In the current implementation there is only a Toast shown when user selects already selected position, but it is not a very good atonement of this wrong selection.
Add small phone vibrations when the user clicks on the already selected position.
Keep or lose the toast, your call
In the current implementation there is only a Toast shown when user selects already selected position, but it is not a very good atonement of this wrong selection. Add small phone vibrations when the user clicks on the already selected position. Keep or lose the toast, your call