Hi Alex,
Link for Api medic files :
https://github.com/priaid-eHealth/symptomchecker
It will have Java language within the folder, it will also have PHP as I've learnt in Line java is slightly harder to implement on B4A, so if PHP could be easily implemented that would be good.
Also it communicates via JSON/XML.
A little background on the app we're working on
- Symptom checker, to allow user to enter thier symptoms which would then be sent to APImedic to return a result on what the symptoms may be pointing to, generally it would just need to check if the person has dengue or not but I'm shooting for the extra mile here to provide some level of feedback on what they may have.