[mauricesibrandi]

Hi,

I want my Series40 game to play Midi when possible, so what I did after browsing the forums, some tips on Google, etc is this.

I created a MidiPlayer class which looks like this:

import javax.microedition.media.*;

class MidiPlayer extends Object
{
// everything to open/play a midi file
}


in the game I do this:

try
{
Class.forName("javax.microedition.media.control.VolumeControl");
Class c = Class.forName("MidiPlayer");

Object media = c.newInstance();
((IMedia)media).init("test.mid");
((IMedia)media).play(1);
}
catch (ClassNotFoundException e)
{
System.out.println("no midi support");
}

I compile using the 3300 SDK so there is MMAPI in the classes.zip.


When I run this on the 3300 emulator everythings works fine. If I run it on the 7210 emulator or on a real phone it says "Cannot create class in the system package". It does that on the line Class.forName("javax.microedition.media.control.VolumeControl");

How come? Isn't the Class.forName check not suitable for this case? And if not, how should you determine wheter MMAPI is available.

If I leave out the code in the game, it will start on a 7210. So I guess the Class.forName succeeds because there are references to the VolumeControl, but I don't use them in MidiPlayer.


Maurice

[sampoy]

Im not sure, but "Cannot create class in a system package" could be generated because you import javax.microedition.media.* and the classloader does not find the package.

[mauricesibrandi]

That's what the Class.forName method should take care of but there is a problem with that method. (see http://discussion.forum.nokia.com/fo...threadid=31734)

Maurice