I am scanning QR codes in my app, using ZXingScannerView. By default, the scan area is small, with a border. I want it fullscreen. Is there any way to do it?

This is my code:

```
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/toolbar_top">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/backbutton"
        android:layout_alignParentBottom="true"
        android:background="@drawable/buttonshape"
        android:text="@string/back"
        android:textColor="@color/white"/>

    <me.dm7.barcodescanner.zxing.ZXingScannerView
        android:id="@+id/scanview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/backbutton"
        barcodescanner:shouldScaleToFill="true"/>

</RelativeLayout>

protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.scan_layout);
    scannerView=findViewById(R.id.scanview);
    //scannerView.setLaserColor(getColor(android.R.color.transparent));
    scannerView.setLaserEnabled(false);
    scannerView.setShouldScaleToFill(true);
    (...)
}

```

As you can see, I tried setShoulScaleToFill(true); but it does not work.

Is there any way to do it?

Thank you.