How does android:layout_weight work?

Question

When I have the following, it shows top layout with four colors has much smaller area than the bottom layout area.

According to this documentation, when you add more

Answer 1

If you are using fill_parent in a LinearLayout the layout will take as much space as possible and all layout items defined later will have to deal with the space left.

If you set the height of both of you LinearLayouts to wrap_content the weight should work as documented.