I am using Radio buttons as tab in my application.
I have loaded images for it, but they are aligning towards left side. how to make them align at center.
Try android:gravity="center"
in the xml for each RadioButton.
I see you're wrap_content, so theoretically that shouldn't do anything, but it looks like the icons are evenly divided, maybe the RadioGroup divides the space evenly so using android:gravity will have an effect.
Worth a shot I guess.
EDIT
Try this:
You will have to play with the android:marginLeft="20dp"
to get it properly centered, but that'll let you do what you're looking to do. I copied your layout and tested this time, so I know it works! :)