title: Android Studio: Error parsing XML & URI is not registered
body: <p>After adding a new Activity to my project I get following error while compiling the layout</p>
  
  <blockquote>
    <p>Gradle: Error parsing XML: not well-formed (invalid token)</p>
  </blockquote>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:orientation="vertical" &gt;
  
  &lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:id="@+id/tv_password"
          android:text="&lt;password&gt;"/&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p><em>"<a href="http://schemas.android.com/apk/res/android" rel="noreferrer">http://schemas.android.com/apk/res/android</a>"</em> is marked red and hovering pops following message up</p>
  
  <blockquote>
    <p>URI is not registered ( Setting | Project Settings | Schemas and DTDs )</p>
  </blockquote>
  
  <p>My Settings>Project Settings>Schemas and DTDs look like that:
  <img src="https://i.stack.imgur.com/6Op4U.png" alt="Settings&gt;Project Settings&gt;Schemas and DTDs"></p>
  
  <p>I already found some similar questions around here but nothing helped me to solve this issue. I hope someone has an idea... :)</p>