ntfy-android/app/src/main/res/layout/activity_main.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">

    <com.google.android.material.card.MaterialCardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:shapeAppearance="?shapeAppearanceLargeComponent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            android:id="@+id/main_banner_battery"
            android:visibility="visible"
    >
        <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/main_banner_battery_constraint" android:elevation="5dp">

            <ImageView
                    android:layout_width="28dp"
                    android:layout_height="28dp" app:srcCompat="@drawable/ic_battery_alert_red_24dp"
                    android:id="@+id/main_banner_battery_image"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/main_banner_battery_text"
                    app:layout_constraintEnd_toStartOf="@id/main_banner_battery_text"
                    app:layout_constraintBottom_toBottomOf="@+id/main_banner_battery_text"
                    android:layout_marginStart="15dp"/>
            <TextView
                    android:id="@+id/main_banner_battery_text"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_battery_text"
                    android:textAppearance="@style/TextAppearance.AppCompat.Small"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    android:layout_marginEnd="15dp" android:layout_marginTop="15dp"
                    app:layout_constraintStart_toEndOf="@+id/main_banner_battery_image"
                    android:layout_marginStart="10dp"/>

            <androidx.constraintlayout.helper.widget.Flow
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:constraint_referenced_ids="main_banner_battery_ask_later,main_banner_battery_dontaskagain,main_banner_battery_fix_now"
                    app:layout_constraintTop_toBottomOf="@id/main_banner_battery_text"
                    app:flow_horizontalAlign="end"
                    app:flow_wrapMode="chain"
                    app:flow_horizontalStyle="packed"
                    android:layout_marginEnd="15dp"
                    android:id="@+id/main_banner_battery_flow"
                    app:layout_constraintStart_toStartOf="parent"
                    android:layout_marginStart="15dp"
                    app:flow_horizontalBias="1"
                    app:flow_verticalGap="0dp" app:flow_horizontalGap="0dp"/>

            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_battery_ask_later"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_battery_button_remind_later"
                    tools:layout_editor_absoluteX="15dp" tools:layout_editor_absoluteY="67dp"/>

            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_battery_dontaskagain"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_battery_button_dismiss"
                    tools:layout_editor_absoluteX="142dp" tools:layout_editor_absoluteY="71dp"/>
            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_battery_fix_now"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_battery_button_fix_now"
                    tools:layout_editor_absoluteX="269dp" tools:layout_editor_absoluteY="67dp"/>
        </androidx.constraintlayout.widget.ConstraintLayout>
    </com.google.android.material.card.MaterialCardView>

    <com.google.android.material.card.MaterialCardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:shapeAppearance="?shapeAppearanceLargeComponent" app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toBottomOf="@+id/main_banner_battery"
            android:id="@+id/main_banner_json_stream" android:visibility="visible">

        <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/main_banner_json_stream_constraint" android:elevation="5dp">

            <ImageView
                    android:layout_width="28dp"
                    android:layout_height="28dp" app:srcCompat="@drawable/ic_announcement_orange_24dp"
                    android:id="@+id/main_banner_json_stream_image"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/main_banner_json_stream_text"
                    app:layout_constraintEnd_toStartOf="@id/main_banner_json_stream_text"
                    app:layout_constraintBottom_toBottomOf="@+id/main_banner_json_stream_text"
                    android:layout_marginStart="15dp"/>
            <TextView
                    android:id="@+id/main_banner_json_stream_text"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_json_stream_text"
                    android:textAppearance="@style/TextAppearance.AppCompat.Small"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    android:layout_marginEnd="15dp" android:layout_marginTop="15dp"
                    app:layout_constraintStart_toEndOf="@+id/main_banner_json_stream_image"
                    android:layout_marginStart="10dp" android:autoLink="web"/>

            <androidx.constraintlayout.helper.widget.Flow
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:constraint_referenced_ids="main_banner_json_stream_remind_later,main_banner_json_stream_dontaskagain,main_banner_json_stream_learn_mode" app:layout_constraintTop_toBottomOf="@id/main_banner_json_stream_text" app:flow_horizontalAlign="end" app:flow_wrapMode="chain" app:flow_horizontalStyle="packed" android:layout_marginEnd="15dp" android:id="@+id/flow" app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="15dp" app:flow_horizontalBias="1"
                    app:flow_verticalGap="0dp" app:flow_horizontalGap="0dp"/>

            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_json_stream_remind_later"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_json_stream_button_remind_later"
                    tools:layout_editor_absoluteX="86dp" tools:layout_editor_absoluteY="83dp"/>

            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_json_stream_dontaskagain"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_json_stream_button_dismiss"
                    tools:layout_editor_absoluteX="260dp" tools:layout_editor_absoluteY="83dp"/>


            <com.google.android.material.button.MaterialButton
                    android:id="@+id/main_banner_json_stream_learn_mode"
                    style="@style/Widget.MaterialComponents.Button.TextButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/main_banner_json_stream_button_learn_more"
                    tools:layout_editor_absoluteX="253dp" tools:layout_editor_absoluteY="131dp"/>
        </androidx.constraintlayout.widget.ConstraintLayout>
    </com.google.android.material.card.MaterialCardView>

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
            android:id="@+id/main_subscriptions_list_container"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:visibility="visible"
            app:layout_constraintStart_toStartOf="parent" app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toBottomOf="@id/main_banner_json_stream">
        <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/main_subscriptions_list"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:clickable="true"
                android:focusable="true"
                android:paddingTop="5dp"
                android:paddingBottom="5dp"
                android:clipToPadding="false"
                android:background="?android:attr/selectableItemBackground"
                app:layoutManager="LinearLayoutManager"/>
    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toTopOf="@+id/fab" app:layout_constraintStart_toStartOf="parent"
            android:id="@+id/main_no_subscriptions" android:visibility="gone">
        <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content" app:srcCompat="@drawable/ic_sms_gray_48dp"
                android:id="@+id/main_no_subscriptions_image"/>
        <TextView
                android:id="@+id/main_no_subscriptions_text"
                android:text="@string/main_no_subscriptions_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                android:padding="10dp" android:gravity="center_horizontal"
                android:paddingStart="50dp" android:paddingEnd="50dp"/>
        <TextView
                android:text="@string/main_how_to_intro"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/main_how_to_intro"
                android:layout_marginTop="20dp"
                android:layout_marginStart="50dp"
                android:layout_marginEnd="50dp"/>
        <TextView
                android:text="@string/main_how_to_link"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/main_how_to_link"
                android:layout_marginTop="7dp"
                android:layout_marginStart="50dp"
                android:layout_marginEnd="50dp"
                android:linksClickable="true"
                android:autoLink="web"/>
    </LinearLayout>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="24dp"
            android:contentDescription="@string/main_add_button_description"
            android:src="@drawable/ic_add_black_24dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            style="@style/FloatingActionButton"
    />

</androidx.constraintlayout.widget.ConstraintLayout>