java.lang.illegalstateException：预期BEGIN_OBJECT但是BEGIN_ARRAY Retrofit

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我收到错误java.lang.illegalstateException：预期BEGIN_OBJECT但是在第1行第42列BEGIN_ARRAY时，Call API改装，这是我的代码：

这是我的界面：

@FormUrlEncoded
@POST("myCollection")
Call<APIResponse<List<MyCollection>>> getMyCollection(
        @Field("caller_id") String caller_id
);

这是电话：

public class UploadVideoToneActivity extends BaseActivity{
List<MyCollection> collection = new ArrayList<>();

 private void loadCollection() {

    ContactItem callerID = SessionManager.getProfile(this);
    Call<APIResponse<MyCollection>> call = ServicesFactory.getService().getMyCollection(callerID.caller_id);
    call.enqueue(new Callback<APIResponse<MyCollection>>() {
        @Override
        public void onResponse(Call<APIResponse<MyCollection>> call, Response<APIResponse<MyCollection>> response) {
            if (response.isSuccessful() && response.body().isSuccessful()) {
                List<MyCollection> data = (List<MyCollection>) response.body().data;
                if (data != null) {
                    collection.clear();
                    collection.addAll(data);
                    rvCollection.getAdapter().notifyDataSetChanged();
                }
            }
            else {
                Toast.makeText(UploadVideoToneActivity.this, response.errorBody().toString(), Toast.LENGTH_LONG).show();
            }
        }

        @Override
        public void onFailure(Call<APIResponse<MyCollection>> call, Throwable t) {
            Toast.makeText(UploadVideoToneActivity.this, t.getLocalizedMessage(), Toast.LENGTH_LONG).show();
        }
    });
}

这是来自API的格式JSON响应，这是来自API的格式JSON响应，

{
 "code": 200,
 "error_message": null,
 "data": [
    [
        {
            "caller_id": "44",
            "content_id": "003",
            "alias": "Eli Sugigi",
            "judul": "Angkat sekarang juga",
            "source_content": "http://bla.bla.mp4",
            "thumb_pic":  "http://bla.bla.mp4",
            "sub_start": "2017-12-27 14:17:10",
            "sub_end": "2018-01-03 00:00:00"
        }
    ],
    [
        {
            "caller_id": "44",
            "content_id": "002",
            "alias": "Eli Sugigi",
            "judul": "Mas Ganteng Angkat Dong",
            "source_content":"source_content": "http://bla.bla.mp4",
            "thumb_pic":  "http://bla.bla.mp4",
            "thumb_pic":"source_content": "http://bla.bla.mp4",
            "thumb_pic":  "http://bla.bla.mp4",
            "sub_start": "2017-12-27 15:52:40",
            "sub_end": "2018-01-03 00:00:00"
        }
     ]
    ]
   }

这是MyCollection类：

public class MyCollection implements Parcelable {
@SerializedName("content_id")
@Expose
public String content_id;
@SerializedName("alias")
@Expose
public String alias ;
@SerializedName("judul")
@Expose
public String judul;
@SerializedName("source_content")
@Expose
public String source_content;
@SerializedName("thumb_pic")
@Expose
public String thumb_pic;
@SerializedName("sub_start")
@Expose
public String sub_start ;
@SerializedName("sub_end")
@Expose
public String sub_end ;



protected MyCollection(Parcel in) {
    content_id = in.readString();
    alias = in.readString();
    judul = in.readString();
    source_content = in.readString();
    thumb_pic = in.readString();
    sub_start = in.readString();
    sub_end = in.readString();
}

public static final Creator<MyCollection> CREATOR = new Creator<MyCollection>() {
    @Override
    public MyCollection createFromParcel(Parcel in) {
        return new MyCollection(in);
    }

    @Override
    public MyCollection[] newArray(int size) {
        return new MyCollection[size];
    }
};

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(content_id);
    parcel.writeString(alias);
    parcel.writeString(judul);
    parcel.writeString(source_content);
    parcel.writeString(thumb_pic);
    parcel.writeString(sub_start);
    parcel.writeString(sub_end);
}
}
答案

首先，你提供的json是不正确的：

这是正确的json：

{
    "code": 200,
    "error_message": null,
    "data": [{
            "caller_id": "44",
            "content_id": "003",
            "alias": "Eli Sugigi",
            "judul": "Angkat sekarang juga",
            "source_content": "http://bla.bla.mp4",
            "thumb_pic": "http://bla.bla.mp4",
            "sub_start": "2017-12-27 14:17:10",
            "sub_end": "2018-01-03 00:00:00"
        },
        {
            "caller_id": "44",
            "content_id": "002",
            "alias": "Eli Sugigi",
            "judul": "Mas Ganteng Angkat Dong",
            "source_content": "http://bla.bla.mp4",
            "thumb_pic": "http://bla.bla.mp4",
            "sub_start": "2017-12-27 15:52:40",
            "sub_end": "2018-01-03 00:00:00"
        }
    ]
}

稍后您的响应类将其用作响应类：

public class MyResponseClass
{
    private String error_message;

    private ArrayList<Data> data;

    private String code;

    public String getError_message ()
    {
        return error_message;
    }

    public void setError_message (String error_message)
    {
        this.error_message = error_message;
    }

    public  ArrayList<Data> getData ()
    {
        return data;
    }

    public void setData ( ArrayList<Data> data)
    {
        this.data = data;
    }

    public String getCode ()
    {
        return code;
    }

    public void setCode (String code)
    {
        this.code = code;
    }

    @Override
    public String toString()
    {
        return "ClassPojo [error_message = "+error_message+", data = "+data+", code = "+code+"]";
    }
}

稍后使用此MyResponseData作为改装数据解析器：

ContactItem callerID = SessionManager.getProfile(this);
    Call<MyResponseData> call = ServicesFactory.getService().getMyCollection(callerID.caller_id);

并在你的onResponse：

@Override
        public void onResponse(Call<MyResponseData> call, Response<MyResponseData> response) {
            if (response.isSuccessful() && response.body().isSuccessful()) {
                //here collection will be arraylist of MyCollection class
                    collection.clear();
                    collection.addAll(response.body().getData());
                    rvCollection.getAdapter().notifyDataSetChanged();

            }
            else {
                Toast.makeText(UploadVideoToneActivity.this, response.errorBody().toString(), Toast.LENGTH_LONG).show();
            }
        }

测试它并在需要时进行微小的更改

另一答案

问题是你在“JSONArray”中得到了回应，而你正试图在JSONObject中收到回应。

您应该使用'List'作为getMyCollection(callerID.caller_id)方法的返回类型。然后实现该方法。

在onResponse方法中，您必须获得如下所示的列表

 List<MyCollection> data = (List<MyCollection>) response.body()

更新

你可以访问这里（http://pojo.sodhanalibrary.com/）

把你的JSON回复，然后按提交。你将获得Pojo类结构。

另一答案

尝试从APIResponse<MyCollection>更改为APIResponse<List<MyCollection>>

所以代码变成：

public class UploadVideoToneActivity extends BaseActivity{
List<MyCollection> collection = new ArrayList<>();

 private void loadCollection() {

    ContactItem callerID = SessionManager.getProfile(this);
    Call<APIResponse<List<MyCollection>>> call = ServicesFactory.getService().getMyCollection(callerID.caller_id);
    call.enqueue(new Callback<APIResponse<List<MyCollection>>>() {
        @Override
        public void onResponse(Call<APIResponse<List<MyCollection>>> call, Response<APIResponse<List<MyCollection>>> response) {
            if (response.isSuccessful() && response.body().isSuccessful()) {
                List<MyCollection> data = (List<MyCollection>) response.body().data;
                if (data != null) {
                    collection.clear();
                    collection.addAll(data);
                    rvCollection.getAdapter().notifyDataSetChanged();
                }
            }
            else {
                Toast.makeText(UploadVideoToneActivity.this, response.errorBody().toString(), Toast.LENGTH_LONG).show();
            }
        }

        @Override
        public void onFailure(Call<APIResponse<List<MyCollection>>> call, Throwable t) {
            Toast.makeText(UploadVideoToneActivity.this, t.getLocalizedMessage(), Toast.LENGTH_LONG).show();
        }
    });
}

还要将您的Json（部分）更新为：

"data": [{
            "caller_id": "44",
            "content_id": "003",
            "alias": "Eli Sugigi",
            "judul": "Angkat sekarang juga",
            "source_content": "http://bla.bla.mp4",
            "thumb_pic": "http://bla.bla.mp4",
            "sub_start": "2017-12-27 14:17:10",
            "sub_end": "2018-01-03 00:00:00"
        },
        {
            "caller_id": "44",
            "content_id": "002",
            "alias": "Eli Sugigi",
            "judul": "Mas Ganteng Angkat Dong",
            "source_content": "http://bla.bla.mp4",
            "thumb_pic": "http://bla.bla.mp4",
            "sub_start": "2017-12-27 15:52:40",
            "sub_end": "2018-01-03 00:00:00"
        }
    ]

希望能帮助到你！

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