Question

Is this a TableLayout? If it is, how to make this underline under first row and different color per row?

Answer 1

Assuming it is derived from a ViewGroup (object containing children, for example TableLayout or ListView), it is easy to access all of its children (rows) and do something with it. For example alternating backgrounds:

final int childCount = myGroup.getChildCount();
for(int i = 0; i < childCount; i++) {
  View child = myGroup.getChildAt(i);
  if(i % 2 == 0) {
    child.setBackgroundColor(color1);
  } else {
    child.setBackgroundColor(color2);
  }
}

Same goes for changing the first row, just use myGroup.getChildAt(0) and modify that particular child.