Welcome,
This is not really an intended/supported feature of OpenEars, so I don’t really recommend it and can’t offer support assistance, but it is possible using the APIs which are intended for testing found in OEPocketsphinxController. If you take a look in the docs or header for the APIs beginning with runRecognitionOnWavFileAtPath and pathToTestFile, you can learn more about how this would work. This isn’t going to give identical results to your android code. Good luck!