style: flutter lints

-import 'dart:ui';
-
 import 'package:flutter/material.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 

@@ -20,7 +20,7 @@ class _AnalyzeViewState extends State<AnalyzeView>
 
   // CameraController cameraController = CameraController(context, width: 320, height: 150);
 
-  String? barcode = null;
+  String? barcode;
 
   @override
   Widget build(BuildContext context) {
@@ -37,13 +37,13 @@ class _AnalyzeViewState extends State<AnalyzeView>
                   this.barcode = barcode.rawValue;
                   if (barcode.corners != null) {
                     ScaffoldMessenger.of(context).showSnackBar(SnackBar(
-                      content: Text('${barcode.rawValue}'),
+                      content: Text(barcode.rawValue),
                       duration: const Duration(milliseconds: 200),
                       animation: null,
                     ));
                     setState(() {
                       final List<Offset> points = [];
-                      double factorWidth = args.size.width / 520;
+                      // double factorWidth = args.size.width / 520;
                       // double factorHeight = wanted / args.size.height;
                       final size = MediaQuery.of(context).devicePixelRatio;
                       debugPrint('Size: ${barcode.corners}');
@@ -109,7 +109,7 @@ class OpenPainter extends CustomPainter {
   @override
   void paint(Canvas canvas, Size size) {
     var paint1 = Paint()
-      ..color = Color(0xff63aa65)
+      ..color = const Color(0xff63aa65)
       ..strokeWidth = 10;
     //draw points on canvas
     canvas.drawPoints(PointMode.points, points, paint1);

@@ -5,11 +5,8 @@
 // gestures. You can also use WidgetTester to find child widgets in the widget
 // tree, read text, and verify that the values of widget properties are correct.
 
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:mobile_scanner_example/main.dart';
-
 void main() {
   testWidgets('Verify Platform version', (WidgetTester tester) async {
     // Build our app and trigger a frame.

@@ -132,8 +132,9 @@ class MobileScannerController {
     final Map<String, dynamic>? startResult = await methodChannel
         .invokeMapMethod<String, dynamic>('start', arguments);
 
-    if (startResult == null)
+    if (startResult == null) {
       throw PlatformException(code: 'INITIALIZATION ERROR');
+    }
 
     hasTorch = startResult['torchable'];
     args.value = MobileScannerArguments(

@@ -490,7 +490,7 @@ enum BarcodeFormat {
   /// Barcode format constant for Data Matrix.
   ///
   /// Constant Value: 16
-  data_matrix,
+  dataMatrix,
 
   /// Barcode format constant for EAN-13.
   ///
@@ -510,17 +510,17 @@ enum BarcodeFormat {
   /// Barcode format constant for QR Code.
   ///
   /// Constant Value: 256
-  qr_code,
+  qrCode,
 
   /// Barcode format constant for UPC-A.
   ///
   /// Constant Value: 512
-  upc_a,
+  upcA,
 
   /// Barcode format constant for UPC-E.
   ///
   /// Constant Value: 1024
-  upc_e,
+  upcE,
 
   /// Barcode format constant for PDF-417.
   ///

@@ -29,7 +29,7 @@ BarcodeFormat toFormat(int value) {
     case 8:
       return BarcodeFormat.codebar;
     case 16:
-      return BarcodeFormat.data_matrix;
+      return BarcodeFormat.dataMatrix;
     case 32:
       return BarcodeFormat.ean13;
     case 64:
@@ -37,11 +37,11 @@ BarcodeFormat toFormat(int value) {
     case 128:
       return BarcodeFormat.itf;
     case 256:
-      return BarcodeFormat.qr_code;
+      return BarcodeFormat.qrCode;
     case 512:
-      return BarcodeFormat.upc_a;
+      return BarcodeFormat.upcA;
     case 1024:
-      return BarcodeFormat.upc_e;
+      return BarcodeFormat.upcE;
     case 2048:
       return BarcodeFormat.pdf417;
     case 4096:

 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:mobile_scanner/src/mobile_scanner.dart';
 
 void main() {
   const MethodChannel channel = MethodChannel('mobile_scanner');