android - FrameLayout z-order not behaving as expected on Gingerbread? -

i have layout follows:

<framelayout   android:layout_width="match_parent"   android:layout_height="match_parent"   android:background="@android:color/black" >  <view   android:layout_width="match_parent"   android:layout_height="match_parent"   android:background="@android:color/white" >  <linearlayout   android:layout_width="match_parent"   android:layout_height="match_parent" >   <!-- children --> </linearlayout>  </framelayout> 

the linearlayout has no background , neither of children. can see white view beneath linearlayout on ice cream sandwich devices not on gingerbread devices. know why might , can it??

note: i'm not setting background of linearlayout white need perform animations on view object.