Brauche Hilfe beim Programmieren: beim Speichern in eine TXT Datei werden die alten Daten immer durch neue überschrieben

1private final String DATEINAME = "daten.txt";
2 private final String VERZEICHNISNAME = "daten";
3 private File verzeichnis;
4 private File datei;

1verzeichnis = getDir(VERZEICHNISNAME, MODE_PRIVATE);
2 datei = new File(verzeichnis, DATEINAME);

1public void saveStart(final View View) {
2 try {
3 FileOutputStream fileOut = new FileOutputStream(datei);
4 dateiSpeichern(fileOut);
5 Toast.makeText(this, "gespeichert", Toast.LENGTH_LONG).show();
6 } catch (FileNotFoundException e) {
7 e.printStackTrace();
8 }
9}
10 private void dateiSpeichern(FileOutputStream fileOut) {
11 OutputStreamWriter writer = new OutputStreamWriter(fileOut);
12 String text =
13 " **** Start block: " +
14 savename.getText().toString() +
15 " = " +
16 text_1.getText().toString() +
17 ": " +
18 text_2.getText().toString() +
19 "; " +
20 text_3.getText().toString() +
21 ": " +
22 text_4_ausgabe.getText().toString() +
23 "; " +
24 text_5.getText().toString() +
25 ": " +
26 text_6.getText().toString() +
27 "; " +
28 text_7.getText().toString() +
29 ": " +
30 text_8.getText().toString() + " :End block **** ";
31 try {
32 writer.write(text);
33 } catch (IOException e) {
34 e.printStackTrace();
35 }finally {
36 if (writer != null) {
37 try {
38 writer.close();
39 } catch (IOException e) {
40 e.printStackTrace();
41 }
42 }
43 }

1datei.exists()

1load.setText(text);

1public void loadStart(final View View) {
2 try {
3 FileInputStream fileIn = new FileInputStream(datei);
4 dateiLaden(fileIn);
5 } catch (FileNotFoundException e) {
6 e.printStackTrace();
7 }
8 }
9 private void dateiLaden(FileInputStream fileIn) {
10 BufferedReader fileInBuffer = new BufferedReader(new InputStreamReader(fileIn));
11 String text = "";
12 String zeile;
13 try {
14 while ((zeile = fileInBuffer.readLine()) != null) {
15 text += zeile;
16 }
17 } catch (IOException e) {
18 e.printStackTrace();
19 } finally {
20 try {
21 fileInBuffer.close();
22 } catch (IOException e) {
23 e.printStackTrace();
24 }
25 }
26 load.setText(text);
27 }