안드로이드 스튜디오 개발 중 (내부저장소이용) 막히는 부분이 있어 질문합니다. (소스 있어요) [closed]

Question

내부저장소를 이용하여 저장하고 불러오는 소스를 개발하였습니다.

우선, 소스를 먼저 보여드리겠습니다.

 

MainActivity.java

public class MainActivity extends AppCompatActivity {

    EditText an_Check_1, an_Check_2, an_Check_3, an_Check_4, an_Check_5;

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

        an_Check_1 = (EditText) findViewById(R.id.an_check_1);
        an_Check_2 = (EditText) findViewById(R.id.an_check_2);
        an_Check_3 = (EditText) findViewById(R.id.an_check_3);
        an_Check_4 = (EditText) findViewById(R.id.an_check_4);
        an_Check_5 = (EditText) findViewById(R.id.an_check_5);

    }

    public void save(View view){

        String an_Check1 = an_Check_1.getText().toString();
        String an_Check2 = an_Check_2.getText().toString();
        String an_Check3 = an_Check_3.getText().toString();
        String an_Check4 = an_Check_4.getText().toString();
        String an_Check5 = an_Check_5.getText().toString();

        File file = null;

        an_Check1 = an_Check1+" ";
        an_Check2 = an_Check2+" ";
        an_Check3 = an_Check3+" ";
        an_Check4 = an_Check4+" ";
        an_Check5 = an_Check5+" ";

        FileOutputStream fileOutputStream =  null;

        try {
            file = getFilesDir();
            fileOutputStream = openFileOutput("anda.txt", Context.MODE_PRIVATE);
            fileOutputStream.write(an_Check1.getBytes());
            fileOutputStream.write(an_Check2.getBytes());
            fileOutputStream.write(an_Check3.getBytes());
            fileOutputStream.write(an_Check4.getBytes());
            fileOutputStream.write(an_Check5.getBytes());

        } catch (IOException e) {
            Log.d("anda", e.toString());
        }
        finally {
            try {
                fileOutputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        Toast.makeText(this, "Saved successfully"+file+"/anda.txt ", Toast.LENGTH_LONG).show();
    }

    public void next(View view){
        Toast.makeText(this, "Data page", Toast.LENGTH_LONG).show();
        Intent intent = new Intent(this, DBActivity.class);
        startActivity(intent);
    }

}

 

DBActivity.java

public class DBActivity extends AppCompatActivity {

    TextView an_Check_1, an_Check_2, an_Check_3, an_Check_4, an_Check_5;

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

        an_Check_1 = (TextView)findViewById(R.id.an_txt_1);
        an_Check_2 = (TextView)findViewById(R.id.an_txt_2);
        an_Check_3 = (TextView)findViewById(R.id.an_txt_3);
        an_Check_4 = (TextView)findViewById(R.id.an_txt_4);
        an_Check_5 = (TextView)findViewById(R.id.an_txt_5);
    }

    public void Show(View view){

        try {
            FileInputStream  fileInputStream = openFileInput("anda.txt");
            int read = 1;
            StringBuffer buffer = new StringBuffer();
            while( (read = fileInputStream.read()) != 1 ){
                buffer.append((char)read);
            }
            Log.d(buffer.toString(), "anda");

            String m = buffer.toString();

            String[] data = m.split(" ");

            String an_Check1 = data[0];
            String an_Check2 = data[1];
            String an_Check3 = data[2];
            String an_Check4 = data[3];
            String an_Check5 = data[4];

            an_Check_1.setText(an_Check1);
            an_Check_2.setText(an_Check2);
            an_Check_3.setText(an_Check3);
            an_Check_4.setText(an_Check4);
            an_Check_5.setText(an_Check5);

 

 

        } catch (FileNotFoundException e) {
            Toast.makeText(this, "FileNotFound", Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Toast.makeText(this, "Data found", Toast.LENGTH_LONG).show();
    }

    public void back(View view){
        Toast.makeText(this, "Main Page", Toast.LENGTH_LONG).show();
        Intent intent = new Intent(this, MainActivity.class);
        startActivity(intent);
    }
}

 

이런 식으로 데이터를 입력하여 다른 화면에서 저장한 내용을 불러와 보일 수 있도록 코드를 짜보았습니다.

(오류 없는 상태이며 잘 돌아가는 소스입니다..)

저는 여기서 더 나아가 데이터를 하나만 입력하고 저장 후 다음 화면에서도 저장된 갯수만큼 보여지고 싶습니다. 어떤 식으로 수정을 해야할까요?? 도와주십시오!!