mobile-android/app/src/main/res/layout/activity_change_postcode.xml

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>
        <variable
            name="viewModel"
            type="au.gov.health.covidsafe.ui.settings.SettingsViewModel" />
    </data>

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/toolbar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/lighter_green"
            app:title="@string/change_postcode_heading"
            app:popupTheme="@style/MobileKit.FeedbackTheme.PopupOverlay" />

    </com.google.android.material.appbar.AppBarLayout>

    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginTop="?attr/actionBarSize"
        android:layout_marginBottom="100dp"
        android:fillViewport="true"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/toolbar_layout"
        app:layout_constraintBottom_toTopOf="@+id/btn_continue">

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/space_32"
            android:layout_marginEnd="@dimen/space_32"
            android:layout_margin="@dimen/space_16"
            android:orientation="vertical"
            visibility="@{!viewModel.postcodeUpdated}">

        <TextView
            android:id="@+id/postcode_content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/space_24"
            style="?textAppearanceBody1"
            android:textSize="16sp"
            android:lineHeight="@dimen/space_24"
            android:text="@string/change_postcode_intro"
            android:layout_alignBottom="@+id/title" />

            <TextView
                android:id="@+id/txt_postcode"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/space_40"
                style="?textAppearanceBody1"
                android:textSize="18sp"
                android:lineHeight="@dimen/space_24"
                android:text="@string/postcode_change_label" />

            <EditText
                android:id="@+id/post_code"
                android:layout_width="match_parent"
                android:layout_height="@dimen/text_field_height"
                android:layout_marginTop="@dimen/space_8"
                android:background="@drawable/edittext_modified_states"
                android:contentDescription="@string/personal_details_post_code_content_description"
                android:digits="0123456789"
                android:gravity="center_vertical|start"
                android:imeOptions="actionDone"
                android:inputType="number"
                android:maxLength="4"
                android:paddingStart="@dimen/keyline_1"
                android:paddingEnd="@dimen/keyline_1"
                android:textDirection="locale"
                android:textAlignment="viewStart"
                android:textColor="@color/slack_black"
                android:textColorHighlight="@color/dark_cerulean_3"
                android:textCursorDrawable="@null"
                android:textSize="@dimen/text_body_small" />

            <TextView
                android:id="@+id/post_code_error"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="@dimen/keyline_1"
                android:text="@string/personal_details_post_code_error_prompt"
                android:textColor="@color/error_red"
                android:visibility="invisible"/>

        </LinearLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="@dimen/space_32"
                android:layout_marginEnd="@dimen/space_32"
                android:layout_margin="@dimen/space_16"
                android:orientation="vertical"
                visibility="@{viewModel.postcodeUpdated}">

                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:src="@drawable/ic_illustration"/>

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="@dimen/space_16"
                    style="?textAppearanceBody1"
                    android:textSize="28sp"
                    android:textStyle="bold"
                    android:text="@string/postcode_success" />

                <TextView
                    android:id="@+id/postcode_updated"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="@dimen/space_16"
                    style="?textAppearanceBody1"
                    android:textSize="14sp"
                    android:lineHeight="@dimen/space_24"
                    android:text="@string/permission_success_content" />

            </LinearLayout>
        </LinearLayout>
    </ScrollView>

    <Button
        android:id="@+id/btn_continue"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/space_16"
        android:layout_marginEnd="@dimen/space_16"
        android:layout_marginTop="@dimen/space_24"
        android:layout_marginBottom="@dimen/space_24"
        android:text="@string/action_continue"
        app:layout_constraintBottom_toBottomOf="parent"
        visibility = "@{!viewModel.postcodeUpdated}" />

    <Button
        android:id="@+id/btn_done"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="@dimen/space_16"
        android:layout_marginEnd="@dimen/space_16"
        android:layout_marginTop="@dimen/space_24"
        android:layout_marginBottom="@dimen/space_24"
        android:text ="@string/action_upload_done"
        app:layout_constraintBottom_toBottomOf="parent"
        visibility ="@{viewModel.postcodeUpdated}"/>


    <FrameLayout
        android:id="@+id/case_loading_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintTop_toTopOf="parent"
        android:orientation="vertical"
        android:gravity="center"
        visibility = "@{viewModel.showSpinner}">

        <View
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/black"
           android:alpha="0.6"/>

        <com.airbnb.lottie.LottieAnimationView
            android:id="@+id/loading_animation_view"
            android:layout_width="@dimen/covidsafe_loading_animation_size"
            android:layout_height="@dimen/covidsafe_loading_animation_size"
            android:layout_centerHorizontal="true"
            app:lottie_autoPlay="true"
            app:lottie_fileName="loading_upload.json"
            app:lottie_loop="true"
            app:lottie_speed="1"
            android:layout_gravity="center"/>

    </FrameLayout>

</androidx.constraintlayout.widget.ConstraintLayout>
</layout>