pocketcommunityclient/app/src/main/res/layout/activity_register.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=".ui.register.RegisterActivity">

    <include
        android:id="@+id/titlebar"
        layout="@layout/titlebar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/titlebar"
        tools:layout_constraintStart_toStartOf="parent">

        <EditText
            android:id="@+id/username"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:importantForAutofill="no"
            android:hint="@string/prompt_user"
            android:inputType="text"
            android:selectAllOnFocus="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <EditText
            android:id="@+id/password"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:layout_marginTop="8dp"
            android:importantForAutofill="no"
            android:hint="@string/prompt_password"
            android:inputType="text|textPassword"
            android:selectAllOnFocus="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username" />

        <EditText
            android:id="@+id/confirmPassword"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:layout_marginTop="8dp"
            android:importantForAutofill="no"
            android:hint="@string/prompt_confirm_password"
            android:inputType="text|textPassword"
            android:selectAllOnFocus="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/password" />

        <EditText
            android:id="@+id/phone"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:layout_marginTop="8dp"
            android:importantForAutofill="no"
            android:hint="@string/prompt_phone"
            android:inputType="text|phone"
            android:selectAllOnFocus="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/confirmPassword" />

        <EditText
            android:id="@+id/email"
            android:layout_width="0dp"
            android:layout_height="wrap_content"

            android:layout_marginTop="8dp"
            android:importantForAutofill="no"
            android:hint="@string/prompt_email"
            android:inputType="none|textEmailAddress"
            android:selectAllOnFocus="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/phone" />

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/email">

            <Button
                android:id="@+id/register"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/size_50"
                android:enabled="false"
                android:text="@string/action_register"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <Button
                android:id="@+id/back"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginEnd="@dimen/size_50"
                android:text="@string/action_back"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="parent" />
        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>