use volume key in app

Question

Hi how can i use volume keys and camera key in app ? i use -36 and - 37 constant value but it`s not work !!! i use this to get key name

str = getKeyName(keyCode);

but when i press volume keys or camera key it`s return null can any body help me thanks

Answer 1

On what platform? What kind of keyboard? This is an implementation-specific question; there's no standardized keycode for a volume key as it's not part of the standard 101- or 104-key layouts. (And even then, keycodes vary between countries and languages.)

Answer 2

It's very, very rare that mobile phones allow MIDlets to get access to such buttons as volume and camera.

If your mobile phone supports this, it should call function keyPressed(int keyCode) of Canvas. If you somehow output the code, you will be able to use it.

I'll say once again that it's very rare, and if some mobile phone supports the keys, others won't.