I’ve been asked to design a UI for a calculator application in Android using buttons. The GUI needs to be as in the image below-

The only issue I have is to stretch the ‘+’ cell across two rows, as shown in the picture.
I could simply assign a value to the layout_height to achieve this, but that would give me problems if the app is viewed on a different screen size.
Please help!
GridLayout allows you to span cells across rows as well as columns, plus, it can be filled Vertically or horizontally. You’d need a 6X5 grid, with different resolution images for different screens.