public boolean tableIsExist(String tableName){
        boolean result = false;
        if(tableName == null){
                return false;
        }
        sqliteDatabase db = null;
        Cursor cursor = null;
        try {
                db = this.getReadableDatabase();
                String sql = "SELECT COUNT(*) as c FROM sqlite_master where type ='table' and name ='"+ tableName.trim()+"' ";
                cursor = db.rawQuery(sql,null);
                if(cursor.moveToNext()){
                        int count = cursor.getInt(0);
                        if(count>0){
                                result = true;
                        }
                }

        } catch (Exception e) {
            e.printStackTrace();
        }               
        return result;
}