Java.Lang.NullPointerException When Attempting to Initialize ContentPage with Scanner #943
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If you go back to stable version 2.4.1, does the crash go away? |
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I circumvent this by considering the Scanner page a modal page, launched by whatever page needs to scan something, and closing it as soon as barcode is scanned. Parent/launching page interprets the barcode. (Version 2.4.1 and 3.1.0-beta2) |
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@knocte |
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At the end I removed a |
seansparkman
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… inside a ContentView If the `ZXingScannerView` was inside of a `ContentView` instead of a `ContentPage`, the application would crash by throwing a `Java.Lang.NullPointerException`. The `Context` passed to `ZXingScannerViewRenderer` via the constructor was actually a `ContextThemeWrapper` which does not inherit from `Activity`. Therefore when it was cast in the call of the constructor of `ZXingScannerView` in the renderer on Android, a `null` would be passed for a context instead. Fixes: Redth#943
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Version: 3.0.0-beta5
Platform: Android 10/API 29
Scanner initialization (in code behind):
Scanner XAML:
<Frame x:Name="QrCodeScanner" BorderColor="{StaticResource BorderColor}"/>When navigating to this particular page,
OnAppearing()is called, then immediately after, I get the following exception:Here is the full stack trace/debug output:
Let me know if I can provide any further clarification on this.
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