[问答] Gson 解析空指针异常 这是GsonFormat自动生成的bean类publicclassCellDataBean{/***code:200*message:获取模块列表成功*success:true*data:[{"id":906,"name":"通风系统","sign":"ventilation_sys","hex_start":4,"model":[{"id":1168,"cell_id":906,"name":"风扇","unit":"","sign":"fan","hex_start":0,"data_type":"3","data_type_str":"布尔型"}]},{"id":908,"name":"照明系统","sign":"lighting_sys","hex_start":3,"model":[{"id":1169,"cell_id":908,"name":"照明灯","unit":"","sign":"floodlight","hex_start":0,"data_type":"3","data_type_str":"布尔型"}]},{"id":909,"name":"温湿度监测系统","sign":"temp_hum_det_system","hex_start":1,"model":[{"id":1170,"cell_id":909,"name":"温度","unit":"℃","sign":"temperature","hex_start":0,"data_type":"2","data_type_str":"浮点型"},{"id":1171,"cell_id":909,"name":"湿度","unit":"%","sign":"humidity","hex_start":1,"data_type":"1","data_type_str":"整数型"}]},{"id":910,"name":"烟雾监测系统","sign":"smoke_detection_sys","hex_start":0,"model":[{"id":1172,"cell_id":910,"name":"烟雾感知","unit":"","sign":"smoke","hex_start":0,"data_type":"2","data_type_str":"浮点型"}]},{"id":911,"name":"环境异常监测系统","sign":"abnormal_environ_sys","hex_start":2,"model":[{"id":1173,"cell_id":911,"name":"环境音","unit":"db","sign":"environmental_sound","hex_start":0,"data_type":"1","data_type_str":"整数型"}]}]*/privateintcode;privateStringmessage;privatebooleansuccess;privateList<DataBean>data;publicintgetCode(){returncode;}publicvoidsetCode(intcode){this.code=code;}publicStringgetMessage(){returnmessage;}publicvoidsetMessage(Stringmessage){this.message=message;}publicbooleanisSuccess(){returnsuccess;}publicvoidsetSuccess(booleansuccess){this.success=success;}publicList<DataBean>getData(){returndata;}publicvoidsetData(List<DataBean>data){this.data=data;}publicstaticclassDataBean{/***id:906*name:通风系统*sign:ventilation_sys*hex_start:4*model:[{"id":1168,"cell_id":906,"name":"风扇","unit":"","sign":"fan","hex_start":0,"data_type":"3","data_type_str":"布尔型"}]*/privateintid;privateStringname;privateStringsign;privateinthex_start;privateList<ModelBean>model;publicintgetId(){returnid;}publicvoidsetId(intid){this.id=id;}publicStringgetName(){returnname;}publicvoidsetName(Stringname){this.name=name;}publicStringgetSign(){returnsign;}publicvoidsetSign(Stringsign){this.sign=sign;}publicintgetHex_start(){returnhex_start;}publicvoidsetHex_start(inthex_start){this.hex_start=hex_start;}publicList<ModelBean>getModel(){returnmodel;}publicvoidsetModel(List<ModelBean>model){this.model=model;}publicstaticclassModelBean{/***id:1168*cell_id:906*name:风扇*unit:*sign:fan*hex_start:0*data_type:3*data_type_str:布尔型*/privateintid;privateintcell_id;privateStringname;privateStringunit;privateStringsign;privateinthex_start;privateStringdata_type;privateStringdata_type_str;publicintgetId(){returnid;}publicvoidsetId(intid){this.id=id;}publicintgetCell_id(){returncell_id;}publicvoidsetCell_id(intcell_id){this.cell_id=cell_id;}publicStringgetName(){returnname;}publicvoidsetName(Stringname){this.name=name;}publicStringgetUnit(){returnunit;}publicvoidsetUnit(Stringunit){this.unit=unit;}publicStringgetSign(){returnsign;}publicvoidsetSign(Stringsign){this.sign=sign;}publicintgetHex_start(){returnhex_start;}publicvoidsetHex_start(inthex_start){this.hex_start=hex_start;}publicStringgetData_type(){returndata_type;}publicvoidsetData_type(Stringdata_type){this.data_type=data_type;}publicStringgetData_type_str(){returndata_type_str;}publicvoidsetData_type_str(Stringdata_type_str){this.data_type_str=data_type_str;}}}}发个图片吧，图片是不是更容易看我一调用就出现这个错误
