Retrofit报错onFailure: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was...

Retrofit报错log：

TAG: onFailure: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

报错原因是json解析错误，使用的是

addConverterFactory(GsonConverterFactory.create())

解决方法：
用阿里的开源框架Fastjson自己写一个Factory
添加Fastjson依赖

    implementation 'com.alibaba:fastjson:1.1.71.android'

FastJsonConverterFactory.java

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import okhttp3.RequestBody;
import okhttp3.ResponseBody;
import retrofit2.Converter;
import retrofit2.Retrofit;

public class FastJsonConverterFactory extends Converter.Factory{

    public static FastJsonConverterFactory create() {
        return new FastJsonConverterFactory();
    }

    /**
     * 需要重写父类中responseBodyConverter，该方法用来转换服务器返回数据
     */
    @Override
    public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
        return new FastJsonResponseBodyConverter<>(type);
    }

    /**
     * 需要重写父类中responseBodyConverter，该方法用来转换发送给服务器的数据
     */
    @Override
    public Converter<?, RequestBody> requestBodyConverter(Type type, Annotation[] parameterAnnotations, Annotation[] methodAnnotations, Retrofit retrofit) {
        return new FastJsonRequestBodyConverter<>();
    }
}

FastJsonResponseBodyConverter.java

import com.alibaba.fastjson.JSON;
import java.io.IOException;
import java.lang.reflect.Type;
import okhttp3.ResponseBody;
import okio.BufferedSource;
import okio.Okio;
import retrofit2.Converter;

class FastJsonResponseBodyConverter<T> implements Converter<ResponseBody, T> {
    
private final Type type;

    public FastJsonResponseBodyConverter(Type type) {
        this.type = type;
    }

    /*
     * 转换方法
     */
    @Override
    public T convert(ResponseBody value) throws IOException {
        BufferedSource bufferedSource = Okio.buffer(value.source());
        String tempStr = bufferedSource.readUtf8();
        bufferedSource.close();
        return JSON.parseObject(tempStr, type);
    }
}

FastJsonRequestBodyConverter.java

import com.alibaba.fastjson.JSON;
import java.io.IOException;
import okhttp3.MediaType;
import okhttp3.RequestBody;
import retrofit2.Converter;

public class FastJsonRequestBodyConverter<T> implements Converter<T, RequestBody> {
    private static final MediaType MEDIA_TYPE = MediaType.parse("application/json; charset=UTF-8");

    @Override
    public RequestBody convert(T value) throws IOException {
        return RequestBody.create(MEDIA_TYPE, JSON.toJSONBytes(value));
    }
}

使用方法：

addConverterFactory(FastJsonConverterFactory.create())