setup device orientation listener

Author: navaronbracke

android/src/main/kotlin/dev/steenbakker/mobile_scanner/MobileScanner.kt

@@ -46,8 +46,8 @@ class MobileScanner(
     private val textureRegistry: TextureRegistry,
     private val mobileScannerCallback: MobileScannerCallback,
     private val mobileScannerErrorCallback: MobileScannerErrorCallback,
-    private val barcodeScannerFactory: (options: BarcodeScannerOptions?) -> BarcodeScanner = ::defaultBarcodeScannerFactory,
     private val deviceOrientationListener: DeviceOrientationListener,
+    private val barcodeScannerFactory: (options: BarcodeScannerOptions?) -> BarcodeScanner = ::defaultBarcodeScannerFactory,
 ) {
 
     /// Internal variables

android/src/main/kotlin/dev/steenbakker/mobile_scanner/MobileScannerHandler.kt

@@ -84,6 +84,8 @@ class MobileScannerHandler(
             "dev.steenbakker.mobile_scanner/scanner/method")
         methodChannel!!.setMethodCallHandler(this)
 
+        val deviceOrientationListener = DeviceOrientationListener(activity)
+
         deviceOrientationChannel = EventChannel(binaryMessenger,
             "dev.steenbakker.mobile_scanner/scanner/deviceOrientation")
         deviceOrientationChannel!!.setStreamHandler(deviceOrientationListener)