{   
    "brandInfo":{ "brand":"品牌","model":"型号","deviceId":"0007A8947C62" } }

这是对象，用jsonObject解析

{
    "m2mAppVersion": "","devices": [ { "deviceId": "C00000000001","userId":"6553387","deviceName": "MaTest","deviceCategory": "0524","attr":{ "brand":"haier","model":"H_0.0.1" } },{ "deviceId": "C00000000001","model":"H_0.0.1" } } ] }

这是数组，devices有多个设备，不能用一个device对象表示，中括号本身就表示数组，这里也表示数组，用jsonArray解析