OK, thanks for the confirmation;

then as I said before, there are chances that it is not supported by your device (e.g. if it is a Tegra-based, like the Unity website mentions);

maybe it would be a good idea to check directly on the Unity 3D forum, as I presume you are not the only one experiencing problems with shadows in Unity on Android device.

yes exaclty ( sorry for my bad english ^^ )

OK, so are you seeing it correctly in PlayMode but not when running the APK on the device ?

or did I misunderstood ?

i fixed it :) 

my scene was too big in fact .... but when i export it in .apk for my android , in AR there is no self projected shadow.
 

Hi, if it is a Unity 3D related question, I would invite you to post it in the Unity section of our Forum;

One useful resource to read is this:

http://docs.unity3d.com/Documentation/Manual/Shadows.html

Among other things, the article above explains that shadows require Unity Pro license, and also that on some Android devices (with Tegra-based chips), shadows may not work.

In addition to that, shadows are affected by many settings, as explained in the Unity article above...

Which devices are you testing on?

Here are some instructions for setting up your scene to render shadows on a mobile device - http://forum.unity3d.com/threads/163782-Mobile-Shadows-Anyone-got-them-to-work

I'm using unity but i don't know why it didn't work ... in fact i have  a box win an extrude in it and she is an animation of rotation and there is no self shadow projected .... i don't understand why 

Hi, this is a fairly advanced topic in OpenGL programming;

of coure using Unity 3D would make your life much easier (as these kind of effects are provided out-of-the-box);

but if you want to do it natively, there are a few good tutorials about this subject in the internet; for example I found this one (but you can find many others):

http://blog.shayanjaved.com/2011/05/20/android-opengl-es-2-0-shadow-mapping/

I bump this subject because i need dynamic lighting for AR too