| Package | Description | 
|---|---|
| com.google.zxing.qrcode | |
| com.google.zxing.qrcode.decoder | |
| com.google.zxing.qrcode.encoder | 
| Class and Description | 
|---|
| Decoder The main class which implements QR Code decoding -- as opposed to locating and extracting
 the QR Code from an image. | 
| Class and Description | 
|---|
| ErrorCorrectionLevel See ISO 18004:2006, 6.5.1. | 
| Mode See ISO 18004:2006, 6.4.1, Tables 2 and 3. | 
| Version See ISO 18004:2006 Annex D | 
| Version.ECB Encapsulates the parameters for one error-correction block in one symbol version. | 
| Version.ECBlocks Encapsulates a set of error-correction blocks in one symbol version. | 
| Class and Description | 
|---|
| ErrorCorrectionLevel See ISO 18004:2006, 6.5.1. | 
| Mode See ISO 18004:2006, 6.4.1, Tables 2 and 3. | 
| Version See ISO 18004:2006 Annex D | 
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