How can i convert JSON data present in a URL into a JSON string in java or android?

Question

I tried the code in android below:-

        HttpClient httpClient = new DefaultHttpClient();
        HttpContext localContext = new BasicHttpContext();
        HttpGet httpGet = new HttpGet("http://echo.jsontest.com/key/value/one/two");
        String text = null;


        try {
            HttpResponse response = httpClient.execute(httpGet, localContext);

            HttpEntity entity = response.getEntity();

            text = getASCIIContentFromEntity(entity);
            JSONArray jsonObj = new JSONArray(entity);
            System.out.print("message is"+jsonObj);
           }
        catch (Exception e) {
            return e.getLocalizedMessage();
        }
        return text;

        //Below i am displaying in my layout in my emulator

        protected void onPostExecute(String results) {
         if (results!=null) {
            TextView et = (TextView)findViewById(R.id.data);
            et.setText(results);
         }

         Button b = (Button)findViewById(R.id.getvehicles);
         b.setClickable(true);
       }

so when i just use getASCIIContentFromEntity(entity) ,then i am able to print full JSON data as it is.but instead i wanna print only the values inside this URL it is JSON data,please open to see it .

How can i fetch the values inside this json URL?

Answer 1

Your response is in a JSONObject form so you have to get it like this.

HttpResponse response = httpClient.execute(httpGet, localContext);
HttpEntity entity = response.getEntity();
Object content = EntityUtils.toString(entity);
JSONObject jsonObj = new JSONObject(content.toString());

System.out.print("message is"+jsonObj.toString()); 

Then your JSONObject contains multiple values, you can get it by using the "key" of the pair.

String value = jsonObj.getString(key); //String value = jsonObj.getString("one");

In your case you want to print one and two, which means the kay and value, so you have to iterate the entire collection like this(If you know the keys used in the response no need of using this method).

Iterator<?> keys = jsonObj.keys();

     while( keys.hasNext() ){
          String key = (String)keys.next();
          System.out.print("key - value"+ key +   jsonObj.getString(key)); 
    }