php - Proguard and Gson - Convert variable name inside arraylist -

in debug, code works fine. when release apk proguard 5, proguard offuscate variables, , when try "jsonify", resulting string offuscated, , so, php script doesn't understand anything.

here's code:

arraylist lcapturas=...;

if (lcapturas != null) {             gson gson = new gson();             type listofcapturaobject = new typetoken<list<captura>>() {             }.gettype();             json = gson.tojson(lcapturas, listofcapturaobject);         } 

and json string

[{"j":"2014-09-10 17:35:25","e":"2014-09-  10","f":"19.3641107,-99.1785061","d":28809,"c":85,"b":2705,"a":1,"l":1,"m":0}] 

i guess must proguard not offuscate captura objects. there way of disabling option? or how should do???

i resolved issue :

-keep class com.pkg.vo.myclass { *; } 

for each class need keep variable names.

stackoverflow didn't saved day :(