list集合存入sharedPreferences

最新推荐文章于 2024-09-03 16:29:08 发布

原创最新推荐文章于 2024-09-03 16:29:08 发布 · 412 阅读

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public static SharedPreferences sharedPreferences;
private SharedPreferences.Editor edit;
List<CarBean> carlist = new ArrayList<>();



sharedPreferences = getSharedPreferences("sp",MODE_PRIVATE);


 CarBean carBean = new CarBean(carnums, carids);

//存
                            carlist.add(carBean);

                            Gson gson = new Gson();
                            //转换成json数据，再保存
                           edit = sharedPreferences.edit();
                            String Json = gson.toJson(carlist);
                            edit.putString("carbean", Json);
                            edit.commit();
//取
  String carbean1 =sharedPreferences.getString("carbean", "");
        if (carbean1 != null) {
            Gson gson = new Gson();
            List<CarBean> datalist = gson.fromJson(carbean1, new TypeToken<List<CarBean>>() {
            }.getType());
            if (datalist!=null){
                carlist = datalist;

            }

        }