1     public static void saveDataToPrivateFile(Context context, String data, int mode, String fileName) {

 2         FileOutputStream fileOutputStream = null;

 3         BufferedWriter bufferedWriter = null;

 4

 5         try {

 6             fileOutputStream = context.openFileOutput(fileName, mode);

 7             bufferedWriter = new BufferedWriter(new OutputStreamWriter(fileOutputStream));

 8             bufferedWriter.write(data);

 9         } catch (IOException e) {

10             e.printStackTrace();

11         } finally {

12             try {

13                 if (bufferedWriter != null) {

14                     bufferedWriter.close();

15                 }

16             } catch (IOException e) {

17                 e.printStackTrace();

18             }

19         }

20     }

21

22     public static String loadDataFromPrivateFile(Context context, String fileName) {

23         FileInputStream fileInputStream = null;

24         BufferedReader bufferedReader = null;

25         StringBuilder stringBuilder = new StringBuilder();

26

27         try {

28             fileInputStream = context.openFileInput(fileName);

29             bufferedReader = new BufferedReader(new InputStreamReader(fileInputStream));

30             String result = "";

31             while ((result = bufferedReader.readLine()) != null) {

32                 stringBuilder.append(result);

33             }

34         } catch (IOException e) {

35             e.printStackTrace();

36         } finally {

37             if (bufferedReader != null) {

38                 try {

39                     bufferedReader.close();

40                 } catch (IOException e) {

41                     e.printStackTrace();

42                 }

43             }

44         }

45

46         return stringBuilder.toString();

47     }

48

49     public static boolean deletePrivateFile(Context context, String fileName) {

50         try {

51             return context.deleteFile(fileName);

52         } catch (Exception e) {

53             e.printStackTrace();

54             return false;

55         }

56     }