MainActivity

package com.example.myapplication;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import Model.ResponseLogin;
import apihelper.BaseApiService;
import apihelper.UtilsApi;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class MainActivity extends AppCompatActivity {

    private EditText InputEmail, InputPassword;
    private Button ButtonLogin;
    ProgressDialog loading;

    Context mContext;
    BaseApiService mApiService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mContext = this;
        mApiService = UtilsApi.getAPIService();
        initComponents();
    }

    private void initComponents() {
        InputEmail = (EditText) findViewById(R.id.input_email);
        InputPassword = (EditText) findViewById(R.id.input_password);
        ButtonLogin = (Button) findViewById(R.id.btn_login);

        ButtonLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                loading = ProgressDialog.show(mContext, null, "Harap Tunggu...", true, false);
                requestLogin();
            }

            private void requestLogin() {
                mApiService.loginRequest(InputEmail.getText().toString(), InputPassword.getText().toString())
                        .enqueue(new Callback<ResponseLogin>() {
                            @Override
                            public void onResponse(Call<ResponseLogin> call, Response<ResponseLogin> response) {
                                Log.e("lele","token sikarsi : " + response.body().getToken());

                                Intent intent = new Intent(mContext, Home.class);
                                startActivity(intent);

                            }

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

                            }
                        });
            }
        });

    }
}