Android parsing Json error

I having an error while parsing json array in my android application.

My json object is in the following form: {"post":[ [{"0":"all the best to every one...!!","post":"all the best to every one...!!"}, {"0":"hello every one...","post":"hello every one..."}] ]}

My java file in android is as follows:

public class Newsactivity extends ListActivity {

private static final String TAG_SUCCESS = "";

private ProgressDialog pDialog;


JSONParser jParser = new JSONParser();

ArrayList<HashMap<String, String>> postsList;


private static String url_all_products = "myurl";


private static final String TAG_POST = "post";



JSONArray posts = null;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.allposts);


    postsList = new ArrayList<HashMap<String, String>>();


    new LoadAllProducts().execute();


    ListView lv = getListView();


}





    class LoadAllProducts extends AsyncTask<String, String, String> {


        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(Newsactivity.this);
            pDialog.setMessage("Loading posts. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
            pDialog.show();
        }


        protected String doInBackground(String... args) {

            List<NameValuePair> params = new ArrayList<NameValuePair>();

            JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);


            Log.d("All Posts: ", json.toString());

            try {

                    posts = json.getJSONArray(TAG_POST);


                    for (int i = 0; i < posts.length(); i++) {
                        JSONObject c = posts.getJSONObject(i);


                       String post = c.getString(TAG_POST);

                        HashMap<String,String> map = new HashMap<String,String>();


                        map.put(TAG_POST, post);

                        postsList.add(map);
                    }

            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }


        protected void onPostExecute(String file_url) {

            pDialog.dismiss();

            runOnUiThread(new Runnable() {
                public void run() {

                    ListAdapter adapter = new SimpleAdapter(
                            Newsactivity.this, postsList,
                            R.layout.singlepost, new String[] { TAG_POST},
                            new int[] { R.id.pid});

                    setListAdapter(adapter);
                }
            });

        }

    }







@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_newsactivity, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();


    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

}

I am getting a fatal exception starting this activity. This code is modified code of an online tutorial on json parsing. As I am new to android I am unable to find where the id is. So, please help me. Thank you.