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

<LinearLayout 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"
    tools:context="nodomain.freeyourgadget.gadgetbridge.activities.charts.ChartsActivity$PlaceholderFragment"
    android:orientation="vertical">

    <TextView
        android:id="@+id/sleepchart_info"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="90" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="10"
        android:orientation="horizontal">

        <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="40" />

        <com.github.mikephil.charting.charts.LineChart
            android:id="@+id/sleepchart"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="20" />
    </LinearLayout>


    <!--<TextView-->
        <!--android:text="Test"-->
        <!--android:layout_width="fill_parent"-->
        <!--android:layout_height="fill_parent"-->
        <!--android:layout_weight="20" />-->

</LinearLayout>