Spinner 관련해서 질문드립니다

Question

public class MainActivity extends Activity {
 
    Spinner depart_line;
    Spinner depart_station;
    Spinner arrive_line;
    Spinner arrive_station;
 
    ArrayAdapter<CharSequence> adapter1, adapter2, adapter3, adapter4;
 
    String Depart_station; // 출발역
    String Arrive_station; // 도착역
 
    String data;
    String data2;
    int token;
    String data3;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        StrictMode.enableDefaults();
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        final Spinner depart_line = (Spinner)findViewById(R.id.depart_line);
        final Spinner depart_station = (Spinner)findViewById(R.id.depart_station);
 
        adapter1 = ArrayAdapter.createFromResource(this, R.array.Line_depart, android.R.layout.simple_spinner_dropdown_item);
        adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        depart_line.setAdapter(adapter1);
 
        depart_line.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                if (adapter1.getItem(position).equals("1호선")){
                    adapter2 = ArrayAdapter.createFromResource(MainActivity.this, R.array.Line_1, android.R.layout.simple_spinner_dropdown_item);
                    adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                    depart_station.setAdapter(adapter2);
                    Depart_station = depart_station.getSelectedItem().toString();//출발역 반환
                }
                // 이하 생략
 
            }

에서 Depart_station 값이 계속 선택한 값이 아니라 다른값이 나오네요... 어떻게 해야 선택한 값으로 나타낼수 있을까요?? 알려주세요 ㅠㅠ