Communicating with pixels

[wdegler]

I have two related questions:

How can I write B4A code to

1. determine the coordinates of a touched pixel on the screen?

2. determine the pixel (its color) given its coordinates?

These are essentially opposite operations.

Any help will be greatly appreciated.

 

[NJDude]

I can help you with #1 (see attached project), the other one, I don't know if that's possible.

 

[wdegler]

Thanks, NJDude

Thanks. I have tried your sample app and find that it does exactly what I am looking for in question #1!
Please let me know if you ever get a clue about #2.

wdegler

 

[Jim]

Basic4android - Drawing (Core)

 

[wdegler]

Found it!

I found it, Jim. I have yet to try GetPixel. Thanks.