activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity"
    android:background="@drawable/bg_login">

    <Button
        android:id="@+id/sign_up"
        android:layout_width="144dp"
        android:layout_height="40dp"
        android:layout_marginStart="31dp"
        android:layout_marginBottom="26dp"
        android:background="@drawable/button_sign_up"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/log_in"
        android:layout_width="144dp"
        android:layout_height="40dp"
        android:layout_marginEnd="31dp"
        android:layout_marginBottom="26dp"
        android:background="@drawable/button_log_in"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <EditText
        android:id="@+id/editusername"
        android:layout_width="200dp"
        android:layout_height="40dp"
        android:layout_marginEnd="36dp"
        android:layout_marginBottom="15dp"
        app:layout_constraintBottom_toTopOf="@+id/editpassword"
        app:layout_constraintEnd_toEndOf="parent" />

    <EditText
        android:id="@+id/editpassword"
        android:layout_width="200dp"
        android:layout_height="40dp"
        android:layout_marginEnd="36dp"
        android:layout_marginBottom="78dp"
        android:inputType="textPassword"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>