title: I installed my application on a handheld terminal, but I cannot read barcodes from its camera
body: <p>I have installed my application on a handheld terminal, but I cannot read barcodes from its camera. The camera turns on, but there is no reaction when the barcode is read.
  The package I use is flutter_barcode_scanner.
  Can you help me what is the cause of this problem?</p>