Parsing json in Android

Question

Can anyone send me link which has an example for parsing json in android with a detailed description?

Answer 1

http://senior.ceng.metu.edu.tr/2009/praeda/2009/01/11/a-simple-restful-client-at-android/

Answer 2

Parsing JSON in Java has already been done. I recomend using the Java JSON library that is posted on the JSON website.

I have used it a bunch and it is super simple and works great for me.

• Main Site
• Source
• License

This will do all of the hard parsing work for you, so you can just use the data.

Answer 3

Here's a quick example of how I would parse an array of JSON strings

Suppose your JSON looks like such:

[{"id":1,"delivery_id":1234},{"id":2,"delivery_id":34523},{"id":3,"delivery_id":9873}]

Here would be a quick function to build an Array of a objects we'll call "Messages" from the array of JSON messages:

      ArrayList<Messages> result = new ArrayList<Messages>();

      try {
          // this will break the JSON messages into an array
          JSONArray aryJSONStrings = new JSONArray(json);
          // loop through the array
          for (int i=0; i<aryJSONStrings.length(); i++) {
              Messages msgSum = new Messages();
              msgSum.setMessageId(aryJSONStrings.getJSONObject(i).getInt("id"));
              msgSum.setDeliveryId(aryJSONStrings.getJSONObject(i).getInt("delivery_id"));
              result.add(msgSum);
          }
       }
       catch (JSONException e) {
           Log.e("json", e.toString());
       }

Answer 4

I wrote a blog post a few months ago about building a simple http client dealing with JSON objects.

I also published my source code on GitHub.

Hope that helps.

Answer 5

There are also these libraries. I prefer Xstream personally because it hasn't ever crashed my app... I tried many of the others and occasionally got uncaught exceptions in the libraries.

http://code.google.com/p/google-gson/

http://jackson.codehaus.org/

http://www.softwaremonkey.org/Code/JsonParser

http://xstream.codehaus.org/json-tutorial.html

http://json-lib.sourceforge.net/

http://flexjson.sourceforge.net/