xml파싱 결과창 질문이요ㅜㅜ

Question

public class MainActivity extends AppCompatActivity {

    TextView result;
    Button parse;
    ScrollView mScrollView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mScrollView = (ScrollView) findViewById(R.id.mScrollView);
        result = (TextView) findViewById(R.id.result);
        findViewById(R.id.parse).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                result.setText("");

                parser();

            }
        });
    }

    void parser() {

        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    String code = "", codeNm = "";
                    // XML 데이터를 읽어옴
                    URL url = new URL("http://api.nongsaro.go.kr/service/garden/ignSeasonList?apiKey=서비스키");
                    Log.d("hj", url.toString());
                    InputStream in = url.openStream();
                    

                    XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
                    XmlPullParser parser = factory.newPullParser();

                    // XmlPullParser에 XML 데이터와 인코딩 방식을 입력
                    parser.setInput(in, "utf-8");
                    
                    String tag = "";
                    int EventType = parser.getEventType();
                    boolean isItemTag = false;

                    while (EventType != XmlPullParser.END_DOCUMENT) {
                        
                        /*
                        * <tag> : START_TAG
                        * content : TEXT
                        * </tag> : END_TAG
                        */
                        if (EventType == XmlPullParser.START_TAG) {
                            tag = parser.getName();
                            
                            if (tag.equals("item")) isItemTag = true;

                        } else if (EventType == XmlPullParser.TEXT && isItemTag) {

                            if (tag.equals("code")){
                                code = parser.getText();

                            }

                            if (tag.equals("codeNm")){
                                codeNm = parser.getText();


                            }

                        } else if (EventType == XmlPullParser.END_TAG) {

                            if (tag.equals("item")) {
                                // 파싱한 데이터 사용 or 저장

                                isItemTag = false;

                            }
                        }
                        EventType = parser.next();
                    }

                } catch (Exception e) {
                    Toast.makeText(getApplicationContext(), " 실패", Toast.LENGTH_SHORT).show();
                    e.printStackTrace();
                }
            }
            });thread.start();


        }
}

Log.d했을 때 오류 없이 다 받아와지는데 결과창을 띄우면 화면에 아무것도 안나오는데... 왜그러는걸까요ㅠㅠ?