.Net 8 Maui Blazor Camera not openining only white screen is coming

[rajeshsws]

@JimmyPun610 My code was working fine in .NET 7 after converting to .NET 8, camera is not coming. After debugging i found this error.

[Camera2CameraImpl] {Camera@e772f28[id=0]} Cancelling scheduled re-open: androidx.camera.camera2.internal.Camera2CameraImpl$StateCallback$ScheduledReopen@38257a1 [Camera2CameraImpl] {Camera@e772f28[id=0]} Opening camera. [Camera2CameraImpl] {Camera@e772f28[id=0]} Transitioning camera internal state: REOPENING --> OPENING [CameraStateMachine] New public camera state CameraState{type=OPENING, error=null} from OPENING and null [UseCaseAttachState] All use case: [androidx.camera.core.Preview-68f3ec60-8011-42e7-8d23-537ef72376266181736, androidx.camera.core.ImageAnalysis-4335fd4e-fba8-4474-b350-79a70e9ed249146636903] for camera: 0 [CameraManager] Using legacy camera HAL. [Camera2CameraImpl] {Camera@e772f28[id=0]} Unable to open camera due to Lacking privileges to access camera service [Camera2CameraImpl] {Camera@e772f28[id=0]} Transitioning camera internal state: OPENING --> REOPENING [CameraStateMachine] New public camera state CameraState{type=OPENING, error=null} from OPENING and null [Camera2CameraImpl] Camera reopening attempted for 10000ms without success. [Camera2CameraImpl] {Camera@e772f28[id=0]} Transitioning camera internal state: REOPENING --> PENDING_OPEN

Permission is already given in menifest file

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />

Below is my xmal code <?xml version="1.0" encoding="utf-8" ?> <mct:Popup xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

         xmlns:mct="clr-namespace:CommunityToolkit.Maui.Views;assembly=CommunityToolkit.Maui"

        xmlns:GV="clr-namespace:BarcodeScanner.Mobile;assembly=BarcodeScanner.Mobile.Maui"

         x:Class="ProX.MauiPages.PopUpScanner">
<ScrollView >
    <VerticalStackLayout >

        <GV:CameraView VibrationOnDetected="True" 
                       WidthRequest="250" HeightRequest="350" 
                       HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" OnDetected="GoogleCamera_OnDetected"   TorchOn="False"  x:Name="GoogleCamera">

        </GV:CameraView>

        <Switch IsToggled="true"  VerticalOptions="Center"  HorizontalOptions="Center" x:Name="Switch" Toggled="Switch_Toggled" OnColor="Orange" ThumbColor="Green"/>
    </VerticalStackLayout>
</ScrollView>

</mct:Popup>

Code behind private void GoogleCamera_OnDetected(object sender, BarcodeScanner.Mobile.OnDetectedEventArg e) {

  List<BarcodeResult> obj = e.BarcodeResults;
      string result = string.Empty;
      for (int i = 0; i < obj.Count; i++)
      {
          result += obj[i].DisplayValue.ToString();
          break;
      }
      SecureStorage.Default.SetAsync("Camera", Switch.IsToggled.ToString());
      this.Close(result);
      GoogleCamera.IsScanning = false;

}

[rajeshsws]

Firebase.Core.resources/GoogleUtilitiesComponents.xcframework/ios-arm64/GoogleUtilitiesComponents.framework/GoogleUtilitiesComponents : warning MT7091: The framework C:\Users\shoky.nuget\packages\xamarin.firebase.ios.core\8.10.0.3\lib\net6.0-ios15.4\Firebase.Core.resources\GoogleUtilitiesComponents.xcframework\ios-arm64\GoogleUtilitiesComponents.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKBarcode-1.6.0/Frameworks/MLKitBarcodeScanning.framework/MLKitBarcodeScanning : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKBarcode-1.6.0\Frameworks\MLKitBarcodeScanning.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKMDD-3.0.0/Frameworks/MLKitMDD.framework/MLKitMDD : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKMDD-3.0.0\Frameworks\MLKitMDD.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKVision-3.0.0/Frameworks/MLKitVision.framework/MLKitVision : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKVision-3.0.0\Frameworks\MLKitVision.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLImg-1.0.0beta2/Frameworks/MLImage.framework/MLImage : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLImg-1.0.0beta2\Frameworks\MLImage.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKCore-5.0.0/Frameworks/MLKitCommon.framework/MLKitCommon : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKCore-5.0.0\Frameworks\MLKitCommon.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/GAppM-8.9.1/GoogleAppMeasurement-8.9.1/Frameworks/GoogleAppMeasurement.xcframework/ios-arm64_armv7/GoogleAppMeasurement.framework/GoogleAppMeasurement : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\GAppM-8.9.1\GoogleAppMeasurement-8.9.1\Frameworks\GoogleAppMeasurement.xcframework\ios-arm64_armv7\GoogleAppMeasurement.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKBarcode-1.6.0/Frameworks/MLKitBarcodeScanning.framework/MLKitBarcodeScanning : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKBarcode-1.6.0\Frameworks\MLKitBarcodeScanning.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKMDD-3.0.0/Frameworks/MLKitMDD.framework/MLKitMDD : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKMDD-3.0.0\Frameworks\MLKitMDD.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKVision-3.0.0/Frameworks/MLKitVision.framework/MLKitVision : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKVision-3.0.0\Frameworks\MLKitVision.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLImg-1.0.0beta2/Frameworks/MLImage.framework/MLImage : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLImg-1.0.0beta2\Frameworks\MLImage.framework is a framework of static libraries, and will not be copied to the app. 1>C:/Users/shoky/AppData/Local/XamarinBuildDownloadCache/MLKCore-5.0.0/Frameworks/MLKitCommon.framework/MLKitCommon : warning MT7091: The framework C:\Users\shoky\AppData\Local\XamarinBuildDownloadCache\MLKCore-5.0.0\Frameworks\MLKitCommon.framework is a framework of static libraries, and will not be copied to the app.

[rajeshsws]

[Camera2CameraImpl] {Camera@d7b3fa[id=0]} Unable to open camera due to validateClientPermissionsLocked:1167: Caller "com.companyname.testcam" (PID 10399, UID 7119) cannot open camera "0" without camera permission [Camera2CameraImpl] {Camera@d7b3fa[id=0]} Transitioning camera internal state: OPENING --> REOPENING [CameraStateMachine] New public camera state CameraState{type=OPENING, error=null} from OPENING and null [Camera2CameraImpl] Camera reopening attempted for 10000ms without success. [Camera2CameraImpl] {Camera@d7b3fa[id=0]} Transitioning camera internal state: REOPENING --> PENDING_OPEN

[rajeshsws]

My Problem is solved

[rbev]

My Problem is solved

How was your problem solved? It's generally useful to let others know what the fix is.

[rajeshsws]

Under platform folder, in android main activity, you need to give permission for camera in .net 8, public class MainActivity : MauiAppCompatActivity { protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState);

     Task<bool> allowed =  BarcodeScanner.Mobile.Methods.AskForRequiredPermission();

 }

}

Hope this will resolve your problem