title: Error:(105) Error parsing XML: unbound prefix
body: <p>i got 3 errors on my projects :</p>
  
  <p>First and Second Error : </p>
  
  <p>First: Error:(105) Error parsing XML: unbound prefix</p>
  
  <pre><code>&lt;com.melnykov.fab.FloatingActionButton
      android:id="@+id/fabButton"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginBottom="24dp"
      android:layout_marginRight="24dp"
      android:src="@drawable/ic_action_new"
      app:fabSize="normal"
      app:layout_anchor="@id/profileListView"
      android:elevation="2dp"
      android:layout_marginEnd="41dp"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:layout_alignParentEnd="true"
      fab:fab_colorNormal="@color/colorFloatActionButton"
      fab:fab_colorPressed="@color/colorFloatActionButton"
      fab:fab_colorRipple="@color/colorRipple" /&gt;
  </code></pre>
  
  <p>Second Error : Error:(105) Error parsing XML: unbound prefix</p>
  
  <pre><code>&lt;com.melnykov.fab.FloatingActionButton
      android:id="@+id/fabButton"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginBottom="24dp"
      android:layout_marginRight="24dp"
      android:src="@drawable/ic_action_new"
      app:fabSize="normal"
      app:layout_anchor="@id/profileListView"
      android:elevation="2dp"
      android:layout_marginEnd="41dp"
      android:layout_alignParentBottom="true"
      android:layout_alignParentRight="true"
      android:layout_alignParentEnd="true"
      fab:fab_colorNormal="@color/colorFloatActionButton"
      fab:fab_colorPressed="@color/colorFloatActionButton"
      fab:fab_colorRipple="@color/colorRipple" /&gt;
  </code></pre>
  
  <p>Third Errror : </p>
  
  <p>Error:Execution failed for task ':app:processDebugResources'.</p>
  
  <blockquote>
    <p>com.android.ide.common.process.ProcessException: Failed to execute aapt</p>
  </blockquote>