Gadgetbridge/app/src/main/res/layout/fragment_sleepchart.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="nodomain.freeyourgadget.gadgetbridge.activities.charts.ChartsActivity$PlaceholderFragment">

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

        <TextView
            android:id="@+id/sleepchart_info"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0" />

        <com.github.mikephil.charting.charts.PieChart
            android:id="@+id/sleepchart_pie_light_deep"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="2" />

        <com.github.mikephil.charting.charts.LineChart
            android:id="@+id/sleepchart"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="2" />

    </LinearLayout>

    <include
        layout="@layout/layout_widget_heartrate_average"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_gravity="top|end" />

    <include
        layout="@layout/layout_widget_intensity_total"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_marginTop="50dp"
        android:layout_marginEnd="-1dp"
        android:layout_gravity="top|end" />
</RelativeLayout>