java.lang.IllegalStateException：应为 BEGIN_OBJECT 但在第 1 行第 2 列路径 $ 处为 BEGIN_ARRAY

Question

我是 Retrofit 的新手。以下是我获取供应商列表的代码

示例 JSON 响应是 json 数组而不是 json 对象

[
{
"Key" : "1",
"Value" : "xyz"
},
{
"Key" : "2",
"Value" : "abc"
}
]

下面是我的代码

private void callToRetrofit() {
    ApiInterface apiInterface = ApiClient.getApiClient()
            .create(ApiInterface.class);
    Call<List<SD_Checklist_Supplier_Model>> call = apiInterface.getVendors();
    call.enqueue(new Callback<List<SD_Checklist_Supplier_Model>>() {
        @Override
        public void onResponse(Call<List<SD_Checklist_Supplier_Model>> call, Response<List<SD_Checklist_Supplier_Model>> response) {
            Log.v("onResponse", " : ok" +  response == null ? " null" : "okkkk" + response.toString());
        }

        @Override
        public void onFailure(Call<List<SD_Checklist_Supplier_Model>> call, Throwable t) {
            Log.v("onFailure", " : " + t.toString());
        }
    });
}

模型类

public class SD_Checklist_Supplier_Model {

    @SerializedName("Key")
    private String supplierID;
    @SerializedName("Value")
    private String supplierName;
    private boolean isSupplierSelected;

    public String getSupplierID() {
        return supplierID;
    }

    public void setSupplierID(String supplierID) {
        this.supplierID = supplierID;
    }

    public String getSupplierName() {
        return supplierName;
    }

    public void setSupplierName(String supplierName) {
        this.supplierName = supplierName;
    }

    public boolean isSupplierSelected() {
        return isSupplierSelected;
    }

    public void setSupplierSelected(boolean supplierSelected) {
        isSupplierSelected = supplierSelected;
    }
}

目前，我得到了

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: 预期为 BEGIN_OBJECT，但在第 1 行第 2 列路径 $ 处为 BEGIN_ARRAY

请帮帮我。

Answer 1

您对 API 调用的响应是一个列表，您没有分配给一个列表。

修改你的代码

 Call<SD_Checklist_Supplier_Model> call = apiInterface.getVendors();

作为

 Call<List<SD_Checklist_Supplier_Model>> call = apiInterface.getVendors();