not all nokia phones can handle simulateous key presses...
I saw a nokia comment about it in a game programming .pdf document...

lnx

has someone access to this resolution?

thanx

lnx

you can download images using HTTPConnection...
then you have 2 possibilities:
1. download each time the user starts the game...
2. store downloaded images to RecordStore - the only persistent...

I have seen only midlets that use FullCanvas to have no problems with flicker-free (fullscreen) graphics. Maybe in FullCanvas implementation they solved this vertical retrace synchronisation...

1. Does anyone know or is it in specification (or referential MIDP implementation) how much heap I need for loading an png palette based image? For example with image 200x200 pixels (= 40000 bytes...

I have the same problem...
I think it is a firmware bug - my fw: 3.16...

lnx

I had the same problem....
I'm using retroguard (with JBuilder) - and there is one point:
after obfuscation I must extract the jar file and make preverify of all obfuscated classes! the preverifier...

usefull batch png optimizer is Pngcrush (http://pmt.sourceforge.net/pngcrush/).

it tries to repack image data with different algorithm parameters and can remove all chunks you don't need (text,...