使用sharepreferce记录数组数据

 1  /**
 2         * 
 3         * sharepreference纪录news数据
 4         * 
 5         * 
 6         */
 7        private static final String   name="newsdata";
 8      
 9        
10      //保存
11        public void setDataList(String tag,List<News> datalist) {
12            SharedPreferences sp=mactivity.getSharedPreferences(name,Context.MODE_PRIVATE);
13                        if (null == datalist|| datalist.size() <= 0)
14                                return;
15 
16                        Gson gson = new Gson();
17                        String strJson = gson.toJson(datalist);
18                        sp.edit().putString(tag,strJson).commit();   
19                }
20        
21      
22        //获取
23       public List<News> getDataList(String tag) {
24           SharedPreferences sp=mactivity.getSharedPreferences(name,Context.MODE_PRIVATE);
25                        String strJson = sp.getString(tag, null);
26                        if (null == strJson) {
27                                return null;
28                        }
29                        Gson gson = new Gson();
30                        List<News> datalist= gson.fromJson(strJson,
31                                        new TypeToken<List<News>>() {
32                                        }.getType());
33                        return datalist;
34                }