<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageButton
        android:id="@+id/ht_img_floatwindows"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/ht_float_logo"
        android:scaleType="center" />

</RelativeLayout>