How to divide layout to 3 parts?

Question

I\'m trying to divide my layout to 3 equal rows, trying to use LinearLayout and weights, but it doesn\'t work, it doesn\'t make any change:

Answer 1

At first, I didn't realise, that problem was not there. I had ScrollView and it made these layouts not work with weights. I added android:fillViewport="true" to ScrollView and it got fixed.