cuidamais/app/src/main/res/layout/activity_register.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"
    android:background="@color/background_color">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:gravity="center"
        android:padding="24dp">

        <ImageView
            android:layout_width="120dp"
            android:layout_height="120dp"
            android:layout_marginBottom="24dp"
            android:src="@drawable/ic_logo"
            android:contentDescription="@string/app_name" />

        <com.google.android.material.card.MaterialCardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:cardCornerRadius="16dp"
            app:cardElevation="4dp"
            app:cardBackgroundColor="@color/surface_color">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:padding="24dp">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/register_title"
                    android:textSize="24sp"
                    android:textStyle="bold"
                    android:textColor="@color/primary_color"
                    android:layout_gravity="center_horizontal"
                    android:layout_marginBottom="24dp"/>

                <com.google.android.material.textfield.TextInputLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="16dp"
                    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">

                    <com.google.android.material.textfield.TextInputEditText
                        android:id="@+id/name_edit_text"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:hint="@string/name_hint"
                        android:inputType="textPersonName" />
                </com.google.android.material.textfield.TextInputLayout>

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <com.google.android.material.textfield.TextInputLayout
                        android:layout_width="0dp"
                        android:layout_weight="1"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="16dp"
                        android:layout_marginEnd="8dp"
                        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">

                        <com.google.android.material.textfield.TextInputEditText
                            android:id="@+id/age_edit_text"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:hint="@string/age_hint"
                            android:inputType="number" />
                    </com.google.android.material.textfield.TextInputLayout>

                    <com.google.android.material.textfield.TextInputLayout
                        android:layout_width="0dp"
                        android:layout_weight="2"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="16dp"
                        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">

                        <com.google.android.material.textfield.TextInputEditText
                            android:id="@+id/utente_edit_text"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:hint="Nº Utente"
                            android:inputType="number" />
                    </com.google.android.material.textfield.TextInputLayout>
                </LinearLayout>

                <com.google.android.material.textfield.TextInputLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="16dp"
                    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">

                    <com.google.android.material.textfield.TextInputEditText
                        android:id="@+id/email_edit_text"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:hint="@string/email_hint"
                        android:inputType="textEmailAddress" />
                </com.google.android.material.textfield.TextInputLayout>

                <com.google.android.material.textfield.TextInputLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="24dp"
                    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">

                    <com.google.android.material.textfield.TextInputEditText
                        android:id="@+id/password_edit_text"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:hint="@string/password_hint"
                        android:inputType="textPassword" />
                </com.google.android.material.textfield.TextInputLayout>

                <com.google.android.material.button.MaterialButton
                    android:id="@+id/register_button"
                    android:layout_width="match_parent"
                    android:layout_height="56dp"
                    android:text="@string/register_button"
                    android:textSize="16sp"
                    android:textStyle="bold"
                    app:cornerRadius="28dp"
                    android:layout_marginBottom="16dp"/>

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:layout_gravity="center_horizontal">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/already_account"
                        android:textColor="@color/text_secondary"
                        android:layout_marginEnd="8dp"/>

                    <TextView
                        android:id="@+id/login_link"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/login_title"
                        android:textStyle="bold"
                        android:textColor="@color/secondary_color"/>
                </LinearLayout>

            </LinearLayout>
        </com.google.android.material.card.MaterialCardView>

    </LinearLayout>
</ScrollView>