Android รบกวนสอบถามขอคำปรึกษา เรื่อง การใช้ while loop เพื่อเช็ค ข้อมูลที่ซ้ำกันใน listview หน่อยค่ะ

 try {
            //ปลายทาง

            mCursor = mDb.rawQuery("select bus.name,bus.id_bus, place.name_place, bus.picture from bus left join place_bus on place_bus.id_bus = bus.id_bus left  join  place  on place_bus.id_place = place.id_place where name_place =" + "\"" + message + "\"", null);//" + "\"" + message + "\""
            final ArrayList<String> dirArray = new ArrayList<String>();
            final ArrayList<String> dirArray3 = new ArrayList<String>();

            mCursor.moveToFirst();

            while (mCursor.isAfterLast() == false) {
                dirArray.add("ee " + mCursor.getString(mCursor.getColumnIndex(MyDatabase.COL_NAMEB)));
                dirArray3.add(mCursor.getString(mCursor.getColumnIndex(MyDatabase.COL_ID_BUS)));

                mCursor.moveToNext();

                    }


                if (dirArray.size()==0) {
                    Toast.makeText(context, "ไม่มีข้อมูลในฐานข้อมูล", Toast.LENGTH_SHORT).show();
                    textView.setText("****"+dirArray);
                }


                final ArrayAdapter<String> adapterDir = new ArrayAdapter<String>(getApplicationContext()
                        , android.R.layout.simple_list_item_1, dirArray);
                listView1.setAdapter(adapterDir);


                listView1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                        Intent newActivity = new Intent(getApplicationContext(), Detil_say1.class);
                        newActivity.putExtra("ID_BUS", dirArray3.get(position));
                        startActivity(newActivity);
                    }
                });


//select bus.name, place.name_place from bus left join place_bus on place_bus.id_bus = bus.id_bus left  join  place  on place_bus.id_place = place.id_place where
                //       name_place =
                //check ต้นทาง
           mCursor1 = mDb.rawQuery("select bus.name, place.name_place from bus left join place_bus on place_bus.id_bus = bus.id_bus left  join  place  on place_bus.id_place = place.id_place where name_place = " + "\"" + Name + "\"", null);
            final ArrayList<String> dirArray1 = new ArrayList<String>();
            final ArrayList<String> dirArray2 = new ArrayList<String>();//id ไปหน้า map เพื่อเปิดแผนที่

            mCursor1.moveToFirst();

            while (mCursor1.isAfterLast() == false) {
                dirArray1.add("ww" + mCursor1.getString(mCursor1.getColumnIndex(MyDatabase.COL_NAMEB)));
                dirArray2.add(mCursor1.getString(mCursor1.getColumnIndex(MyDatabase.COL_ID_BUS)));

                mCursor1.moveToNext();
            }

            if (dirArray1.size() == 0) {
                Toast.makeText(context, "ไม่มีข้อมูลในฐานข้อมูล", Toast.LENGTH_SHORT).show();
                textView.setText("ต้นทาง");
            }
                final ArrayAdapter<String> adapterDir1 = new ArrayAdapter<String>(getApplicationContext()
                        , android.R.layout.simple_list_item_1, dirArray1);
                listView2.setAdapter(adapterDir1);

                listView2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                        Intent newActivity = new Intent(getApplicationContext(), Detil_say2.class);
                        newActivity.putExtra("id_bus", dirArray2.get(position));
                        startActivity(newActivity);
                    }

                });


        } catch (Exception e) {
            //Toast.makeText(context, "No Data", Toast.LENGTH_SHORT).show();
        }