react-native-rectangle-scanner/android/src/main/res/layout/activity_rectangle_scanner.xml

Scan documents, automatic border detection, automatic crop, image filters

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:opencv="http://schemas.android.com/apk/res-auto"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:configChanges="orientation|keyboardHidden"
    android:background="#000000FF"
    tools:context=".CameraDeviceControllerActivity">
    <SurfaceView
        android:id="@+id/surfaceView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="false"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:background="#000000FF"
        android:layout_alignParentEnd="true" />
</FrameLayout>