It's done, my first android application is released on the android marked.
She allow, as means his name, to create custom shortcut to call or send text message to a contact.
It's possible to choose the name and the icon of the shortcut in your picture !
An editor allow to select the part of a picture that you want select !
To create a shortcut, it's very easy, go on the desktop, do a long click or menu=>add, then shortcut. There you can select "Call Picture" !
If you update the contact number phone, the shortcut will be updated automatically !