Why getHeight() of a Viewgroup does not change
<p>I have a LinearLayout (ViewGroup).  And in my code, I have added a child view (another linear layout) to the LinearLayout.  My question is why the LinearLayout 's getHeight() return the SAME value? On the phone, I do see my child linear layout is visible and is displayed correctly. But why the getHeight() does not return me the right value?</p>

<p>And I have looked at the source code of add() in ViewGroup. It does call 'requestLayout()' so I expect the getHeight() of the ViewGroup does get update correctly. Am I correct?</p>
