getting java.lang.NullPointerException while adding element to my resourse

Question

i'm trying to add a straight line in between two element's using view element like shown below

<view
  android:layout_width="2dp"
  android:layout_height="match_parent"
  android:id="@+id/view"

/>

but whenever i run application it stops and give me following error

Caused by: android.view.InflateException: Binary XML file line #34: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on 

a null object reference

 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference