JSONObject转换为String，API 10和API19中的结果不同

Question

I have the following code for convert a JSONObject into a StringEntity that I will send via a HTTP post request. This is working fine on an actual device with KITKAT, but when I try in the emulator with API10, I got an error from the server.

JSONObject jsonRequest = new JSONObject();
//filling the jsonRequest with data
System.out.println(jsonRequest.toString());
StringEntity se = new StringEntity(jsonRequest.toString());

I have realize that the way JSONObject#toString works is different in API10 and API19 and that is why the server is returning a 500 error. This is what the println outputs:

API19

{"expenses":[{"category":"660","attachment":{"data":"\/9j\/4...

API10

{"expenses":[{"category":"660","attachment":"{data=\/9j\/4...

Note the equals symbol(=) instead of colon (:) and the different position of the quotes (").

The json should look like

{
   "expenses":[
      {
         "category":"123",
         "attachment":{
            "data":"akcsdc...sdc"
         }
      }
   ]
}

Why is this happening? Is there a better way to do this?

Thanks.

Answer 1

Finally I found where the problem was, I was mapping the attachment object as a HashMap, I changed it to a JSONObject and now it works.

JSONObject jsonObj = new JSONObject();
Map<String, Object> attachmentMap = new HashMap<String, Object>();
attahmentMap.put("data", dataString);
jsonObj.put("attachment", attachmentMap);

Changed to

JSONObject jsonObj = new JSONObject();
JSONObject attachmentJson = new JSONObject();
attachmentJson.put("data", dataString);
jsonObj.put("attachment", attachmentJson);

Answer 2

Yes its going wrong when you convert it from HashMap. I used org.json.simple.JSONObject