Hierarchical Parent Error when create new android project
<p>When I create new android project, in "New blank activity", the wizard show an error 
<code>Activity name must be specified</code> as below:</p>

<p><img src="http://i.stack.imgur.com/y8uq0.png" alt="enter image description here"></p>

<p>What is this error? and Hierarchical parent used to be for what?
if I type a string in Hierarchical Parent (ex: "test") then the error disappear.</p>

<p>and What is <code>Error parsing XML: junk after document element</code>? this error appear in my layout xml file.</p>
