title: How can I set up custom namespaces in layout file in Android studio?
body: <p>I am using the dragsortlistview library for my project which requires the usage of a custom namespace in the XML file in order to customize it.</p>
  
  <p>mylayout.xml:</p>
  
  <pre><code>&lt;com.mobeta.android.dslv.DragSortListView
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:dslv="http://schemas.android.com/apk/res-auto"
      android:id="@android:id/list"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_marginLeft="40dp"
      android:layout_marginRight="40dp"
      android:dividerHeight="10dp"
      android:divider="@color/light_grey"
      android:background="@color/light_grey"
      dslv:collapsed_height="2dp"
      dslv:drag_enabled="true"
      dslv:drag_handle_id="@drawable/drag_handle"
      dslv:drag_scroll_start="0.33"
      dslv:drag_start_mode="onMove"
      dslv:float_alpha="0.6"
      dslv:max_drag_scroll_speed="0.5"
      dslv:remove_enabled="true"
      dslv:remove_mode="flingRemove"
      dslv:slide_shuffle_speed="0.3"
      dslv:sort_enabled="true"
      dslv:track_drag_sort="false"
      dslv:use_default_controller="true"
      /&gt;
  </code></pre>
  
  <p>When I make this project I get errors like this for every attribute in the <code>dslv</code> namespace:</p>
  
  <pre><code>Gradle: No resource identifier found for attribute 'collapsed_height' in package 'net.mypackage'
  </code></pre>
  
  <p>How can I use custom namespace in Android Studio?</p>