My app display a coordinate image and I want to place a dot on this pic based on two variables which represents the x and y location.
I have no idea how to achieve this purpose and don't know how to write the code, any one can help?
My app display a coordinate image and I want to place a dot on this pic based on two variables which represents the x and y location.
I have no idea how to achieve this purpose and don't know how to write the code, any one can help?