错误是：
方法抛出'java.lang.NullPointerException'异常。无法评估pl.netizens.eonbeacon.storage.EonBeaconModel.toString（）
我尝试通过改造来解析JSON。我从服务器获得了JSON，如下所示：
{
"data": {
"list": [
{
"id": 58,
"beacon_id": "58",
"bridge_id": null,
"mesh_id": null,
"name": "eon_3c",
"location": "abcdlk",
"mac_address": "3c:cf:82:8a:e7:fe",
"firmware": "2.1",
"pcb_revision": "2.0",
"battery_level": "99",
"password": "0000",
"ib": {
"turn_on": "1",
"major": "33",
"minor": "344",
"tx_power": "7",
"interval": "400",
"uuid": "dae19960-18ea-11e5-8ff0-0002a5d5c521",
"secure_uuid": "0"
},
"euid": {
"turn_on": "0",
"namespace": null,
"instance": null,
"tx_power": null,
"interval": null
},
"eeid": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"eurl": {
"turn_on": "0",
"tx_power": null,
"interval": null,
"url": null
},
"etlm": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"assigned_bridge_id": null
},
{
"id": 56,
"beacon_id": "56",
"bridge_id": null,
"mesh_id": null,
"name": "Eon_e6",
"location": "test",
"mac_address": "e6:f5:8a:94:b8:c7",
"firmware": "2.1",
"pcb_revision": "2.0",
"battery_level": null,
"password": "0000",
"ib": {
"turn_on": "1",
"major": "2591",
"minor": "0",
"tx_power": "10",
"interval": "2593",
"uuid": "dae19960-18ea-11e5-8ff0-0002a5d5c521",
"secure_uuid": "0"
},
"euid": {
"turn_on": "0",
"namespace": null,
"instance": null,
"tx_power": null,
"interval": null
},
"eeid": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"eurl": {
"turn_on": "0",
"tx_power": null,
"interval": null,
"url": null
},
"etlm": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"assigned_bridge_id": null
},
{
"id": 57,
"beacon_id": "57",
"bridge_id": "13",
"mesh_id": "278",
"name": "Marta B",
"location": "lk",
"mac_address": "e1:4b:64:c3:80:e2",
"firmware": "2.1",
"pcb_revision": "2.0",
"battery_level": "97",
"password": "0000",
"ib": {
"turn_on": "1",
"major": "325",
"minor": "10",
"tx_power": "8",
"interval": "610",
"uuid": "dae19960-18ea-11e5-8ff0-0002a5d5c521",
"secure_uuid": "0"
},
"euid": {
"turn_on": "0",
"namespace": null,
"instance": null,
"tx_power": null,
"interval": null
},
"eeid": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"eurl": {
"turn_on": "0",
"tx_power": null,
"interval": null,
"url": null
},
"etlm": {
"turn_on": "0",
"tx_power": null,
"interval": null
},
"assigned_bridge_id": null
}
]
},
"ver": 1,
"time": 1475671202,
"status": 1,
"status_msg": ""
}
我的根响应类如下所示：
public class BasicResponse<T> {
@Expose
public T data;
@Expose
public int ver;
@Expose
public long time;
@Expose
public byte status;
@Expose
public String status_msg;
}
到那一刻，一切看起来都不错。现在，我尝试解析数据：
public class BeaconResponse {
@Expose
public int id;
@Expose
public long beacon_id;
@Expose
public long bridge_id;
@Expose
public long mesh_id;
@Expose
public String name;
@Expose
public String location;
@Expose
public String mac_address;
@Expose
public String firmware;
@Expose
public String pcb_revision;
@Expose
public byte battery_level;
@Expose
public String password;
@Expose
@SerializedName("ib")
public Ib ib;
@Expose
@SerializedName("euid")
public Euid euid;
@SerializedName("eeid")
@Expose
public Eeid eeid;
@SerializedName("eurl")
@Expose
public Eurl eurl;
@SerializedName("etlm")
@Expose
public Etlm etlm;
@Expose
public int assigned_bridge_id;
这里问题就出现了。一切都很好解析，除了对象 - euid，eeid，eurl，etlm，ib。当我改变他们的类名时，改造解析除了他们之外的一切都很好 - 他们是空的。当我更改类名以匹配JSON中的键时，我得到了改装错误。我使用了POJO，它创造了与我非常相似的类。知道问题出在哪里？ ：/
这是我的改装电话：
@Subscribe
public void getUserBeacons(GetBeaconsListCommand command) {
Callback<BasicResponse<BeaconsListResponse>> callback = new Callback<BasicResponse<BeaconsListResponse>>() {
@Override
public void success(BasicResponse<BeaconsListResponse> basicResponse, Response response) {
if (ResponseStatus.SUCCESS.statusCode == basicResponse.status)
EventBus.post(new BeaconsListFetchedEvent(basicResponse.data));
else
EventBus.post(new NetworkFailureEvent(ResponseStatus.getByStatus(basicResponse.status), basicResponse.status_msg));
}
@Override
public void failure(RetrofitError error) {
}
};
service.beaconsList(callback);
}
Euid，Eeid Models：
public class EuidModel extends Model {
@Expose
public boolean turn_on;
@Expose
public String namespace;
@Expose
public String instance;
@Expose
public int tx_power;
@Expose
public long interval;
public boolean isTurn_on() {
return turn_on;
}
public void setTurn_on(boolean turn_on) {
this.turn_on = turn_on;
}
public String getNamespace() {
return namespace;
}
public void setNamespace(String namespace) {
this.namespace = namespace;
}
public String getInstance() {
return instance;
}
public void setInstance(String instance) {
this.instance = instance;
}
public int getTx_power() {
return tx_power;
}
public void setTx_power(int tx_power) {
this.tx_power = tx_power;
}
public long getInterval() {
return interval;
}
public void setInterval(long interval) {
this.interval = interval;
}
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
public Map<String, Object> getAdditionalProperties() {
return this.additionalProperties;
}
public void setAdditionalProperty(String name, Object value) {
this.additionalProperties.put(name, value);
}
public class EeidModel extends Model {
@Column
public boolean turn_on;
@Column
public int tx_power;
@Column
public int interval;
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
public Map<String, Object> getAdditionalProperties() {
return this.additionalProperties;
}
public void setAdditionalProperty(String name, Object value) {
this.additionalProperties.put(name, value);
}
答案 0 :(得分：0)
尝试这个模型，我相信它会很好地工作： -
public class model {
private DataBean data;
private int ver;
private int time;
private int status;
private String status_msg;
public DataBean getData() {
return data;
}
public void setData(DataBean data) {
this.data = data;
}
public int getVer() {
return ver;
}
public void setVer(int ver) {
this.ver = ver;
}
public int getTime() {
return time;
}
public void setTime(int time) {
this.time = time;
}
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
public String getStatus_msg() {
return status_msg;
}
public void setStatus_msg(String status_msg) {
this.status_msg = status_msg;
}
private static class DataBean {
private List<ListBean> list;
public List<ListBean> getList() {
return list;
}
public void setList(List<ListBean> list) {
this.list = list;
}
static class ListBean {
private int id;
private String beacon_id;
private Object bridge_id;
private Object mesh_id;
private String name;
private String location;
private String mac_address;
private String firmware;
private String pcb_revision;
private String battery_level;
private String password;
private IbBean ib;
private EuidBean euid;
private EeidBean eeid;
private EurlBean eurl;
private EtlmBean etlm;
private Object assigned_bridge_id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getBeacon_id() {
return beacon_id;
}
public void setBeacon_id(String beacon_id) {
this.beacon_id = beacon_id;
}
public Object getBridge_id() {
return bridge_id;
}
public void setBridge_id(Object bridge_id) {
this.bridge_id = bridge_id;
}
public Object getMesh_id() {
return mesh_id;
}
public void setMesh_id(Object mesh_id) {
this.mesh_id = mesh_id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public String getMac_address() {
return mac_address;
}
public void setMac_address(String mac_address) {
this.mac_address = mac_address;
}
public String getFirmware() {
return firmware;
}
public void setFirmware(String firmware) {
this.firmware = firmware;
}
public String getPcb_revision() {
return pcb_revision;
}
public void setPcb_revision(String pcb_revision) {
this.pcb_revision = pcb_revision;
}
public String getBattery_level() {
return battery_level;
}
public void setBattery_level(String battery_level) {
this.battery_level = battery_level;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public IbBean getIb() {
return ib;
}
public void setIb(IbBean ib) {
this.ib = ib;
}
public EuidBean getEuid() {
return euid;
}
public void setEuid(EuidBean euid) {
this.euid = euid;
}
public EeidBean getEeid() {
return eeid;
}
public void setEeid(EeidBean eeid) {
this.eeid = eeid;
}
public EurlBean getEurl() {
return eurl;
}
public void setEurl(EurlBean eurl) {
this.eurl = eurl;
}
public EtlmBean getEtlm() {
return etlm;
}
public void setEtlm(EtlmBean etlm) {
this.etlm = etlm;
}
public Object getAssigned_bridge_id() {
return assigned_bridge_id;
}
public void setAssigned_bridge_id(Object assigned_bridge_id) {
this.assigned_bridge_id = assigned_bridge_id;
}
static class IbBean {
private String turn_on;
private String major;
private String minor;
private String tx_power;
private String interval;
private String uuid;
private String secure_uuid;
public String getTurn_on() {
return turn_on;
}
public void setTurn_on(String turn_on) {
this.turn_on = turn_on;
}
public String getMajor() {
return major;
}
public void setMajor(String major) {
this.major = major;
}
public String getMinor() {
return minor;
}
public void setMinor(String minor) {
this.minor = minor;
}
public String getTx_power() {
return tx_power;
}
public void setTx_power(String tx_power) {
this.tx_power = tx_power;
}
public String getInterval() {
return interval;
}
public void setInterval(String interval) {
this.interval = interval;
}
public String getUuid() {
return uuid;
}
public void setUuid(String uuid) {
this.uuid = uuid;
}
public String getSecure_uuid() {
return secure_uuid;
}
public void setSecure_uuid(String secure_uuid) {
this.secure_uuid = secure_uuid;
}
}
static class EuidBean {
private String turn_on;
private Object namespace;
private Object instance;
private Object tx_power;
private Object interval;
public String getTurn_on() {
return turn_on;
}
public void setTurn_on(String turn_on) {
this.turn_on = turn_on;
}
public Object getNamespace() {
return namespace;
}
public void setNamespace(Object namespace) {
this.namespace = namespace;
}
public Object getInstance() {
return instance;
}
public void setInstance(Object instance) {
this.instance = instance;
}
public Object getTx_power() {
return tx_power;
}
public void setTx_power(Object tx_power) {
this.tx_power = tx_power;
}
public Object getInterval() {
return interval;
}
public void setInterval(Object interval) {
this.interval = interval;
}
}
static class EeidBean {
private String turn_on;
private Object tx_power;
private Object interval;
public String getTurn_on() {
return turn_on;
}
public void setTurn_on(String turn_on) {
this.turn_on = turn_on;
}
public Object getTx_power() {
return tx_power;
}
public void setTx_power(Object tx_power) {
this.tx_power = tx_power;
}
public Object getInterval() {
return interval;
}
public void setInterval(Object interval) {
this.interval = interval;
}
}
static class EurlBean {
private String turn_on;
private Object tx_power;
private Object interval;
private Object url;
public String getTurn_on() {
return turn_on;
}
public void setTurn_on(String turn_on) {
this.turn_on = turn_on;
}
public Object getTx_power() {
return tx_power;
}
public void setTx_power(Object tx_power) {
this.tx_power = tx_power;
}
public Object getInterval() {
return interval;
}
public void setInterval(Object interval) {
this.interval = interval;
}
public Object getUrl() {
return url;
}
public void setUrl(Object url) {
this.url = url;
}
}
static class EtlmBean {
private String turn_on;
private Object tx_power;
private Object interval;
public String getTurn_on() {
return turn_on;
}
public void setTurn_on(String turn_on) {
this.turn_on = turn_on;
}
public Object getTx_power() {
return tx_power;
}
public void setTx_power(Object tx_power) {
this.tx_power = tx_power;
}
public Object getInterval() {
return interval;
}
public void setInterval(Object interval) {
this.interval = interval;
}
}
}
}
}