Flutter : Handling error Dio Package (404,400 etc)

Question

I'm learn searching data by ID with package DIO https://pub.dev/packages/dio, my problem is every time I'm type wrong keyword search, the app suddenly crash with debug message 404 Not Found.

I know data not found because I'm type wrong keyword, but I'm already handle this with this code

Widget _searchKeywordMahasiswa() {
    return FutureBuilder<List<Mosque>>(
      future: api.getMahasiswaById(_searchText),
      builder: (BuildContext context, AsyncSnapshot snapshot) {
        if (snapshot.hasData) {
          return Expanded(
            child: ListView.builder(
              shrinkWrap: true,
              itemCount: snapshot.data.length,
              itemBuilder: (BuildContext context, int index) {
                return Text(snapshot.data[index].id);
              },
            ),
          );
        } else if (!snapshot.data) { <<<<<< IN THIS LINE
          return Center(
            child: Icon(
              Icons.sentiment_very_dissatisfied,
              size: 150.0,
            ),
          );
        }
        return CircularProgressIndicator();
      },
    );
    // return CircularProgressIndicator();
  }

Future<List<Mosque>> getMahasiswaById(String id) async{
    try {
      var apiRespon = await dio.get('${Urls.BASE_API_URL}/mahasiswa/get/id/$id');
      var apiResponJson = apiRespon.data;
      print(apiResponJson);
      return (apiResponJson['data'] as List).map((p)=>Mosque.fromJson(p)).toList();

    }on DioError catch (e) { <<<<< IN THIS LINE
      if(e.response.statusCode == 404){
        print(e.response.statusCode);
      }else{
        print(e.message);
        print(e.request);
      }
    }
  }

In same case my App crash too if i'm get error 400 Bad Request And i'm already handle this error but not works.

Can you Help Me With This?

Answer 1

 var response = await dio.delete(
          url,
          data: postData,
          options: Options(
            followRedirects: false,
            validateStatus: (status) {
              return status < 500;
            },
            headers: headers,
          ),
        );

please use the code below bro,

add followRedirects, validateStatus to your code.