wulkanowy-mod/app/src/main/res/layout/fragment_login_symbol.xml

<FrameLayout 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">

    <ProgressBar
        android:id="@+id/loginSymbolProgress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:indeterminate="true"
        android:visibility="gone" />

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        android:scrollbars="none">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/loginSymbolContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/loginSymbolHeader"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="32dp"
                android:layout_marginLeft="32dp"
                android:layout_marginTop="32dp"
                android:layout_marginEnd="32dp"
                android:layout_marginRight="32dp"
                android:gravity="center_horizontal"
                android:text="@string/login_header_symbol"
                android:textSize="16sp"
                app:fontFamily="sans-serif-light"
                app:layout_constraintBottom_toTopOf="@+id/loginSymbolNameLayout"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_chainStyle="packed" />

            <com.google.android.material.textfield.TextInputLayout
                android:id="@+id/loginSymbolNameLayout"
                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="24dp"
                android:layout_marginLeft="24dp"
                android:layout_marginTop="48dp"
                android:layout_marginEnd="24dp"
                android:layout_marginRight="24dp"
                android:hint="@string/login_symbol_hint"
                app:helperText="@string/login_symbol_helper"
                app:helperTextEnabled="true"
                app:layout_constraintBottom_toTopOf="@+id/loginSymbolSignIn"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.5"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/loginSymbolHeader">

                <androidx.appcompat.widget.AppCompatAutoCompleteTextView
                    android:id="@+id/loginSymbolName"
                    style="@style/Widget.MaterialComponents.TextInputEditText.OutlinedBox"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:imeActionLabel="@string/login_sign_in"
                    android:imeOptions="actionDone"
                    android:inputType="textAutoComplete"
                    android:maxLines="1"
                    tools:ignore="LabelFor" />
            </com.google.android.material.textfield.TextInputLayout>

            <com.google.android.material.button.MaterialButton
                android:id="@+id/loginSymbolSignIn"
                style="@style/Widget.MaterialComponents.Button"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="48dp"
                android:layout_marginEnd="24dp"
                android:layout_marginRight="24dp"
                android:layout_marginBottom="16dp"
                android:text="@string/login_sign_in"
                android:textAppearance="?android:textAppearanceSmall"
                android:textColor="@android:color/white"
                android:textStyle="bold"
                app:backgroundTint="@color/colorPrimary"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/loginSymbolNameLayout" />
        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.core.widget.NestedScrollView>
</FrameLayout>