Android: read JSON

Question

I'm trying to read from a url the following data:

{"to": "DKK", "rate": 7.4417, "from": "EUR"}

And I'm trying to read it with this code:

JSONObject obj = new JSONObject();
JSONObject obj2 = obj.getJSONObject(site);
String to = (String)obj2.get("to");
Double rate = obj2.getDouble("rate");

And I get the following error:

org.json.JSONException: No value for http://rate-exchange-1.appspot.com/currency?from=EUR&to=DKK
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at org.json.JSONObject.get(JSONObject.java:389)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at org.json.JSONObject.getJSONObject(JSONObject.java:609)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at com.converter.android.converter.ConvertActivity$Parse.doInBackground(ConvertActivity.java:1579)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at com.converter.android.converter.ConvertActivity$Parse.doInBackground(ConvertActivity.java:1547)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:295)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
04-22 23:06:56.114 19331-19991/com.converter.android.converter W/System.err:     at java.lang.Thread.run(Thread.java:818)

Can you please help me?

First download JSON response and then parse. You can't directly get JSON by providing its URL to JSONObject. — Sharjeel, Apr 22 '16 at 22:00

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

0

This is your problem, you can´t directly get a Json Object using the url, because isn´t a json object:

JSONObject obj2 = obj.getJSONObject(site);

You will check some examples here:

Android - download JSON file from url

Download the file and then you will use the getJSONObject() method.

edited May 23 '17 at 12:23

Community

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answered Apr 22 '16 at 22:09

Jorgesys

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and the solution is? – porthfind Apr 22 '16 at 22:10
See some examples here http://stackoverflow.com/questions/5027395/android-download-json-file-from-url to download your .json :) – Jorgesys Apr 22 '16 at 22:15

Android: read JSON

1 Answers1