<LinearLayout
     android:id="@+id/A"
     android:layout_height="fill_parent"
     android:layout_width="fill_parent"
     android:weightSum="8.0"
     android:orientation="vertical">
     <LinearLayout
          android:id="@+id/B"
          android:layout_height="0dip"
          android:layout_width="fill_parent"
          android:layout_weight="1.0"/>
     <LinearLayout
          android:id="@+id/C"
          android:layout_height="0dip"
          android:layout_width="fill_parent"
          android:layout_weight="3.0"
</LinearLayout>

Context context;

@Override
public void onAttach(Activity activity){
    super.onAttach(activity);

    context = activity;


}

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    Display display = ((WindowManager)
        context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
    DisplayMetrics metrics = new DisplayMetrics();
    display.getMetrics(metrics);

    float pixHeight = metrics.heightPixels;
    float pixWidth = metrics.widthPixels;
    float density  = context.getResources().getDisplayMetrics().density;
    float dpHeight = pixHeight / density;
    float dpWidth  = pixWidth / density;

    // make various layouts using your measurements, send the
    // measure of each parent to each custom drawn child, or
    // send the bounds of each child as determined by the size of each parent

    return someView;
}