Package com.google.zxing.qrcode
Class QRCodeReader
java.lang.Object
com.google.zxing.qrcode.QRCodeReader
- All Implemented Interfaces:
- Reader
- Direct Known Subclasses:
- QRCodeMultiReader
This implementation can detect and decode QR Codes in an image.
- Author:
- Sean Owen
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptiondecode(BinaryBitmap image) Locates and decodes a QR code in an image.final Resultdecode(BinaryBitmap image, Map<DecodeHintType, ?> hints) Locates and decodes a barcode in some format within an image.protected final Decodervoidreset()Resets any internal state the implementation has after a decode, to prepare it for reuse.
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Constructor Details- 
QRCodeReaderpublic QRCodeReader()
 
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Method Details- 
getDecoder
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decodepublic Result decode(BinaryBitmap image) throws NotFoundException, ChecksumException, FormatException Locates and decodes a QR code in an image.- Specified by:
- decodein interface- Reader
- Parameters:
- image- image of barcode to decode
- Returns:
- a String representing the content encoded by the QR code
- Throws:
- NotFoundException- if a QR code cannot be found
- FormatException- if a QR code cannot be decoded
- ChecksumException- if error correction fails
 
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decodepublic final Result decode(BinaryBitmap image, Map<DecodeHintType, ?> hints) throws NotFoundException, ChecksumException, FormatExceptionDescription copied from interface:ReaderLocates and decodes a barcode in some format within an image. This method also accepts hints, each possibly associated to some data, which may help the implementation decode.- Specified by:
- decodein interface- Reader
- Parameters:
- image- image of barcode to decode
- hints- passed as a- Mapfrom- DecodeHintTypeto arbitrary data. The meaning of the data depends upon the hint type. The implementation may or may not do anything with these hints.
- Returns:
- String which the barcode encodes
- Throws:
- NotFoundException- if no potential barcode is found
- ChecksumException- if a potential barcode is found but does not pass its checksum
- FormatException- if a potential barcode is found but format is invalid
 
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resetpublic void reset()Description copied from interface:ReaderResets any internal state the implementation has after a decode, to prepare it for reuse.
 
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