[kartu]

m-land
Good start.

My feedback:

• Don't focus on how keyboards will be loaded, this is still tbd.
• Avoid having business logic in xml files (doMark).
• Try to avoid target.bla =, preferably define dummy function and expose only public stuff. (check existing prs+ code for examples)
• Don't expose vk internals, nobody should be able to directly push something into its arrays.
• Letters need to be bigger and a bit more squarish (vertical size closer to horizontal).
• Column indices are missing
• tab labels might have fixed size, but not the same as letters, switching between them should be by using some key (uhm, say "holding numeric button", tbd)
• A bit more comments in the code would be nice...
• I'd dream about dynamic column number. (sudoku has code that is resizing/moving stuff around)
• Would be nice to have colored stripes mildly highlighting rows/columns
• Keep in mind, that eventually VK group will land in main.xml