DonetskWebcam/res/layout/webcam_view.xml

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/webcamViewerFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.annimon.donetskwebcam.WebcamViewerFragment" />