Not sure whether it is a simple typo but I couldn't help noticing that you had a field named "description" here.
jsonData = { attachment = "Eklenti 2"; describtion = "Aciklama 2 \U0131\U0130\U00f6\U00d6\U00e7\U00c7\U00fc\U00dc\U011f\U011e"; no = 002; row = 2; status = 1; subject = "Konu 2"; success = 1; title = "Arendi Android"; }
However in the final output, you were trying to get the value of a property named "description". If key is defined as "describtion", you can't find it by "description" and parser will return "null" as expected.
Hope it helps.