title: How to recreate the QR scanning from your phone's camera app
body: <p>I have a particular QR code I'm trying to create an app to read.</p>
  <p>I've installed the <a href="https://github.com/googlesamples/android-vision/tree/master/visionSamples/barcode-reader" rel="nofollow noreferrer">vision sample app from Google</a>, and it doesn't detect the QR code. When I use the QR scanner on my phone (by swiping down the notification drawer from the top), it also doesn't detect the QR code.</p>
  <p>The ZXing library doesn't work either.</p>
  <p>However, when I open the Camera app on my phone (Samsung S8), it detects the QR code just fine.</p>
  <p>Why are these different, and how do I recreate what the camera is doing?</p>