使用sharepreferce记录数组数据

使用sharepreferce记录数组数据

 /**
        * 
        * sharepreference纪录news数据
        * 
        * 
        */
       private static final String   name="newsdata";
     
       
     //保存
       public void setDataList(String tag,List<News> datalist) {
           SharedPreferences sp=mactivity.getSharedPreferences(name,Context.MODE_PRIVATE);
                       if (null == datalist|| datalist.size() <= 0)
                               return;

                       Gson gson = new Gson();
                       String strJson = gson.toJson(datalist);
                       sp.edit().putString(tag,strJson).commit();   
               }
       
     
       //获取
      public List<News> getDataList(String tag) {
          SharedPreferences sp=mactivity.getSharedPreferences(name,Context.MODE_PRIVATE);
                       String strJson = sp.getString(tag, null);
                       if (null == strJson) {
                               return null;
                       }
                       Gson gson = new Gson();
                       List<News> datalist= gson.fromJson(strJson,
                                       new TypeToken<List<News>>() {
                                       }.getType());
                       return datalist;
               }