public class deletedaily extends AsyncTask<Void , Void, long[]>{

        ProgressDialog pd;
        long resultdelete;
        protected void onPreExecute(){

                pd=new ProgressDialog(StockDetail.this);
                if(pd!=null){
                    pd.setMessage("Deleting data.....please wait");
                    pd.show();
                }


        }

        protected long[] doInBackground(Void... params) {
            // TODO Auto-generated method stub

            try{

            Database.getInstance(getApplicationContext()).getWritableDatabase().beginTransaction();
        resultdelete=   Database.getInstance(getApplicationContext()).getWritableDatabase().delete(st.tablename, st.column2 + "=? AND " + st.column3 + "=?", new String[] {getdailydate.toString(),stockname} );
            Database.getInstance(getApplicationContext()).getWritableDatabase().setTransactionSuccessful();

            new popdailydata().execute(); //here calling list view to populate after deletion
            }
            catch(Exception dailydeleteerror){}
            finally{
                Database.getInstance(getApplicationContext()).getWritableDatabase().endTransaction();
            }
            return new long[] {resultdelete};
        }


        protected void onPostExecute(long result){

            System.out.println("postexecute entered");
            if(pd!=null){
                pd.dismiss();
            }

            if(result!=-1){
                Toast.makeText(getApplicationContext(),"Date deleted from your portfolio", Toast.LENGTH_LONG).show();
            }
            else{
                Toast.makeText(getApplicationContext(),"Failed to delete ....try again", Toast.LENGTH_LONG).show();
            }
        }


    }