[

    {
        "id": 1,
        "name": "移動開發",
        "alias": "mobile"
    },
    {
        "id": 14,
        "name": "Web前端",
        "alias": "web"
    },
    {
        "id": 15,
        "name": "架構設計",
        "alias": "enterprise"
    },
    {
        "id": 16,
        "name": "程式語言",
        "alias
 
": "code"
    },
    {
        "id": 17,
        "name": "網際網路",
        "alias": "www"
    },
    {
        "id": 6,
        "name": "資料庫",
        "alias": "database"
    },
    {
        "id": 12,
        "name": "系統運維",
        "alias": "system"
    },
    {
        "id": 2,
        "name": "雲端計算"
 
,
        "alias": "cloud"
    },
    {
        "id": 3,
        "name": "研發管理",
        "alias": "software"
    },
    {
        "id": 19,
        "name": "特約專家",
        "alias": "invite"
    },
    {
        "id": 8,
        "name": "行業名家",
        "alias": "celebrity"
    },
    {
        "id": 7
 
,
        "name": "綜合",
        "alias": "other"
    },
    {
        "id": 20,
        "name": "名譽專家",
        "alias": "honour"
    }

]

我解析以上json資料的時候，報出

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

發現自己解析的時候，使用的是物件，而非陣列。但是以上json是陣列形式

package com.android.csdnclient.bean;

import com.google.gson.annotations.SerializedName;

/**
 *  部落格系統分類
 */
public class ChannelBean {

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

    //分類名稱
    @SerializedName("name")
    private String name;

    //分類別名
    @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;

/**
 * 網路請求
 */
public interface CSDNService {

    //獲取部落格系統分類
    @GET("/blog/getchannel")
    Observable<List<ChannelBean>> getChannel(@Query("client_id") String client_id);
}

Observable<List<ChannelBean>>這裡必須使用物件容器來儲存json陣列。