FrameLayout expended in runtime but its children are not updated with new values
===

In my app I use the following FrameLayout as a container for a fragment that will be a footer:

    <FrameLayout
    android:id="@+id/frameLayoutFooter"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true"/>

In my activity I use the following code in order to add the fragment:

    FragmentManager fm = getSupportFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();
    mFooterFragment = new FooterFragment();
    ft.add(R.id.frameLayoutFooter, mFooterFragment);
    ft.commit();

And the layout of my footer fragment is:

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/footerContainer"
    android:layout_width="fill_parent"
    android:layout_height="165dip"
    android:layout_alignParentBottom="true"
    android:background="#15355b" >

    <RelativeLayout
        android:id="@+id/relativeLayoutTopSetcion"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">

    ..... some buttons and imageviews here...
    </RelativeLayout>

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/relativeLayoutBottomSetcion"
        android:layout_width="fill_parent"
        android:layout_height="350dip"
        android:layout_alignParentBottom="true"
        android:visibility="**invisible**" >
    ..... some more imageviews and textviews here...
    </RelativeLayout>
    </RelativeLayout>

At some point I would like to expand the footer and put some more imageviews and textviews in it, but unfortunately all my tries have failed, the result is that the fragment's FrameLayout **does get expanded but its children stays in the upper (old bottom) part even although they have alignParentBottom set to true** - what i get is that the footer's height does change and its bottom newly added part is transparent, which makes me think that the **its children are not updated with its new layout params.** 
Another thing is that I do see the the change of the mRelativeLayoutBottomSetcion.setVisibility(View.VISIBLE) -but is not in the bottom (the newly expanded section) of the FrameLayout but in the bottom of the original size before expanding.

in order to expand the fragment I used the following code from the activity this framents belongs to: 

    ViewGroup.LayoutParams params = mFrameLayoutFooter.getLayoutParams();
    params.height = 500; 
    mFrameLayoutFooter.requestLayout();
    // setting the bootom relative layout to be visible
    mRelativeLayoutBottomSetcion.setVisibility(View.VISIBLE);

What am I doing wrong ?

Is there a known UI pattern for expendable footer ?

Thanks in advance


