Gadgetbridge/app/src/main/res/layout/fragment_statschart.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"
    tools:context="nodomain.freeyourgadget.gadgetbridge.activities.charts.ActivityChartsActivity$PlaceholderFragment">

    <com.github.mikephil.charting.charts.HorizontalBarChart
        android:id="@+id/statschart"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="20"
        android:layout_below="@+id/statsXAxisText"
        android:layout_alignParentStart="true"
        android:layout_toStartOf="@+id/statsYAxisText"></com.github.mikephil.charting.charts.HorizontalBarChart>

    <TextView
        android:id="@+id/statsXAxisText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:paddingLeft="10dp"
        android:text="@string/stats_x_axis_label" />

    <TextView
        android:id="@+id/statsYAxisText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_centerVertical="true"
        android:layout_marginStart="-95dp"
        android:elegantTextHeight="false"
        android:rotation="90"
        android:singleLine="true"
        android:text="@string/stats_y_axis_label"
        android:translationX="40dp" />

</RelativeLayout>