Android String to JSON Array Error

Question

I am parse json string in URL.

TextView tv3 = (TextView) findViewById(R.id.tv3);
TextView tv2 = (TextView) findViewById(R.id.tv2);
TextView tv1 = (TextView) findViewById(R.id.tv1);

String str = "[{\"ID\":\"1\",\"lat\":\"40.7646815\",\"lon\":\"29.030855\"},{\"ID\":\"2\",\"lat\":\"41.10812\",\"lon\":\"29.030855\"}]";


JSONArray jsonarray = null;
try {

    jsonarray = new JSONArray(str);
    for (int i = 0; i < jsonarray.length(); i++) {
        JSONObject obj = jsonarray.getJSONObject(i);

        String lat = obj.getString("lat");
        String lon = obj.getString("lon");
        String id = obj.getString("ID");

        tv3.setText(lat);
        tv2.setText(lon);
        tv1.setText(ID);
    }
} catch (JSONException e) {
    e.printStackTrace();
}

I want converting JSONArray to String but JSONArray returning empty. Where I'm Error ? Thank You..

@prudhvi do you not know how to escape quotes in java strings? — njzk2, May 02 '16 at 15:12

score 0 · Answer 1 · edited May 23 '17 at 12:07

0

Use JSONObject and JSONArray classes to construct JSONArray, instead of writing it as a String.

Refer https://stackoverflow.com/a/17810270/4586742

edited May 23 '17 at 12:07

Community

1
1

answered May 02 '16 at 15:04

Bob

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The JSON string is coming from a URL, if I understand the question correctly. – OneCricketeer May 02 '16 at 15:09

score 0 · Accepted Answer · answered May 02 '16 at 15:17

0

try this

jsonarray = new JSONArray(str.replace("\\\"", "\"").replace("\n","").replaceAll("^\"|\"$", "").trim());

answered May 02 '16 at 15:17

Rafael Mota

127
4

score -1 · Answer 3 · edited May 02 '16 at 14:31

-1

Try this :

JSONArray arrayObj = null;
JSONParser jsonParser = new JSONParser();
object = jsonParser.parse(str);
arrayObj = (JSONArray) object;

edited May 02 '16 at 14:31

Ben-J

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answered May 02 '16 at 14:30

yozzy

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where is this `JSONParser` class coming from? – njzk2 May 02 '16 at 15:14

Android String to JSON Array Error

3 Answers3