fksar/app/src/main/res/layout/activity_lock.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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:background="?attr/colorSurface">

    <!-- PIN unlock -->
    <LinearLayout
        android:id="@+id/viewPin"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingHorizontal="24dp"
        android:paddingBottom="40dp"
        android:visibility="gone">

        <!-- Top spacer: equal weight to bottom spacer centers the title between screen top and numpad -->
        <View
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/unlock_app"
            android:textAppearance="?attr/textAppearanceHeadlineMedium"
            android:textColor="?attr/colorOnSurface"
            android:gravity="center"
            android:layout_marginBottom="8dp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/unlock_pin_subtitle"
            android:textAppearance="?attr/textAppearanceBodyMedium"
            android:textColor="?attr/colorOnSurfaceVariant"
            android:gravity="center" />

        <!-- Bottom spacer: equal weight centers title in the space above the numpad -->
        <View
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/tvLockPinDots"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:textSize="26sp"
            android:letterSpacing="0.3"
            android:textColor="?attr/colorPrimary"
            android:layout_marginBottom="24dp" />

        <LinearLayout
            android:id="@+id/lockNumpadContainer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:gravity="center_horizontal" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btnLockBiometricFromPin"
            style="@style/Widget.Material3.Button.TextButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="8dp"
            android:text="@string/use_biometrics"
            android:visibility="gone" />

    </LinearLayout>

    <!-- Pattern unlock -->
    <LinearLayout
        android:id="@+id/viewPattern"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingHorizontal="24dp"
        android:paddingBottom="40dp"
        android:visibility="gone">

        <!-- Top spacer: equal weight to bottom spacer centers the title -->
        <View
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/unlock_app"
            android:textAppearance="?attr/textAppearanceHeadlineMedium"
            android:textColor="?attr/colorOnSurface"
            android:gravity="center"
            android:layout_marginBottom="8dp" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/unlock_pattern_subtitle"
            android:textAppearance="?attr/textAppearanceBodyMedium"
            android:textColor="?attr/colorOnSurfaceVariant"
            android:gravity="center" />

        <!-- Bottom spacer: equal weight centers title in the space above the pattern -->
        <View
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/tvPatternHint"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textAppearance="?attr/textAppearanceBodySmall"
            android:textColor="?attr/colorOnSurfaceVariant"
            android:gravity="center"
            android:layout_marginBottom="12dp" />

        <sh.sar.basedbank.ui.onboarding.PatternView
            android:id="@+id/lockPatternView"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="2"
            android:layout_gravity="center_horizontal" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btnLockBiometricFromPattern"
            style="@style/Widget.Material3.Button.TextButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="8dp"
            android:text="@string/use_biometrics"
            android:visibility="gone" />

    </LinearLayout>

</FrameLayout>