Send Post Request with params using Retrofit

Question

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>

build.gradle

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