This RadioGroup layout or its LinearLayout parent is useless
<p>I am trying to embed <code>RadioGroup</code> with <code>LinearLayout</code>, so to add elements dynamically to my Layout. My code goes here</p>

<p>`</p>

<p></p>

<pre><code>&lt;RadioButton
    android:id="@+id/dailyCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/dailyCheck"/&gt;

&lt;RadioButton
    android:id="@+id/selectedCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/selectedCheck" /&gt;

&lt;RadioButton
    android:id="@+id/specificCheck"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/specificCheck" /&gt;
</code></pre>

<p>
`</p>

<p>Doing this shows an exception:</p>

<p><code>This RadioGroup layout or its LinearLayout parent is useless</code></p>

<p>Please suggest me what to do.</p>

<p>Why can't <code>LinearLayout</code> and <code>RadioGroup</code> be together in one file.</p>
