Expected BEGIN_OBJECT but was BEGIN_ARRARY at line 1 column 2 path$异常解决方法

[

    {
        "id": 1,
        "name": "移动开发",
        "alias": "mobile"
    },
    {
        "id": 14,
        "name": "Web前端",
        "alias": "web"
    },
    {
        "id": 15,
        "name": "架构设计",
        "alias": "enterprise"
    },
    {
        "id": 16,
        "name": "编程语言",
        "alias": "code"
    },
    {
        "id": 17,
        "name": "互联网",
        "alias": "www"
    },
    {
        "id": 6,
        "name": "数据库",
        "alias": "database"
    },
    {
        "id": 12,
        "name": "系统运维",
        "alias": "system"
    },
    {
        "id": 2,
        "name": "云计算",
        "alias": "cloud"
    },
    {
        "id": 3,
        "name": "研发管理",
        "alias": "software"
    },
    {
        "id": 19,
        "name": "特约专家",
        "alias": "invite"
    },
    {
        "id": 8,
        "name": "行业名家",
        "alias": "celebrity"
    },
    {
        "id": 7,
        "name": "综合",
        "alias": "other"
    },
    {
        "id": 20,
        "name": "名誉专家",
        "alias": "honour"
    }

]

我解析以上json数据的时候，报出

java.lang.illegalStateException:Expected BEGIN_OBJECT but was BEGIN_ARRARY at line 1 column 2 path$

发现自己解析的时候，使用的是对象，而非数组。但是以上json是数组形式

package com.android.csdnclient.bean;

import com.google.gson.annotations.SerializedName;

/**
 *  博客系统分类
 */
public class ChannelBean {

    //分类id
    @SerializedName("id")
    private int id;

    //分类名称
    @SerializedName("name")
    private String name;

    //分类别名
    @SerializedName("alias")
    private String alias;

    public String getAlias() {
        return alias;
    }

    public void setAlias(String alias) {
        this.alias = alias;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package com.android.csdnclient.retrofit;

import com.android.csdnclient.bean.ChannelBean;

import java.util.List;

import retrofit2.http.GET;
import retrofit2.http.Query;
import rx.Observable;

/**
 * 网络请求
 */
public interface CSDNService {

    //获取博客系统分类
    @GET("/blog/getchannel")
    Observable> getChannel(@Query("client_id") String client_id);
}

Observable>这里必须使用对象容器来保存json数组。