package com.cookandroid.project8_1;


import java.io.FileInputStream; 임포트 몆개 생략


public class Project8_1Activity extends Activity {

 DatePicker dp;
 EditText edtDiary;
 Button btnWrite;
 String fileName;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  setTitle("간단 일기장");

  dp = (DatePicker) findViewById(R.id.datePicker1);
  edtDiary = (EditText) findViewById(R.id.edtDiary);
  btnWrite = (Button) findViewById(R.id.btnWrite);

  Calendar cal = Calendar.getInstance();
  int cYear = cal.get(Calendar.YEAR);
  int cMonth = cal.get(Calendar.MONTH);
  int cDay = cal.get(Calendar.DAY_OF_MONTH);

  dp.init(cYear, cMonth, cDay, new DatePicker.OnDateChangedListener() {
   public void onDateChanged(DatePicker view, int year,
     int monthOfYear, int dayOfMonth) {
    fileName = Integer.toString(year) + "_"
      + Integer.toString(monthOfYear + 1) + "_"
      + Integer.toString(dayOfMonth) + ".txt";
    String str = readDiary(fileName);
    edtDiary.setText(str);
    btnWrite.setEnabled(true);
   }
  });

  btnWrite.setOn C,, ,,l,, i, c,, k, Listener(new View.On C, l, ,i, c, kListener() {
   public void on C,, l,, i,, c,, k(View v) {
    try {
     FileOutputStream outFs = openFileOutput(fileName,
       Context.MODE_WORLD_WRITEABLE);
     String str = edtDiary.getText().toString();
     outFs.write(str.getBytes());
     outFs.close();
     Toast.makeText(getApplicationContext(),
       fileName + " 이 저장됨", 0).show();
    } catch (IOException e) {
    }
   }
  });

 }








 String readDiary(String fName) {  <----------- 이거 질문
  String diaryStr = null;
  FileInputStream inFs;
  try {
   inFs = openFileInput(fName);
   byte[] txt = new byte[500];
   inFs.read(txt);
   inFs.close();
   diaryStr = (new String(txt)).trim();
   btnWrite.setText("수정 하기");
  } catch (IOException e) {
   edtDiary.setHint("일기 없음");
   btnWrite.setText("새로 저장");
  }
  return diaryStr;
 }
}



도데체  readDiary 는 누가 호출을 하는 거냐.

캘린더 날짜를 회전하면 자동으로 readDiary 를 호출하는 것 같은데, xml 에도 없고 *.java에도 호출하는 코드가 없다.

그냥 예약어 인가?