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...The format of the code to be recognized can be customized (see the onClick method in TestScanActivity for detailed usage). Can control the flash, convenient to use at night. Can be set to scan with the front camera. Two-finger zoom preview. Can monitor the ambient brightness and prompt the user to turn on and off the flash. Automatically zoom in when a smaller code is recognized. ZXing generates a QR code with customizable color and logo. ZXing generates one-dimensional codes. ZXing scan barcode, QR code. ZXing recognizes barcode and QR code images in the gallery.