android - Xamarin Forms QR code scanner blank screen -

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i have xamarin forms 2.0 application uses zxing.net.mobile , zxing.net.mobile.forms version 2.0.3.1. i'm trying build simple qr code scanner, whenever launch zxingscannerpage on android can see default overlay (with text , red line) don't see output of camera can't scan anything. have listed camera permission in androidmanifest:

<uses-permission android:name="android.permission.camera" />

i tried sample code readme: https://github.com/redth/zxing.net.mobile samples/forms project. have code:

private async void onscanqrclicked(object sender, eventargs e) {     _scannerpage = new zxingscannerpage();     _scannerpage.onscanresult += handlescanresult;      await navigation.pushasync(_scannerpage); }  private void handlescanresult(result result) {     _scannerpage.isscanning = false;      device.begininvokeonmainthread(() =>     {         navigation.popasync();         displayalert("scanned code", result.text, "ok");     }); }

some more specs: i'm running android 5.1 on moto g (v1).

why not seeing output of camera?

i fixed getting rid of zxing.net.mobile.forms , downgrading zxing.net.mobile 2.0 1.5. had change implementation, relatively easy.

another thing people may @ in future (i didn't try it) adding flashlight permission: https://github.com/redth/zxing.net.mobile/issues/227.


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