layout_signup.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"
    android:padding="20dp"
    tools:context="SignUp">

    <TextView
        android:id="@+id/register"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="51dp"
        android:text="Sign Up"
        android:textColor="@color/colorPrimary"
        android:textSize="25sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:padding="10dp"
        android:layout_marginTop="30dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:hint="Name"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/register" />

    <EditText
        android:id="@+id/email"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:padding="10dp"
        android:layout_marginTop="42dp"
        android:layout_marginEnd="4dp"
        android:layout_marginRight="4dp"
        android:ems="10"
        android:inputType="textEmailAddress"
        android:hint="Email Address"
        app:layout_constraintEnd_toEndOf="@+id/name"
        app:layout_constraintTop_toBottomOf="@+id/name" />

    <EditText
        android:id="@+id/password"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:padding="10dp"
        android:layout_marginStart="2dp"
        android:layout_marginLeft="2dp"
        android:layout_marginTop="48dp"
        android:ems="10"
        android:inputType="text"
        android:hint="Password"
        app:layout_constraintStart_toStartOf="@+id/email"
        app:layout_constraintTop_toBottomOf="@+id/email" />

    <Button
        android:id="@+id/signupButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        android:text="Register"
        android:textColor="@android:color/white"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/password" />

    <TextView
        android:id="@+id/singinLink"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Already have an account?"
        android:textSize="15sp"
        android:textAllCaps="true"
        android:textColor="@color/colorAccent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/signupButton" />
</androidx.constraintlayout.widget.ConstraintLayout>