pre>
