async task issue in json format

Question

i have a problem while im get the data from the server in text i can't converted into json object can not be converted into json array i just get the title and author from the database and show in list view

 {"document":[{"id":"1","title":"complete refrence of android", "author":"parag vyas","description":"lnvkzxhbkgbovdghognsdkhogjhlldnglj"}]}

plz help me

public class showalbooks extends Activity { ArrayList<String> mylist = new ArrayList<String>(); String returnString=""; ListView listView ; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.showalbooks); listView = (ListView) findViewById(R.id.mylist); new LongRunningGetIO().execute(); } private class LongRunningGetIO extends AsyncTask <Void, Void, String> { protected String getASCIIContentFromEntity(HttpEntity entity) throws IllegalStateException, IOException { InputStream in = entity.getContent(); StringBuffer out = new StringBuffer(); int n = 1; while (n>0) { byte[] b = new byte[4096]; n = in.read(b); if (n>0) out.append(new String(b, 0, n)); } return out.toString(); } @Override protected String doInBackground(Void... params) { HttpClient httpClient = new DefaultHttpClient(); HttpContext localContext = new BasicHttpContext(); HttpGet httpGet = new HttpGet("http://192.168.1.156/recess/document/document.json"); HttpClient client = new DefaultHttpClient(); HttpResponse response=null; try{ response = client.execute(httpGet); } catch(Exception e){} System.out.println(response.getStatusLine()); String text = null; try { response = httpClient.execute(httpGet, localContext); HttpEntity entity = response.getEntity(); text = getASCIIContentFromEntity(entity); } catch (Exception e) { return e.getLocalizedMessage(); } String var =text; try{ JSONArray jArray = new JSONArray(var); for(int i=0;i<jArray.length();i++){ JSONObject json_data = jArray.getJSONObject(i); Log.i("log_tag","id: "+json_data.getString("id")+ ", title: "+json_data.getString("title") ); returnString += "\n" +"id:"+ json_data.getString("id")+" "+"Title:"+ json_data.getString("title"); } } catch(JSONException e){ Log.e("log_tag", "Error parsing data "+e.toString()); } listView.setFilterText(returnString); return returnString; } protected void onPostExecute(String results) { if (results!=null) { listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View listview, int documentid, long documenttitle) { // TODO Auto-generated method stub } }); } }}}

MByD · Accepted Answer · 2012-05-14 13:37:03Z

1

The JSON array is enclosed by a JSON object, and has the id "document".

instead of:

JSONArray jArray = new JSONArray(var);

You should have:

JSONObject jObj = new JSONObject(var); JSONArray jArray = jObj.getJSONArray("document");

answered May 14, 2012 at 13:37

MByD

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3 Comments

Mohit Over a year ago

ya the half problem is resolved thanks binyamin sharet and plz can u solved my another problem that i only want title or author how can i filter and show in list view

MByD Over a year ago

This is not that clear, try solving it and if you fail to do so, you can ask another question in StackOverflow.

MByD Over a year ago

If the answer solved your problem, please accept it by clicking the tick (under the scores)

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