Okey I'm starting to get annoyed by this..
pixmap.setPixel(0, 0, 0);
I finally come to write this code. The problem is that here is what it prints out.
I basically load the pixmap somewhere in the code and value at 0,0 happens to be 1915447807. The problem is that it doesn't change after I do setPixel(0, 0, 0). In second print statement, it should be 0, but it didn't change. Do I need to call some kind of method like pixmap.flush or pixmap.update for it to change?