android中Json与对象及集合转化

 Gson是Goolge提供的用来Json和对象间转化的一个jar包，下面来看看简单例子
 
 1、对象与Json对象互转：
 
 

AutoRun autoRun = new AutoRun();
 autoRun.category = 0;
 autoRun.label = "测试";
 gson = new Gson();
 String s = gson.toJson(autoRun);
 Log.e("test", s);  //{"label":"测试","category":0,"maxValue":0,"minValue":0}
 autoRun = gson.fromJson(s, AutoRun.class);
 Log.e("test", autoRun.label); //测试 

 
 
 2、对象集合与Json对象互转：
 

 List<AutoRun> list = new ArrayList<AutoRun>();
 AutoRun autoRun = new AutoRun();
 autoRun.category = 0;
 autoRun.label = "测试";
 list.add(autoRun);
 AutoRun autoRun1 = new AutoRun();
 autoRun.category = 1;
 autoRun.label = "测试2";
 list.add(autoRun1);
 gson = new Gson();
 String s = gson.toJson(list);
 Log.e("test", s); //[{"label":"测试2","category":1,"maxValue":0,"minValue":0},{"category":0,"maxValue":0,"minValue":0}]
 list = gson.fromJson(s, new TypeToken<List<AutoRun>>() {}.getType());
 Log.e("test", list.get(0).label);  //测试

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