Decoder

java.lang.Object
- com.google.zxing.qrcode.decoder.Decoder

```
public final class Decoder
extends Object
```
The main class which implements QR Code decoding -- as opposed to locating and extracting the QR Code from an image.

Constructor Summary

Constructors

Constructor and Description
`Decoder()`

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`DecoderResult`	`decode(BitMatrix bits)`
`DecoderResult`	`decode(BitMatrix bits, Map<DecodeHintType,?> hints)` Decodes a QR Code represented as a `BitMatrix`.
`DecoderResult`	`decode(boolean[][] image)`
`DecoderResult`	`decode(boolean[][] image, Map<DecodeHintType,?> hints)` Convenience method that can decode a QR Code represented as a 2D array of booleans.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Decoder
```
public Decoder()
```
- Method Detail
  - decode
```
public DecoderResult decode(boolean[][] image)
                     throws ChecksumException,
                            FormatException
```
    Throws:
    
    ChecksumException
    
    FormatException
  - decode
```
public DecoderResult decode(boolean[][] image,
                            Map<DecodeHintType,?> hints)
                     throws ChecksumException,
                            FormatException
```
    Convenience method that can decode a QR Code represented as a 2D array of booleans. "true" is taken to mean a black module.
    
    Parameters:
    
    image - booleans representing white/black QR Code modules
    
    hints - decoding hints that should be used to influence decoding
    
    Returns:
    
    text and bytes encoded within the QR Code
    
    Throws:
    
    FormatException - if the QR Code cannot be decoded
    
    ChecksumException - if error correction fails
  - decode
```
public DecoderResult decode(BitMatrix bits)
                     throws ChecksumException,
                            FormatException
```
    Throws:
    
    ChecksumException
    
    FormatException
  - decode
```
public DecoderResult decode(BitMatrix bits,
                            Map<DecodeHintType,?> hints)
                     throws FormatException,
                            ChecksumException
```
    Decodes a QR Code represented as a BitMatrix. A 1 or "true" is taken to mean a black module.
    
    Parameters:
    
    bits - booleans representing white/black QR Code modules
    
    hints - decoding hints that should be used to influence decoding
    
    Returns:
    
    text and bytes encoded within the QR Code
    
    Throws:
    
    FormatException - if the QR Code cannot be decoded
    
    ChecksumException - if error correction fails

Class Decoder

Constructor Summary

Constructors

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Decoder

Method Detail

decode

decode

decode

decode