title: xmlns:android="http://schemas.android.com/apk/res/android" this line is marked as error in Linear Layout
body: <p>In my XML file, i made a few <code>LinearLayout</code>'s, and for some reason I get an error on line : 
  <code>xmlns:android="http://schemas.android.com/apk/res/android"</code>.
  It is marked with red (Error) and the error log says : <code>"Unexpected namespace prefix "xmlns" found for tag LinearLayout"</code></p>
  
  <p>Does somebody know what that means?</p>