如何在android中使用putStringSet在共享首选项中存储多维数组？

Question

当我尝试使用shared preference

在putStringSet中保存数据时，此代码出错 请告诉我，我做错了。

我这样做：

 public void onReceive(Context arg0, Intent arg1) {
String[][] my_date;
    my_date = new String[][] {
            {"14","26"},
            {"12","16","24","27"},
            {"17"},
            {"8","13","18"},
            {"14"},
            {},
            {"29"},
            {"15","18"},
            {},
            {"2","3","6","8","23"},
            {"4","6","24"},
            {}
    };
   SharedPreferences pref = arg0.getSharedPreferences("MyPref", 0); // 0 - for private mode
    SharedPreferences.Editor editor = pref.edit();
    Set<String> myStrings = pref.**getStringSet**("my_date", new HashSet<String>());
                myStrings.add("Another string");
           editor.putStringSet("myStrings", myStrings);
           editor.commit();
}