Fixes #180 (#182)

.gitignore

@@ -13,3 +13,4 @@
 .externalNativeBuild
 .cxx
 .idea
+app/release

app/src/main/res/layout/fragment_camera.xml

@@ -16,14 +16,18 @@
   -->
 <androidx.constraintlayout.widget.ConstraintLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/camera_container"
     android:background="@android:color/black"
     android:layout_width="match_parent"
+    android:layoutDirection="ltr"
     android:layout_height="match_parent">
 
     <androidx.camera.view.PreviewView
         android:id="@+id/view_finder"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        android:layout_height="match_parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>