sorry, but this will not work…
Kodular apps not really are able to run in the background
see also the notes here Settings | Android Developers
Note: most applications should not use this; there are many facilities provided by the platform for applications to operate correctly in the various power saving modes. This is only for unusual applications that need to deeply control their own execution, at the potential expense of the user’s battery life. Note that these applications greatly run the risk of showing to the user as high power consumers on their device.