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

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <Spinner
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/qhybrid_file_types" />

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

            <Switch
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="encrypted file"
                android:id="@+id/qhybrid_switch_encrypted_file" />

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="download file"
                android:id="@+id/qhybrid_button_download_file" />

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="upload file"
                android:id="@+id/qhybrid_button_upload_file" />

        </LinearLayout>

    </RelativeLayout>

</androidx.constraintlayout.widget.ConstraintLayout>