title: Error parsing XML: unbound prefix on library
body: <p>I am using three libraries in my project:</p>
  
  <pre><code>a. ViewPager
  b. SherlockActionBar
  c. PagerSlidingTabStrip
  </code></pre>
  
  <p>In my layout xml, I am getting the following <code>error parsing XML</code> in here:</p>
  
  <pre><code>&lt;com.astuetz.viewpager.extensions.PagerSlidingTabStrip
      android:id="@+id/strips"
      android:layout_width="match_parent"
      android:layout_height="48dip"
      app:indicatorColor="#FF9326"
      app:textAllCaps="false" /&gt;
  </code></pre>
  
  <p>I implemented the library same as the two other libraries used in the project. The other two libraries are running smoothly. Error only exists within this. Please help. </p>
  
  <p>Full layout xml:</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical"
      android:paddingBottom="@dimen/activity_vertical_margin"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      tools:context=".MainSlider" &gt;
  
      &lt;com.astuetz.viewpager.extensions.PagerSlidingTabStrip
          android:id="@+id/strips"
          android:layout_width="match_parent"
          android:layout_height="48dip"
          app:indicatorColor="#FF9326"
          app:textAllCaps="false" /&gt;
  
      &lt;android.support.v4.view.ViewPager
          android:id="@+id/pager"
          android:layout_width="fill_parent"
          android:layout_height="0dp"
          android:layout_weight="1" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>I have already tried cleaning the project, re-adding library to the workspace, etc.</p>