how to autostart android app with boot

I am now trying made a game with autostart with boot. I know how to made startup with java SDK do it.
http://www.e-nature.ch/tech/android-sdk-add-application-to-the-autostart/

but I don't know is there any shortcut to made Android app bulid with unity autostart,

Now I have to made another app made with JDK service to invoke unity game after boot. so it need install two apps too complex to users.