我正在使用翻新来处理对Android应用程序的API的调用。我正在尝试让Retrofit处理JSON的解析,并根据我创建的POJO创建对象列表。
我收到的错误是“ com.google.gson.JsonSyntaxException:java.lang.IllegalStateException:预期为字符串,但在第1行第176列为BEGIN_OBJECT”。
我使用JsonSchema2Pojo生成了我的java类。这些类和关联的JSON如下。
{"status":"success","data":[{"sort_key":1,"event_id":1947357,"title":"2014 US Open Tennis Session 15 (Mens\/Womens Round of 16)","datetime_utc":"2014-09-01T15:00:00","venue":{"city":"Flushing","name":"Louis Armstrong Stadium","extended_address":"Flushing, NY 11368","url":"https:\/\/seatgeek.com\/venues\/louis-armstrong-stadium\/tickets\/?aid=10918","country":"US","display_location":"Flushing, NY","links":[],"slug":"louis-armstrong-stadium","state":"NY","score":0.73523,"postal_code":"11368","location":{"lat":40.7636,"lon":-73.83},"address":"1 Flushing Meadows Corona Park Road","timezone":"America\/New_York","id":2979},"images":["https:\/\/chairnerd.global.ssl.fastly.net\/images\/performers-landscape\/us-open-tennis-45e2d9\/5702\/huge.jpg","https:\/\/chairnerd.global.ssl.fastly.net\/images\/performers\/5702\/us-open-tennis-c1ccf7\/medium.jpg","https:\/\/chairnerd.global.ssl.fastly.net\/images\/performers\/5702\/us-open-tennis-01f513\/large.jpg","https:\/\/chairnerd.global.ssl.fastly.net\/images\/performers\/5702\/us-open-tennis-4e07f2\/small.jpg"]}
据此,我认为我需要生成3个POJO,我的更高级别的“ EventObject”类,A Location Location类和Venue类。这些类及其变量如下:
EventObject类别:
public class EventObject {
private Integer sortKey;
private Integer eventId;
private String title;
private String datetimeUtc;
private Venue venue;
private List<String> images = new ArrayList<String>();
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
位置类别:
public class Location {
private Float lat;
private Float lon;
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
场地类别:
public class Venue {
private String city;
private String name;
private String extendedAddress;
private String url;
private String country;
private String displayLocation;
private List<Object> links = new ArrayList<Object>();
private String slug;
private String state;
private Float score;
private String postalCode;
private Location location;
private String address;
private String timezone;
private Integer id;
private Map<String, Object> additionalProperties = new HashMap<String, Object>();
我的Api通话界面如下:
public interface UserEvents {
@GET("/user/get_events")
void getEvents(@Header("Authorization")String token_id,
@Query("event_type")String event_type,
@Query("postal_code")int postalCode,
@Query("per_page") int perPage ,
@Query("lat") int lat,
@Query("lon") int lon,
@Query("month")int month,
@Query("page")int page,
Callback<List<EventObject>>callback) ;
}
这是我的代码中的实现:
UserEvents mUserEvents = mRestAdapter.create(UserEvents.class);
mUserEvents.getEvents(token_Id, "sports",11209,25,0, 0, 9, 2, new Callback <List<EventObject>>() {
@Override
public void success(List<EventObject> eventObjects, retrofit.client.Response response) {
Log.d(TAG,"Success");
}
这里发生了很多事情,但是我相信我处理JSON的方式可能出错。当我将JSON复制并粘贴到Pojo生成器时,我没有包含“ status:success”数据:{
实际上,我实际上只是使用了Array中某个元素的整个条目(从{sort_key到下一个sort key的所有内容),并将其通过转换器。
这是我对Retrofit和API的首次尝试,并且解析任何复杂的东西。我希望其他人能够指出这一点。我也用谷歌搜索,没有运气就可以解决这个问题。
感谢您的光临。
主要问题是您没有获得响应的根元素。您需要创建一个实体“响应”,以获取项目状态和数据。它看起来像这样:
public class RootObject {
@Expose
private String status;
@Expose
private EventObject data;
//getters and setters here
}
然后,当您进行回调时,您应该指向RootObject, mUserEvents.getEvents(token_Id, "sports",11209,25,0, 0, 9, 2, new Callback <RootObject>()
还有一件事,Retrofit使用GSON解析您的json响应。这意味着在创建实体时,变量需要匹配响应中出现的对象的名称。如果不是,则需要告诉GSON如何映射变量,如下所示:
@SerializedName("extended_address")
@Expose
private String extendedAddress;
在这种情况下,json中的值是“ extended_address”,并将被映射到字符串ExtendedAddress。如果您不放置该@SerializedName
行,则解析将失败。如果要跳过该行,则可以调用变量“ extended_address”,使其与响应匹配。
的@Expose
是通过GSON需要来解析它下面的变量。如果没有变量,则GSON将忽略该解析。因此,您需要同时对@Expose
和进行修复,@SerializedName
以便GSON正常工作。
希望能帮助到你。
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