com.google.zxing
Class MultiFormatReader

java.lang.Object
  com.google.zxing.MultiFormatReader

All Implemented Interfaces:

Reader

public final class MultiFormatReader
extends Object
implements Reader

MultiFormatReader is a convenience class and the main entry point into the library for most uses. By default it attempts to decode all barcode formats that the library supports. Optionally, you can provide a hints object to request different behavior, for example only decoding QR codes.

Since:

BlackBerry API 6.0.0

Constructor Summary

MultiFormatReader()

Method Summary
Result	decode(BinaryBitmap image) This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it passes null as a hint to the decoders.
Result	decode(BinaryBitmap image, Hashtable hints) Decode an image using the hints provided.
Result	decodeWithState(BinaryBitmap image) Decode an image using the state set up by calling setHints() previously.
boolean	has1DReader()
boolean	has2DReader()
void	reset() Should be invoked after each call to decode in case the contained readers store state
void	setHints(Hashtable hints) This method adds state to the MultiFormatReader.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiFormatReader

public MultiFormatReader()

Since:

BlackBerry API 6.0.0

Method Detail

decode

public Result decode(BinaryBitmap image)
              throws NotFoundException

This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it passes null as a hint to the decoders. However, that makes it inefficient to call repeatedly. Use setHints() followed by decodeWithState() for continuous scan applications.

Specified by:

decode in interface Reader

Parameters:

image - The pixel data to decode

Returns:

The contents of the image

Throws:

NotFoundException - Any errors which occurred

Since:

BlackBerry API 6.0.0

decode

public Result decode(BinaryBitmap image,
                     Hashtable hints)
              throws NotFoundException

Decode an image using the hints provided. Does not honor existing state.

Specified by:

decode in interface Reader

Parameters:

image - The pixel data to decode

hints - The hints to use, clearing the previous state.

Returns:

The contents of the image

Throws:

NotFoundException - Any errors which occurred

Since:

BlackBerry API 6.0.0

decodeWithState

public Result decodeWithState(BinaryBitmap image)
                       throws NotFoundException

Decode an image using the state set up by calling setHints() previously. Continuous scan clients will get a large speed increase by using this instead of decode().

Parameters:

image - The pixel data to decode

Returns:

The contents of the image

Throws:

NotFoundException - Any errors which occurred

Since:

BlackBerry API 6.0.0

setHints

public void setHints(Hashtable hints)

This method adds state to the MultiFormatReader. By setting the hints once, subsequent calls to decodeWithState(image) can reuse the same set of readers without reallocating memory. This is important for performance in continuous scan clients.

Parameters:

hints - The set of hints to use for subsequent calls to decode(image)

Since:

BlackBerry API 6.0.0

has1DReader

public boolean has1DReader()

Since:

BlackBerry API 7.0.0

has2DReader

public boolean has2DReader()

Since:

BlackBerry API 7.0.0

reset

public void reset()

Should be invoked after each call to decode in case the contained readers store state

Since:

BlackBerry API 7.0.0