Send Post Request with params using Retrofit

Question

I'm trying unsuccessfully to consume an API on Android using Retrofit library but while using POSTMAN I can see the expected results.

POSTMAN SETTING

• The api url (base+controller)

• HTTP Method set to POST

• Clicked the from-data or x-www-form-urlencoded

• Then i pass the two params on the key/value fields.

ANDROID RETROFIT SETTING

@POST("/GetDetailWithMonthWithCode") void getLandingPageReport(@Query("code") String code,                           @Query("monthact") String monthact,                           Callback<LandingPageReport> cb);  @FormUrlEncoded @POST("/GetDetailWithMonthWithCode") void getLandingPageReport(@Field("code") String code,                           @Field("monthact") String monthact,                           Callback<LandingPageReport> cb); 

None of this options works. But am getting {} as result.

UPDATE

Same settings by using the standard HttpClient(and HttpPost) class works fine.

HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(url);  List<NameValuePair> urlParameters = new ArrayList<NameValuePair>(); urlParameters.add(new BasicNameValuePair("code", "testcode")); urlParameters.add(new BasicNameValuePair("monthact", "feb-2015"));  post.setEntity(new UrlEncodedFormEntity(urlParameters));  HttpResponse response = client.execute(post); 

Why I can't do this request and get the correct response in Retrofit?

UPDATE 2

@POST("/GetDetailWithMonthWithCode") void getLandingPageReport(@Query("code") String code,                           @Query("monthact") String monthact,                           Callback<List<LandingPageReport>> cb);  @FormUrlEncoded @POST("/GetDetailWithMonthWithCode") void getLandingPageReport(@Field("code") String code,                           @Field("monthact") String monthact,                           Callback<List<LandingPageReport>>> cb); 

After playing around I think I've found the source of the problem. I've updated my retrofit code to receive List<LandingPageReport>. But now this error occur

retrofit.RetrofitError: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $

The reason is that i consume 2 api's (webapi and wcf). All my other json response are arrays of objects. [{},{}] but in this call I've received this

{   "GetDetailWithMonthWithCodeResult": [      {         "code": "test",         "field1": "test",      }    ] } 

But still I can't manage to parse the response.

Answer 1

build.gradle

      compile 'com.google.code.gson:gson:2.6.2'        compile 'com.squareup.retrofit2:retrofit:2.1.0'// compulsory        compile 'com.squareup.retrofit2:converter-gson:2.1.0' //for retrofit conversion 

Login APi Put Two Parameters

    {         "UserId": "1234",         "Password":"1234"     } 

Login Response

    {         "UserId": "1234",         "FirstName": "Keshav",         "LastName": "Gera",         "ProfilePicture": "312.113.221.1/GEOMVCAPI/Files/1.500534651736E12p.jpg"     } 

APIClient.java

    import retrofit2.Retrofit;     import retrofit2.converter.gson.GsonConverterFactory;      class APIClient {          public static final String BASE_URL = "Your Base Url ";         private static Retrofit retrofit = null;          public static Retrofit getClient() {             if (retrofit == null) {                 retrofit = new Retrofit.Builder()                         .baseUrl(BASE_URL)                         .addConverterFactory(GsonConverterFactory.create())                         .build();             }             return retrofit;         }     } 

APIInterface interface

    interface APIInterface {          @POST("LoginController/Login")         Call<LoginResponse> createUser(@Body LoginResponse login);     } 

Login Pojo

    package pojos;      import com.google.gson.annotations.SerializedName;      public class LoginResponse {           @SerializedName("UserId")         public String UserId;         @SerializedName("FirstName")         public String FirstName;         @SerializedName("LastName")         public String LastName;         @SerializedName("ProfilePicture")         public String ProfilePicture;         @SerializedName("Password")         public String Password;         @SerializedName("ResponseCode")         public String ResponseCode;         @SerializedName("ResponseMessage")         public String ResponseMessage;          public LoginResponse(String UserId, String Password) {             this.UserId = UserId;             this.Password = Password;         }          public String getUserId() {             return UserId;         }          public String getFirstName() {             return FirstName;         }          public String getLastName() {             return LastName;         }          public String getProfilePicture() {             return ProfilePicture;         }          public String getResponseCode() {             return ResponseCode;         }          public String getResponseMessage() {             return ResponseMessage;         }     } 

MainActivity

    package com.keshav.retrofitloginexampleworkingkeshav;      import android.app.Dialog;     import android.os.Bundle;     import android.support.v7.app.AppCompatActivity;     import android.util.Log;     import android.view.View;     import android.widget.Button;     import android.widget.EditText;     import android.widget.TextView;     import android.widget.Toast;      import pojos.LoginResponse;     import retrofit2.Call;     import retrofit2.Callback;     import retrofit2.Response;     import utilites.CommonMethod;      public class MainActivity extends AppCompatActivity {          TextView responseText;         APIInterface apiInterface;          Button loginSub;         EditText et_Email;         EditText et_Pass;         private Dialog mDialog;         String userId;         String password;          @Override         protected void onCreate(Bundle savedInstanceState) {             super.onCreate(savedInstanceState);             setContentView(R.layout.activity_main);              apiInterface = APIClient.getClient().create(APIInterface.class);              loginSub = (Button) findViewById(R.id.loginSub);             et_Email = (EditText) findViewById(R.id.edtEmail);             et_Pass = (EditText) findViewById(R.id.edtPass);              loginSub.setOnClickListener(new View.OnClickListener() {                 @Override                 public void onClick(View v) {                     if (checkValidation()) {                         if (CommonMethod.isNetworkAvailable(MainActivity.this))                             loginRetrofit2Api(userId, password);                         else                             CommonMethod.showAlert("Internet Connectivity Failure", MainActivity.this);                     }                 }             });         }          private void loginRetrofit2Api(String userId, String password) {             final LoginResponse login = new LoginResponse(userId, password);             Call<LoginResponse> call1 = apiInterface.createUser(login);             call1.enqueue(new Callback<LoginResponse>() {                 @Override                 public void onResponse(Call<LoginResponse> call, Response<LoginResponse> response) {                     LoginResponse loginResponse = response.body();                      Log.e("keshav", "loginResponse 1 --> " + loginResponse);                     if (loginResponse != null) {                         Log.e("keshav", "getUserId          -->  " + loginResponse.getUserId());                         Log.e("keshav", "getFirstName       -->  " + loginResponse.getFirstName());                         Log.e("keshav", "getLastName        -->  " + loginResponse.getLastName());                         Log.e("keshav", "getProfilePicture  -->  " + loginResponse.getProfilePicture());                          String responseCode = loginResponse.getResponseCode();                         Log.e("keshav", "getResponseCode  -->  " + loginResponse.getResponseCode());                         Log.e("keshav", "getResponseMessage  -->  " + loginResponse.getResponseMessage());                         if (responseCode != null && responseCode.equals("404")) {                             Toast.makeText(MainActivity.this, "Invalid Login Details \n Please try again", Toast.LENGTH_SHORT).show();                         } else {                             Toast.makeText(MainActivity.this, "Welcome " + loginResponse.getFirstName(), Toast.LENGTH_SHORT).show();                         }                     }                 }                  @Override                 public void onFailure(Call<LoginResponse> call, Throwable t) {                     Toast.makeText(getApplicationContext(), "onFailure called ", Toast.LENGTH_SHORT).show();                     call.cancel();                 }             });         }          public boolean checkValidation() {             userId = et_Email.getText().toString();             password = et_Pass.getText().toString();              Log.e("Keshav", "userId is -> " + userId);             Log.e("Keshav", "password is -> " + password);              if (et_Email.getText().toString().trim().equals("")) {                 CommonMethod.showAlert("UserId Cannot be left blank", MainActivity.this);                 return false;             } else if (et_Pass.getText().toString().trim().equals("")) {                 CommonMethod.showAlert("password Cannot be left blank", MainActivity.this);                 return false;             }             return true;         }     } 

CommonMethod.java

    public class CommonMethod {           public static final String DISPLAY_MESSAGE_ACTION =                 "com.codecube.broking.gcm";          public static final String EXTRA_MESSAGE = "message";          public  static boolean isNetworkAvailable(Context ctx) {             ConnectivityManager connectivityManager                     = (ConnectivityManager)ctx.getSystemService(Context.CONNECTIVITY_SERVICE);             NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();             return activeNetworkInfo != null && activeNetworkInfo.isConnected();         }          public static void showAlert(String message, Activity context) {              final AlertDialog.Builder builder = new AlertDialog.Builder(context);             builder.setMessage(message).setCancelable(false)                     .setPositiveButton("OK", new DialogInterface.OnClickListener() {                         public void onClick(DialogInterface dialog, int id) {                          }                     });             try {                 builder.show();             } catch (Exception e) {                 e.printStackTrace();             }          }     } 

activity_main.xml

    <LinearLayout android:layout_width="wrap_content"         android:layout_height="match_parent"         android:focusable="true"         android:focusableInTouchMode="true"         android:orientation="vertical"         xmlns:android="http://schemas.android.com/apk/res/android">              <ImageView                 android:id="@+id/imgLogin"                 android:layout_width="200dp"                 android:layout_height="150dp"                 android:layout_gravity="center"                 android:layout_marginTop="20dp"                 android:padding="5dp"                 android:background="@mipmap/ic_launcher_round"                 />              <TextView                 android:id="@+id/txtLogo"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_below="@+id/imgLogin"                 android:layout_centerHorizontal="true"                 android:text="Holostik Track and Trace"                 android:textSize="20dp"                 android:visibility="gone" />              <android.support.design.widget.TextInputLayout                 android:id="@+id/textInputLayout1"                 android:layout_width="fill_parent"                 android:layout_height="wrap_content"                 android:layout_marginLeft="@dimen/box_layout_margin_left"                 android:layout_marginRight="@dimen/box_layout_margin_right"                 android:layout_marginTop="8dp"                 android:padding="@dimen/text_input_padding">                  <EditText                     android:id="@+id/edtEmail"                     android:layout_width="fill_parent"                     android:layout_height="wrap_content"                     android:layout_marginTop="5dp"                     android:ems="10"                     android:fontFamily="sans-serif"                     android:gravity="top"                     android:hint="Login ID"                     android:maxLines="10"                     android:paddingLeft="@dimen/edit_input_padding"                     android:paddingRight="@dimen/edit_input_padding"                     android:paddingTop="@dimen/edit_input_padding"                     android:singleLine="true"></EditText>              </android.support.design.widget.TextInputLayout>              <android.support.design.widget.TextInputLayout                 android:id="@+id/textInputLayout2"                 android:layout_width="fill_parent"                 android:layout_height="wrap_content"                 android:layout_below="@+id/textInputLayout1"                 android:layout_marginLeft="@dimen/box_layout_margin_left"                 android:layout_marginRight="@dimen/box_layout_margin_right"                 android:padding="@dimen/text_input_padding">                  <EditText                     android:id="@+id/edtPass"                     android:layout_width="match_parent"                     android:layout_height="wrap_content"                     android:focusable="true"                     android:fontFamily="sans-serif"                     android:hint="Password"                     android:inputType="textPassword"                      android:singleLine="true" />              </android.support.design.widget.TextInputLayout>              <RelativeLayout                 android:id="@+id/rel12"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_below="@+id/textInputLayout2"                 android:layout_marginTop="10dp"                 android:layout_marginLeft="10dp"                 >                  <Button                     android:id="@+id/loginSub"                     android:layout_width="wrap_content"                     android:layout_height="45dp"                     android:layout_alignParentRight="true"                     android:layout_centerVertical="true"                     android:background="@drawable/border_button"                     android:paddingLeft="30dp"                     android:paddingRight="30dp"                     android:layout_marginRight="10dp"                     android:text="Login"                     android:textColor="#ffffff" />                 </RelativeLayout>      </LinearLayout>