title: RadioGroup for AppCompatRadioButtons not working on Jelly Bean?
body: <p>I have a fairly simple radio button group created with the AppCompatRadioButtons from the support library. However, the group does not seem to work on pre Lollipop versions. I am able to select every option and cannot find any indication on why it is doing this.</p>
  
  <p>I am testing with  an emulator running 4.1. As you can see below I can select multiple options.</p>
  
  <p><a href="https://i.stack.imgur.com/fEdch.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fEdch.png" alt="enter image description here"></a></p>
  
  <pre><code>&lt;RadioGroup
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal"&gt;
  
      &lt;android.support.v7.widget.AppCompatRadioButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:text="W"/&gt;
  
      &lt;android.support.v7.widget.AppCompatRadioButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:text="Q"/&gt;
  
      &lt;android.support.v7.widget.AppCompatRadioButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:text="B-Hum"/&gt;
  
      &lt;android.support.v7.widget.AppCompatRadioButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:text="B-Sci"/&gt;
  
      &lt;android.support.v7.widget.AppCompatRadioButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_weight="1"
          android:text="B-Soc"/&gt;
  &lt;/RadioGroup&gt;
  </code></pre>
  
  <p>Testing on Lollipop and Marshmallow gets required results.</p>