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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/charts_duration_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"></TextView>

</LinearLayout>