project

Login xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="id.anhs.bantuemart.ui.activity.main.LoginActivity"
    android:background="@color/colorPrimary">
    <ImageView
        android:layout_centerHorizontal="true"
        android:src="@mipmap/ic_launcher_shop_round"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout"/>
    <LinearLayout
        android:layout_alignParentBottom="true"
        android:padding="30dp"
        android:orientation="vertical"
        android:layout_width="325dp"
        android:layout_height="295dp"
        android:layout_marginRight="8dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginLeft="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="8dp"
        android:id="@+id/linearLayout">
        <android.support.design.widget.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:background="@color/colorTextSelectedTab">
            <android.support.design.widget.TextInputEditText
                android:id="@+id/txtLoginEmail"
                android:layout_width="match_parent"
                android:layout_height="50dp"
                android:inputType="textEmailAddress"
                android:hint="Email"/>
        </android.support.design.widget.TextInputLayout>
        <android.support.design.widget.TextInputLayout
            android:layout_marginTop="12dp"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:background="@color/colorTextSelectedTab">
            <android.support.design.widget.TextInputEditText
                android:id="@+id/txtLoginPassword"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="textPassword"
                android:hint="Password"/>
        </android.support.design.widget.TextInputLayout>
        <Button
            android:id="@+id/btnLogin"
            android:background="@drawable/shape_rectangle_round"
            android:textColor="@color/colorPrimary"
            android:ems="10"
            android:layout_marginTop="16dp"
            android:layout_gravity="center"
            android:text="Login"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textStyle="bold"/>
        <TextView
            android:textStyle="bold"
            android:id="@+id/txtCreateAcc"
            android:layout_marginTop="24dp"
            android:textAlignment="center"
            android:text="Buat Akun baru Disini !"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:clickable="true"
            android:focusable="true"/>
    </LinearLayout>

</android.support.constraint.ConstraintLayout>

Login Java
package id.anhs.bantuemart.ui.activity.main;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import butterknife.BindView;
import android.widget.TextView;

import butterknife.ButterKnife;
import id.anhs.bantuemart.R;


public class LoginActivity extends AppCompatActivity {
    @BindView(R.id.txtCreateAcc) TextView txtCreateAcc;
    @SuppressLint("Assert")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        final EditText username = findViewById(R.id.txtLoginEmail);
        final EditText password = findViewById(R.id.txtLoginPassword);
        Button Login = findViewById(R.id.btnLogin);

        ButterKnife.bind(this);

        Login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String user = username.getText().toString();
                String pass_ = password.getText().toString();
                {
                    Toast.makeText(getApplicationContext(), "Selamat Anda Berhasil Masuk", Toast.LENGTH_SHORT).show();
                    Intent i = new Intent(LoginActivity.this, MainActivity.class);
                    startActivity(i);
                }
            }
        });
        txtCreateAcc.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent b = new Intent(LoginActivity.this, RegisterActivity.class);
                startActivity(b);
            }
        });
    }