how to make android transparent keyboard?
<p>I am writing an Android application for API 2.2, where I need to use transparent keyboard and I have a problem. I can't find how to make keys for the keyboard. I can set alpha for key icon by setting this.</p>

<pre><code>mQwertyKeyboard.getKeys().get( i ).icon.mutate().setAlpha( 0 );
</code></pre>

<p>where <code>mQwertyKeyboard</code> is <code>QWERTYKeyboard extends Keyboard</code>, but how do I set alpha for key background? Thank you for help.</p>
