List<String> list = new ArrayList<String>();
Gson gson = new Gson();
String data = gson.toJson(list);
sp.putString("listStr", data);
解析獲取List集合
String data = sp.getString("listStr", "");
Gson gson = new Gson();
Type listType = new TypeToken<List<String>>() {
}.getType();
List<String> list = gson.fromJson(data, listType);
