Gadgetbridge/app/src/main/res/layout/fragment_gps.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">

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

        <TextView
            android:id="@+id/textView4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-black"
            android:gravity="center"
            android:text="@string/gps_track"
            android:textSize="16sp" />

        <ImageView
            android:id="@+id/activitygpsview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:src="@tools:sample/avatars" />
    </LinearLayout>

</RelativeLayout>