Android之SharedPreference存储一个对象

思路是采用把对象转化成json

需要Gson的gradle

compile 'com.google.code.gson:gson:2.6.2'

把对象转化成json，我这里是List<Object>

Gson gson = new Gson();
String json = gson.toJson(list)

存储string

getSharedPreferences("item_name_list",Context.MODE_PRIVATE)
.edit()
.putString("item_name_list", json)
.apply();

获取string

String listJson = getSharedPreferences("item_name_list", Context.MODE_PRIVATE).getString("item_name_list", "");

查看string格式

[{"layoutId":2131296285},{"a":"日常心理学","b":false,"layoutId":0},{"a":"用户推荐日报","b":false,"layoutId":0},{"a":"电影日报","b":false,"layoutId":0},{"a":"不许无聊","b":false,"layoutId":0},{"a":"设计日报","b":false,"layoutId":0},{"a":"大公司日报","b":false,"layoutId":0},{"a":"财经日报","b":false,"layoutId":0},{"a":"互联网安全","b":false,"layoutId":0},{"a":"开始游戏","b":false,"layoutId":0},{"a":"音乐日报","b":false,"layoutId":0},{"a":"动漫日报","b":false,"layoutId":0},{"a":"体育日报","b":false,"layoutId":0}]

可以直接采用Gson解析成Bean，我这里采用的阿里巴巴解析json的jar包灵活地解析（为了不创建javabean）

list.add(new Bean0().setLayoutId(R.layout.item_left_rv_home_page));
JSONArray array = JSONArray.parseArray(listJson);
for (int i = 1; i < array.size(); i ++) {
JSONObject o = array.getJSONObject(i);
list.add(new Bean2(o.get("a"), o.get("b")).setLayoutId(R.layout.item_left_rv));
}