setting up onClick listener on a listView

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Android

i have populated listView with json data and have set an onClick listener to it. when i click on an item in the listView it should open up a new activity and show the item that was clicked.
but when i click on any item in the listView it always shows the first item in the list.

the code that i used is as follows

Adapter.java

private Activity activity;
    private static ArrayList prefrenceid,partnerid;
    private static LayoutInflater inflater = null;
    public Adapter(Activity a, ArrayList pref, ArrayList part) {
        activity = a;
        this.prefrenceid = pref;
        this.partnerid=part;


        inflater = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    @Override
    public int getCount() {
        return prefrenceid.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        if (convertView == null)
            vi = inflater.inflate(R.layout.adapter, null);

        TextView preferences = (TextView) vi.findViewById(R.id.textView43);
        String song = prefrenceid.get(position).toString();
        preferences.setText(song);


        TextView partner = (TextView) vi.findViewById(R.id.textView44);
        String song2 = partnerid.get(position).toString();
        partner.setText(song2);

        return vi;

    }/pre>



MainActivity.java

<pre lang="java">try {
                    Toast.makeText(getApplicationContext(), response, Toast.LENGTH_SHORT).show();
                    JSONObject obj3 = new JSONObject(response);
                    JSONArray jsonArray3 = obj3.getJSONArray("MyREST method");
                    int length3 = jsonArray3.length();
                    if (length3 != 0) {
                        for (int i = 0; i < length3; i++) {
                            JSONObject user3 = jsonArray3.getJSONObject(i);
                            offer_array.add(user3.getString("CITY").toString());
                            description_array.add(user3.getString("ZIP_CODE").toString());
                        }
                        adapter = new Adapter(MainActivity.this, offer_array, description_array);
                        listView.setAdapter(adapter);
                        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                            @Override
                            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                                String itemValue = ((TextView) findViewById(R.id.textView43)).getText().toString();
                                //String  itemValue    = (String) listView.getItemAtPosition(position);
                                Intent result = new Intent(getApplicationContext(), ResultClass.class);
                                result.putExtra("itemValue", itemValue);
                                startActivity(result);
                            }
                        });
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }