I am getting a JSONException complaining about a very deep nesting (more than 30). I know that the value is hardcoded in JSONWriter. what best can I do? use another library
You may ask yourself if such a deep nesting makes sense at all. Is it really needed? Maybe you could give us an example why you'd need such a deep nesting.
You don't say which JSON package you are using. It sounds like a defective one (org.json's default one? I almost wish it didn't exist) -- 30 is peanuts, absolutely should not cause problems. If you had thousands I could see why it could lead to problems, but 30 should be no problem. So consider switching the lib; usually you have many other issues if you hit into simple ones early on.