Retrofit POST Method with WCF services getting error code 400 : Bad Request

Question

I want to call a POST Method(REST API) in Retrofit with a JSON data. Postman and Volley library works well, I want to implement it in Retrofit..

I'm looking into it for last two days, not getting any solution.. I have referred this link and this link and much more which look similar but not working out for me..Might be i'm doing something wrong..

These are my inputs and output look like this and my coding part lies here

public class Api {
private static Retrofit retrofit = null;
public static ApiInterface getClient() {


    if (retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl("xxxx/Service1.svc/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    //Creating object for our interface
        ApiInterface api = retrofit.create(ApiInterface.class);
    return api; // return the APIInterface object
}}

and interface as

public interface ApiInterface {

@FormUrlEncoded
@POST("UserLogin")
Call<SignUpResponse> registration(@Field("Mobile_no") String mobile,
                                  @Field("Password") String pass,
                                  @Field("RegID") String regId);}

and updated Pojo class as

public class SignUpResponse {


@SerializedName("UserLoginResult")
@Expose
private UserLoginResult userLoginResult;

public UserLoginResult getUserLoginResult() {
    return userLoginResult;
}

public void setUserLoginResult(UserLoginResult userLoginResult) {
    this.userLoginResult = userLoginResult;
}}class UserLoginResult {

@SerializedName("Email_id")
@Expose
private String emailId;
@SerializedName("First_name")
@Expose
private String firstName;
@SerializedName("Last_name")
@Expose
private String lastName;
@SerializedName("Message")
@Expose
private String message;
@SerializedName("Mobile_no")
@Expose
private String mobileNo;
@SerializedName("Password")
@Expose
private String password;
@SerializedName("RegID")
@Expose
private String regID;
@SerializedName("Status")
@Expose
private String status;

public String getEmailId() {
    return emailId;
}

public void setEmailId(String emailId) {
    this.emailId = emailId;
}

public String getFirstName() {
    return firstName;
}

public void setFirstName(String firstName) {
    this.firstName = firstName;
}

public String getLastName() {
    return lastName;
}

public void setLastName(String lastName) {
    this.lastName = lastName;
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}

public String getMobileNo() {
    return mobileNo;
}

public void setMobileNo(String mobileNo) {
    this.mobileNo = mobileNo;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public String getRegID() {
    return regID;
}

public void setRegID(String regID) {
    this.regID = regID;
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}}

and on MainActivity

Api.getClient().registration("xxxNumberhere","rd","222").enqueue(new Callback<SignUpResponse>() {
        @Override
        public void onResponse(Call<SignUpResponse> call, Response<SignUpResponse> response) {
            signUpResponsesData = response.body();
            Toast.makeText(getApplicationContext(), response.body().getUserLoginResult().getMessage(), Toast.LENGTH_SHORT).show();
            progressDialog.dismiss();

        }

        @Override
        public void onFailure(Call<SignUpResponse> call, Throwable t) {
            Log.d("response", t.getStackTrace().toString());
            progressDialog.dismiss();

        }
    });

and my dependencies are

compile 'com.squareup.retrofit2:retrofit:2.1.0'
// JSON Parsing
compile 'com.google.code.gson:gson:2.6.1'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'

Thanks in advance..

Subin Babu · Answer 1 · 2018-05-25T10:26:15.570

1

Following class name and functions are related to my project

You can be done via,

public interface APIService {
    @POST("seq/restapi/checkpassword")
    @Headers({
        "Content-Type: application/json;charset=utf-8",
        "Accept: application/json;charset=utf-8",
        "Cache-Control: max-age=640000"
    })
    Call<Post> savePost(@Body User user);
}

Then you can send data as,

 User user = new User(); 
 user.setUsername("abcd"); 
 user.setPassword("password"); 
 public void sendPost(User user) { 
    mAPIService.savePost(user).enqueue(new Callback<Post>() { 
        @Override public void onResponse(Call<Post> call, Response<Post> response) { 
            if (response.isSuccessful()) { } 
            } 
        @Override public void onFailure(Call<Post> call, Throwable t) { }

    });
 }

You can parse the error 400 by,

Gson gson = new GsonBuilder().create(); 
RetrofitError mError = gson.fromJson(response.errorBody().string(), RetrofitError.class); 
Toast.makeText(context, mError.getMessages().getError().get(0).getMessage(),Toast.LENGTH_LONG).show();

and add RetrofitError class,

public class RetrofitError {
    @SerializedName("messages")
    @Expose
    private Messages messages;

    public Messages getMessages() {
        return messages;
    }

    public void setMessages(Messages messages) {
        this.messages = messages;
    }
}

If you have any doubt refer my question. Happy coding... Feel free to ask, if any. NB: Add the POJO

    public class Example {

@SerializedName("UserLoginResult")
@Expose
private UserLoginResult userLoginResult;

public UserLoginResult getUserLoginResult() {
return userLoginResult;
}

public void setUserLoginResult(UserLoginResult userLoginResult) {
this.userLoginResult = userLoginResult;
}

}

--------UserLoginResult import com.google.gson.annotations.Expose; import com.google.gson.annotations.SerializedName;

public class UserLoginResult {

@SerializedName("Email_id")
@Expose
private String emailId;
@SerializedName("First_name")
@Expose
private String firstName;
@SerializedName("Last_name")
@Expose
private String lastName;
@SerializedName("Message")
@Expose
private String message;
@SerializedName("Mobile_no")
@Expose
private String mobileNo;
@SerializedName("Password")
@Expose
private String password;
@SerializedName("RegID")
@Expose
private String regID;
@SerializedName("Status")
@Expose
private String status;

public String getEmailId() {
return emailId;
}

public void setEmailId(String emailId) {
this.emailId = emailId;
}

public String getFirstName() {
return firstName;
}

public void setFirstName(String firstName) {
this.firstName = firstName;
}

public String getLastName() {
return lastName;
}

public void setLastName(String lastName) {
this.lastName = lastName;
}

public String getMessage() {
return message;
}

public void setMessage(String message) {
this.message = message;
}

public String getMobileNo() {
return mobileNo;
}

public void setMobileNo(String mobileNo) {
this.mobileNo = mobileNo;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public String getRegID() {
return regID;
}

public void setRegID(String regID) {
this.regID = regID;
}

public String getStatus() {
return status;
}

public void setStatus(String status) {
this.status = status;
}

}

edited May 25 '18 at 10:26

answered May 25 '18 at 08:23

Subin Babu

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i have already mentioned your link above you can check out..then also i have tried again now,not working..i think some other issue with json parsing – Rajesh Naddy May 25 '18 at 08:30
Response{protocol=http/1.1, code=400, message=Bad Request, url=http://xxxx/UserLogin} – Rajesh Naddy May 25 '18 at 09:07
Is it Magento API?. Can you parse the error message – Subin Babu May 25 '18 at 09:14
in your case result was json data without list ,and here it is inside a list,thats the difference,hope you getting my point. – Rajesh Naddy May 25 '18 at 09:14
Its not problem you can add the array before the list, Any way you can parse the error – Subin Babu May 25 '18 at 09:15
I update my answer with error parsing code , please check and find the error – Subin Babu May 25 '18 at 09:16
it is a Rest Api, – Rajesh Naddy May 25 '18 at 09:17
I update my answer with error parsing code , please check and find the error – Subin Babu May 25 '18 at 09:21
Add RetrofitError class as mentioned in answer – Subin Babu May 25 '18 at 09:36
Response{protocol=http/1.1, code=400, message=Bad Request, url=xxxx/UserLogin} id Retrofit error ,not the data parsing error – Subin Babu May 25 '18 at 09:40
this error persist now sorry if iam disturbing you ,https://stackoverflow.com/questions/28418662/expected-begin-object-but-was-string-at-line-1-column-1/28418787 – Rajesh Naddy May 25 '18 at 09:49
Please create POJO using http://www.jsonschema2pojo.org/, I think your parsing POJO is incorrect – Subin Babu May 25 '18 at 09:55
i have changed Json as per this link https://stackoverflow.com/a/31108452/7894033 – Rajesh Naddy May 25 '18 at 09:57
Y it's not working, you create the pojo with JSON Schema , else add the responce to your question , iwill make the POJO – Subin Babu May 25 '18 at 10:15
i have used that link to make POJO, but still error occurs. – Rajesh Naddy May 25 '18 at 10:17
Text me the response – Subin Babu May 25 '18 at 10:22
{ "UserLoginResult": { "Email_id": "qasacga@hap.com", "First_name": "rahul", "Last_name": "devasni", "Message": "Successfully Logged in..", "Mobile_no": "8291782221", "Password": "rd", "RegID": "222", "Status": "1" } } – Rajesh Naddy May 25 '18 at 10:23
i have updated POJO and same error com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $ – Rajesh Naddy May 25 '18 at 10:32

score 0 · Answer 2 · answered May 25 '18 at 12:16

Thank you for your kind Help @Subin Babu

Changes that i have did on my project

1)Added a POJO class as same name as parameter

public class User {

public String getMobile_no() {
    return Mobile_no;
}

public void setMobile_no(String mobile_no) {
    Mobile_no = mobile_no;
}

public String getPassword() {
    return Password;
}

public void setPassword(String password) {
    Password = password;
}

public String getRegID() {
    return RegID;
}

public void setRegID(String regID) {
    RegID = regID;
}

private String Mobile_no;
private String Password;
private String RegID;

public User(String Mobile_no,String Password,String RegID)
{
    this.Mobile_no = Mobile_no;
    this.Password = Password;
    this.RegID = RegID;
}}

2)Updated ApiInterface class as

public interface ApiInterface {

@POST("UserLogin")
Call<SignUpResponse> registration(@Body User body);
}

3)Updated MainActivity class as

User user = new User("xxxNumber", "rd", "555");

    Api.getClient().registration(user).enqueue(new Callback<SignUpResponse>() {
        @Override
        public void onResponse(Call<SignUpResponse> call, Response<SignUpResponse> response) {
            signUpResponsesData = response.body();
        }

        @Override
        public void onFailure(Call<SignUpResponse> call, Throwable t) {

        }
    });

4)All the other remains the same..

Retrofit POST Method with WCF services getting error code 400 : Bad Request

2 Answers2

Changes that i have did on my project