Scanning QR code using Google Mobile Vision API Add the following GMS dependency to your app level build.gradle. Not the answer you're looking for? App want to access your PhotoLibrary. It will return a available camera, (not necessary the rear camera that you always desires). @Redth this issue has reopened in version 2.3.2. If your application does not allow the user to choose which camera to use, it is an option. If anyone reads this, the requirement is to now to install both ZXing Nuget Packages for .Mobile and .Mobile.Forms. We have a problem with the ZXing Barcodescanner for Xamarin.Forms. In Activity B call C: Intent showC = new Intent (ActivityC); showC.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT); startActivity(showC); finish(); //Close Activity B Copy Then add a Camera Permission in info.plist file like this. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. zxingControl = new ZXingScannerView { HorizontalOptions = LayoutOptions.Center, VerticalOptions = LayoutOptions.FillAndExpand, AutomationId = "zxingScannerView", IsEnabled = true }; zxingControl.OnScanResult += (result) => Device.BeginInvokeOnMainThread (async () => { // Stop analysis until we navigate away so we don't keep reading barcodes … Will this ever be fixed in the public nuget release? Anyone have ideas about this? On iOS and Windows Phone neither the ZXingScannerPage nor a custom page using a ZXingScannerView displays a camera picture whereas both the ZXingScannerPage and the custom page are displaying correctly in an Android emulator. { 531), Introducing a new close reason specifically for non-English questions, We’re bringing advertisements for technology courses to Stack Overflow, Read camera permission for iOS in Xamarin, Xamarin iOS ZXing Barcode read using front camera issue, Xamarin Forms iOS Location Permission(Always Allow), Manhwa about a girl who got eaten by a snake protecting her sister. I did something that I thought would work very nice, but after reading this post it seems like it's never going to work. I have the same problem, version 2.4.1, Xamarin Forms, Android. Sign in It only crashe when i use ZXingScannerView instead of ZXingScannerPage. C# var response = await CrossPermissions.Current.RequestPermissionsAsync (Permission.Calendar); If the User has denied the permission, you might not be able to request for permissions again. . Install the plugin, in your PCL or .NET Standard Library, if applicable, and all your native Xamarin projects that you have. Please try and open a new issue if you still have problems. On iOS, we need to add a key to the info.plist file. Tap on Permissions to see everything the app has. Please allow access to the camera to scan barcodes, Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Twitter (Opens in new window), Click to email a link to a friend (Opens in new window), https://github.com/jfversluis/ZXingSample, https://github.com/Redth/ZXing.Net.Mobile, Learn more about bidirectional Unicode characters, Dew Drop - August 23, 2018 (#2788) - Morning Dew, Customize the Tab Bar “More” Title with .NET MAUI on Android, MediaElement for .NET MAUI: Early Preview, Looping iOS Remote Simulator Connection Issue with .NET MAUI, Git Rebase: Don't be Afraid of the Force (Push), Implement Folder Picker with .NET MAUI, WinUI and macOS. Minimum number of pairings that make all quadruples. Overview. Player wants to play their one favorite character and nothing else, but that character can't work in this setting, Travel reimbursement for grant: The lab doesn't want to provide bank account details, NEC Question about laundry area 210.52(f), How to rename List of Tables? RequestPermissionsAsync method can be used to request for any particular permissions. The event is identical. For iOS it is roughly the same, only here you will need just the line of initialization code. I'm not sure what you mean with "privacy". Can any one suggest me is there any way to scan the qr code after giving permissions. I will revert to ZXing version 2.3.2 since the problem does not happen for me with that version. There's not an issue on iOS with ZXingScannerView. One of them is Scandit, that also has libraries available for Xamarin. This property does not work. Adding await Task.Delay(1000); after manually requesting camera permissions (all prior to starting the scanner) works around the problem. @thedee. By clicking “Sign up for GitHub”, you agree to our terms of service and This is also happening for me on 2.4.1, I've reverted to 2.3.2 for now as well. Yes. The latest version of ZXing.Net.Mobile gives you the option of using this instead of the ZXing scanning engine. I'm having a similar problem in iOS. Testing Devices Model The problem is fixed in 2.3.2 as well. What I observed with version 2.4.1 was that the camera was enabled and scan would occur after permissions were granted, but the first scan would always fail. @LucasZhang said: And Zxing ScanPage showed, But it just graycolor view. Application crashes when asking for permissions [Xamarin.Forms.Android]. Once a permission is requested and denied a pop-up will no longer appear if you request the permission a second time. TL;DR you can find the sample code for this post here: https://github.com/jfversluis/ZXingSample, Update Aug. 2019: I have recorded a live coding session that handles this implementation. The following initialization code was missing in my projects: Android: ZXing.Net.Mobile.Forms.Android.Platform.Init(); The scanner appears, but it is not enabled - white screen. Issue I received a mail from Google warning me about "REQUEST_INSTALL_PACKAGES" permission. Make sure that you install it by hand because it is needed. Why? @TonyC5 tested. The number 5964 is printed in the negative. you can check out this helpful ZXing Wiki. Already on GitHub? Another workaround which I was using before, was to call the native navigator.mediaDevices.getUserMedia function first so the camera access can be accepted, after which the deviceID can be set using "navigator.mediaDevices.enumerateDevices()". At this point iOS should behave like Android in providing deviceIds. In the ZXing package, there is a ZXingScanningPage for you to use. So the whole OnRequestPermissionsResult is now like. Thanks for contributing an answer to Stack Overflow! ,java,android,zxing,Java,Android,Zxing,基本上，我要做的是切换活动（历史记录列表），并能够恢复扫描。 它切换活动，恢复扫描仪视图，但不再扫描。 当我关闭并重新打开应用程序时，我只会看到一个空白的白色屏幕，上面有应用程序名称和一个： W/CameraBase:连接到 . ZXingScannerView.HasTorch delivers false on a real iOS device (iPhone 6s Plus with iOS 9.2). 我试图在谷歌眼镜上使用zxing，但是我收到了上面的错误。我使用的是zstar 2.2core.jar我也在设备显示屏上收到了这个错误信息"对不起，Android相机遇到了问题。您可能需要重新启动设备"。我正在开始我的oncreate活动protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);Intent inte So thanks for that. How about when installed from AppStore? What's the true fix? Can the phrase "bobbing in the water" be used to say a person is struggling? For iOS projects open AppDelegate.cs and add the below code to the class. Try in Visual Studio menu bar Build ➤ Rebuild Solution, Reopen Visual Studio and Run your app again. cam screen is white. ZXing.Net Mobile is available for your traditional Xamarin applications as both a component and a NuGet package that can be installed in your iOS, Android, Windows, and PCL projects. Does Earth's core actually turn "backwards" at times? using ZXing.Net.Mobile.Forms; namespace QRCOdes I have never notice that and had no idea that was happening, maybe because the script had a very weak flow in some points. scan page is openinng but camera not detecting in iOS. The scanner does scan barcodes on IOS if I hold them in front of the camera but the camera preview is just a white background. You can do this by using the following assembly level attribute: In your AppDelegate's FinishedLaunching (..) implementation, call: In your main Page's constructor, you should add: If you notice that finishing scanning or pressing the back button is causing your Page to jump back further than you'd like, or if you're having trouble updating the UI of a Page after scanning is completed, you may need to set NavigationCacheMode="Enabled" within your Page's XAML element. https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia, https://zxing-js.github.io/library/examples/qr-camera/, https://stackblitz.com/edit/zxing-ngx-scanner, https://stackblitz.com/edit/zxing-scanner-react?file=Hello.js, Selfie cam instead of rear cam on iPhone 11 / iOS 13, https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo. { Camera is only available on real device. You also have the opportunity to customize the top and bottom text that appears in this overlay. You can implement it yourself until this is fixed by creating a ZXingScannerViewRenderer subclass on each platform and manually setting the property there. Remember that you need to install the package on both your shared code project as well as your platform projects. Since I don't need the user to choose between camera source. And to be clear there is not an issue when using ZXingScannerPage so i use it in my latest version but still would like to use the ZXingScannerView. navigator.mediaDevices.enumerateDevices() gives back the media devices, but they deviceId is an empty string. Thanks. The same bug exists when downloading from Google Play, start debugging on device, start without debugging on device. ZXing.Net.Mobile is a C#/.NET library based on the open source Barcode Library: ZXing (Zebra Crossing), using the ZXing.Net Port. You can see what that looks like in the code snippet underneath. Login to edit/delete your existing comments, Hi James, Thanks! What to do? Nethertheless I found that using "ZXingScannerView.ToggleTorch()" works. Install-Package Xam.Plugin.Media Next, we need to ensure we initialize and provide certain permissions on specific platforms. I will fork off your repo and see if that works for me. Scanning & generating barcodes in Xamarin.Forms. Ensure that you add the package or NuGet to all of your projects to get started. All code used in this post can be found in a working sample on my GitHub account: https://github.com/jfversluis/ZXingSample. We’ll occasionally send you account related emails. So this is likely not a problem with the library, but just a correction has to be made on the samples. The thing is that currently these permissions are asked the first time the users enters a videocall and that causes delay and bugs on the videocall flow. Does 'dead position' consider 75 moves rule? To get the results I have to go back and open the page again. You signed in with another tab or window. The problem I observed with ZXing version 2.4.1 was not due to the override (since I have this in both my iOS and Android specific code for my Xamarin.Forms PCL solution). Name your app, select "Use Portable Class Library" for shared code, and target both - Android and iOS. It works with Xamarin.iOS, Xamarin.Android, Tizen, and UWP. Well, that's new. And created a playlist with some videos about generating and scanning barcodes. global::ZXing.Net.Mobile.Android.PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults); Possible (inaccurate) solution is replace in module CameraController.cs string You can do this when the OnScanResult event is fired to stop scanning, pop the scanner page, and check the result: On Android ZXing.Net requires the Camera and Flashlight permission to function, so you’ll need to check these permissions in the project settings or add them to your Android Manifest: When Android Marshmallow was released it added new runtime permissions when apps need to use features such as the camera or geolocation, similar to iOS. Same here, I tried replacing the deviceIds that are "" with plain undefined to decodeFromInputVideoDevice hoping it'll use the "facingMode" constraint but still not working (I don't really have an iPhone to debug more). Thanks for the update. in the Unity community. — Is this a case of ellipsis? Why can't we spell a diminished 3rd or an augmented 5th using only the notes in a major scale? You have to check the device id not only for undefined but empty string also. Has to be fixed. Then, if you trying to enable your scanner in OnResume - it will not work. @knocte - are you developing an Android app or a PCL App (portable for Android and iOS)? We are using Prism.Forms for MVVM. This will automatically update the AndroidManifest.xml file. I also found the following solution to check camera access on iOS (until now I am using static access rights on Android (= declared in AndroidManifest.xml) and Windows Phone (= declared in WMAppManifest.xml)): So the only remaining issues are 2 and 3. Now open up the camera app and point it at a QR Code. The simplest example of using ZXing.Net.Mobile looks something like this: For Xamarin Forms there is a bit more setup needed. all three projects (Android, IOS and portable). It works to me! App want to access your Microphone It’s a quick and easy way to store and read information or show a unique identifier on an object. The Flashlight and Camera permissions are required and must be configured in the Android project. There are some other (paid) alternatives. I manage to force using the back camera. (Y). Have a question about this project? The value of this key needs to be a description that is shown to the user. The root cause of issue is because iOS and Android handle the official HTML5 API call navigator.mediaDevices.enumerateDevices() differently, which is called by the method getVideoInputDevices of BrowserCodeReader.ts Line 90. If I give permission as allow it is scanning continuously but not returning any results . ZXing.NET Mobile (Zebra crossing) is an open source library that makes scanning barcodes as effortless and painless as possible in your Xamarin and Xamarin.Forms applications. Nevertheless, if you put a little delay before scanner activation code - it should works. So I came across the same problem and I was able to find a temporary workaround until this issue is solved. Here is my working ZXing code section, based on your example: Ele roda em cima dessa biblioteca: https://github.com/zxing-js/ngx-scanner. By clicking “Sign up for GitHub”, you agree to our terms of service and Is there anything special to do ios project? { [1] https://developer.mozilla.org/en-US/docs/Web/API/MediaDeviceInfo.
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