fixed android scan resolution

@@ -215,9 +215,9 @@ class MobileScanner(private val activity: Activity, private val textureRegistry:
                 // Build the analyzer to be passed on to MLKit
                 val analysisBuilder = ImageAnalysis.Builder()
                         .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
-                if (ratio != null) {
-                    analysisBuilder.setTargetAspectRatio(ratio)
-                }
+                        .setTargetResolution(preview!!.resolutionInfo?.resolution ?: Size(0, 0))
+
+                if (ratio != null) { analysisBuilder.setTargetAspectRatio(ratio) }
                 val analysis = analysisBuilder.build().apply { setAnalyzer(executor, analyzer) }
 
                 // Select the correct camera

-import 'dart:ui';
-
 import 'package:flutter/material.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 
@@ -37,6 +35,7 @@ class _BarcodeScannerWithScanWindowState
           return Stack(
             children: [
               MobileScanner(
+                fit: BoxFit.contain,
                 scanWindow: scanWindow,
                 controller: controller,
                 onDetect: (barcode, _) => setState(() {

@@ -145,7 +145,6 @@ class _MobileScannerState extends State<MobileScanner>
                   value.size,
                   Size(constraints.maxWidth, constraints.maxHeight),
                 );
-
                 controller.updateScanWindow(window);
               }