What is android:weightSum in android, and how does it work?

Question

I want to know: What is android:weightSum and layout weight, and how do they work?

Answer 1

If unspecified, the sum is computed by adding the layout_weight of all of the children. This can be used for instance to give a single child 50% of the total available space by giving it a layout_weight of 0.5 and setting the weightSum to 1.0. Must be a floating point value, such as "1.2"