how to display fetched json data into listview using baseadapter

Question

I am new to android and java.Recently I am having problem with displaying fetched json data into listview using baseadapter. At first I have used this code

Answer 1

In this example, I am connecting to Twitters public timeline JSON url.

package net.inchoo.demo.andy1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class HomeActivity extends ListActivity {

    /** Called when the activity is first created. */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        setListAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, this.fetchTwitterPublicTimeline()));        
    }

    public ArrayList fetchTwitterPublicTimeline()
    {
        ArrayList listItems = new ArrayList();

        try {
            URL twitter = new URL(
                    "http://twitter.com/statuses/public_timeline.json");
            URLConnection tc = twitter.openConnection();
            BufferedReader in = new BufferedReader(new InputStreamReader(
                    tc.getInputStream()));

            String line;
            while ((line = in.readLine()) != null) {
                JSONArray ja = new JSONArray(line);

                for (int i = 0; i < ja.length(); i++) {
                    JSONObject jo = (JSONObject) ja.get(i);
                    listItems.add(jo.getString("text"));
                }
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return listItems;
    }
}

Please direct your attention on the listItems.add(jo.getString(“text”)); line. This is the part that I am grabbing a “text” attribute/property of single JSON object. To get a more “visual” picture of all available attributes/properties you might want to take a look at the XML version of twitters public timeline. This way you will get nice colored XML in your browser, where you can see all available attributes.

Link: http://inchoo.net/dev-talk/android-development/simple-android-json-parsing-example-with-output-into-listactivity/