如何在 retrofit 2 android 响应中处理 API 响应中的空数组返回？

Question

The response of My API is as below.

{
"status": true,
  "message": "",
  "data": {
    "property_data": [
      {
        "iPropertyID": "179",
        "sImage": "http://192.168.1.100:8080/protechdna/img/property/180219045755Etim%25web.jpg",
        "isImageUploaded": true,
        "sTypeOfPropertyMarked": "Sound System",
        "sModel": "201",
        "sMake": "sony",
        "sSerialNumber": "12456789",
        "sApproxValue": "149",
        "sDescriptionOfProperty": "Description Of Property Description Of Property",
        "sUniqueidentifyingFeatures": "Unique identifying features Unique identifying features Unique identifying features",
        "room_detail": {
          "iRoomID": "242",
          "sRoomName": "romania"
        },
        "pin_detail": {
          "iPinID": "788",
          "sPin": "12345",
          "kit_detail": {
            "iKitID": "6",
            "sTypeOfKit": "DNA Spray"
          }
        },
        "owner_detail": {
          "iUserID": "702",
          "sEmailID": "priyank.nyusoft@gmail.com",
          "full_name": "priyank Patel",
          "address_line": "Main street",
          "sPhone": "(999) 999-9999",
          "state_detail": {
            "iStateID": "41",
            "sStateName": "Ohio"
          },
          "county_detail": {
            "iCountyID": "2117",
            "sCountyName": "Portage"
          },
          "city_detail": {
            "iCityID": "20241",
            "sCityName": "Newton Falls"
          },
          "zipcode_detail": {
            "iZipCodeID": "18762",
            "sZipcode": "44444"
          }
        }
      }
    ],
    "bicycle_data": [
      {
        "iBicycleID": "357",
        "sImage": "http://192.168.1.100:8080/protechdna/img/property/220419021553101018213027hi%20res%20bike.jpg",
        "isImageUploaded": true,
        "sBicycleName": "catrike",
        "sModel": "fgfdg",
        "sMake": "dfgfg",
        "sSerialNumber": "gfhfghtgf",
        "sApproxValue": "456",
        "sBicycleColor": "gff",
        "sUniqueidentifyingFeatures": "fghfh",
        "bicycletype_detail": {
          "iBicycleTypeID": "3",
          "sTypeName": "Touring Bikes"
        },
        "pin_detail": {
          "iPinID": "788",
          "sPin": "12345",
          "kit_detail": {
            "iKitID": "6",
            "sTypeOfKit": "DNA Spray"
          }
        },
        "owner_detail": {
          "sEmailID": "bharat.nyusoft@gmail.com",
          "full_name": "golden bicycle New",
          "address_line": "t",
          "iUserID": "",
          "sPhone": "",
          "state_detail": {
            "iStateID": "12",
            "sStateName": "Florida"
          },
          "county_detail": {
            "iCountyID": "357",
            "sCountyName": "Leon"
          },
          "city_detail": {
            "iCityID": "3900",
            "sCityName": "Tallahassee"
          },
          "zipcode_detail": {
            "iZipCodeID": "13609",
            "sZipcode": "32312"
          }
        }
      },
      {
        "iBicycleID": "356",
        "sImage": "http://192.168.1.100:8080/protechdna/img/property/020419084735041018112608hi%20res%20bike.jpg",
        "isImageUploaded": true,
        "sBicycleName": "catrike",
        "sModel": "erer 123",
        "sMake": "df",
        "sSerialNumber": "12456789012",
        "sApproxValue": "10",
        "sBicycleColor": "erer",
        "sUniqueidentifyingFeatures": "erer",
        "bicycletype_detail": {
          "iBicycleTypeID": "2",
          "sTypeName": "Cyclocross Bikes"
        },
        "pin_detail": {
          "iPinID": "788",
          "sPin": "12345",
          "kit_detail": {
            "iKitID": "6",
            "sTypeOfKit": "DNA Spray"
          }
        },
        "owner_detail": {
          "iUserID": "600",
          "sEmailID": "das@gmail.com",
          "full_name": "Das Patel",
          "address_line": "",
          "sPhone": "(123) 777-7007",
          "state_detail": null,
          "county_detail": null,
          "city_detail": null,
          "zipcode_detail": null
        }
      }
    ],
    "vehicle_data": [

    ],
    "accessory_data": [

    ]
  }
}

In last array you can see there is no data and showing brackets in vehicle_data and accessory_data When API returns this kind of response the retrofit response is going in onfailure in place of onResponse. can anyone help me in this? This is a 3rd party API which I am not able to modify response from server side.

Answer 1

In that case you are returning a list with no attributes type/data types,Let me clear If you had attributes/items on it you may make a pojo class to catch the response,so how do you think catch a response what has no model/pojo type class,so this is a exception causeing OnFailour method. If you want to use this List put some attributes there and set them null,like what you did with your other lists

in other way you can be sure after you get a successful response if it is eampty or not,put this condition in your OnResponse method

if(response.body().toString().length()==0)
  {
    //array is empty
  }