Android UI tableLayout centering, radiobuttons aligning and slidingdrawer visibility

view story

http://stackoverflow.com – Hi I have 3 questions: I have a RelativeLayout and a TableLayout as child, but I can't seem to get the TableLayout to center in the middle of the screen and in the Parent - RelativeLayout in this case. I've used android:layout_centerInParent="true" but that doesn't help... So Basically I want it to center horizontally and vertically in the screen. XML code <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertic (HowTos)