How can I store an integer array in SharedPreferences?

Question

I want to save/recall an integer array using SharedPreferences. Is this possible?

Answer 1

You can try to do it this way:

• Put your integers into a string, delimiting every int by a character, for example a comma, and then save them as a string:

  SharedPreferences prefs = getPreferences(MODE_PRIVATE);
  int[] list = new int[10];
  StringBuilder str = new StringBuilder();
  for (int i = 0; i < list.length; i++) {
      str.append(list[i]).append(",");
  }
  prefs.edit().putString("string", str.toString());
  

• Get the string and parse it using StringTokenizer:

  String savedString = prefs.getString("string", "");
  StringTokenizer st = new StringTokenizer(savedString, ",");
  int[] savedList = new int[10];
  for (int i = 0; i < 10; i++) {
      savedList[i] = Integer.parseInt(st.nextToken());
  }