Android XML can not create toggle button

I just started to learn android. I added a toggle button in my xml and I get error. But if I remove the toggle button error disappear. I found some solution here but nothing is working for me. Here is my code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >


   <EditText 
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:id = "@+id/etCommands"
       android:hint="Type a command"
       android:password="true"
       />
<LinearLayout 
    android:weightSum="100"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    >
   <Button
       android:layout_marginTop="45dp"
       android:layout_weight="50"
       android:id="@+id/bResults"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="Button" />
   <ToggleButton 
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       />

   </LinearLayout>

   <TextView
       android:layout_marginTop="155dp"
       android:id="@+id/tvResults"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:gravity="center"
       android:text="invalid" />

</LinearLayout>

and in graphical layout I get this error

Exception raised during rendering: -1
Exception details are logged in Window > Show View > Error LogThe graphics preview in the layout editor may not be accurate:
Different corner sizes are not supported in Path.addRoundRect. (Ignore for this session)
Path.isConvex is not supported. (Ignore for this session)