Flutter Barcode_scan plugin crashing App?

Question

As Soon As I Click on The Camera Button The App Crashes.

It is not Asking For Any Permission Also.

I Have Included The Activity File in the Manifest Also

This is The Code I Am Using and The plugin I Am Using is barcode_scan:

Even After Searching a Lot I Am Unable To get to The Problem. Help Would Be Appreciated.

class _AuditPage extends State<AuditPage>{ String result = "Scan The Barcode!"; Future _scanQR() async{ try{ String qrCode = await BarcodeScanner.scan(); setState(() { result = qrCode; }); }on PlatformException catch (ex){ if(ex.code==BarcodeScanner.CameraAccessDenied){ setState(() { result="Camera Permission Was Denied"; }); }else{ setState(() { result="Unknown Error $ex!"; }); } } on FormatException { setState(() { result = "You Pressed The Back Button Before Scanning"; }); } catch (ex){ setState(() { result="Unknown Error $ex!"; }); } } @override Widget build(BuildContext context) { return Scaffold( resizeToAvoidBottomPadding: false, appBar: AppBar( title: Text("Bhaifi"), ), drawer: DrawerPage(), body: Center( child:Text( result, ), ), floatingActionButton:FloatingActionButton.extended( icon: Icon(Icons.camera_alt), label: Text("Scan"), onPressed: _scanQR, ), floatingActionButtonLocation:FloatingActionButtonLocation.centerFloat, ); } }

you want to take a look to AndroidX issue: I had a similar situation, you can grab some code from this post: stackoverflow.com/questions/55223002/… not the solution or the updates, but my troubleshooting in the original post; I hope it helps — Francesco Iapicca
– Francesco Iapicca, Commented Mar 25, 2019 at 8:28
try using the "old one": barcode_scan: ^0.0.8 , if doesn't work try without " ^ ": just "barcode_scan: 0.0.8" — Francesco Iapicca
– Francesco Iapicca, Commented Mar 25, 2019 at 9:30
do not specify the version of barcode_scan it will tack suitable version for you. — Viren V Varasadiya
– Viren V Varasadiya, Commented Mar 25, 2019 at 13:01

saeed foroughi · Accepted Answer · 2020-01-29 08:43:38Z

You're probably not adding the dependency in your AndroidManifest.xml folder, The same issue I had, Just modify scanQR() function.

Try this:

Future scanQR() async { try { String barcode; await BarcodeScanner.scan().then((onValue) { setState(() { barcode = onValue.toString(); }); }).catchError((onError) { print(onError); }); setState(() => this.barcode = barcode); } on PlatformException catch (e) { if (e.code == BarcodeScanner.CameraAccessDenied) { setState(() { this.barcode = 'camera permission not granted!'; }); } else { setState(() => this.barcode = 'Unknown error: $e'); } } on FormatException { setState(() => this.barcode = '(User returned)'); } catch (e) { setState(() => this.barcode = 'Unknown error: $e'); } }

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