Im trying to define a LinearLayout which contains another LinearLayout which should always be desplayed in the horizontal and vertical center. An ImageView should be placed always vertically centered on the right side of the parent Layout:

                                 A                                           B

I defined it the following:

 <LinearLayout android:id="@+id/footer"

android:orientation="horizontal" android:layout_height="50px" android:paddingTop="5px" android:layout_width="wrap_content" android:background="@drawable/footer_border" android:paddingRight="5px" android:paddingLeft="5px" android:layout_gravity="center_horizontal">

 <ImageView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="right"
 android:id="@+id/loading">
 </ImageView>

 </LinearLayout>

But unfornatuley its not working... The LinearLayout (A) and the ImageView (B) is on the left side.... But i set gravity to center and right?? Why?