com.google.zxing

类 MultiFormatReader

java.lang.Object

com.google.zxing.MultiFormatReader

所有已实现的接口:

Reader

public final class MultiFormatReader
extends java.lang.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.

作者:

Sean Owen, dswitkin@google.com (Daniel Switkin)

构造器概要

构造器

构造器和说明
MultiFormatReader()

方法概要

限定符和类型	方法和说明
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, java.util.Map<DecodeHintType,?> hints) Decode an image using the hints provided.
Result	decodeWithState(BinaryBitmap image) Decode an image using the state set up by calling setHints() previously.
void	reset() Resets any internal state the implementation has after a decode, to prepare it for reuse.
void	setHints(java.util.Map<DecodeHintType,?> hints) This method adds state to the MultiFormatReader.

从类继承的方法 java.lang.Object

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

构造器详细资料

MultiFormatReader

public MultiFormatReader()

方法详细资料

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.

指定者:

decode 在接口中 Reader

参数:

image - The pixel data to decode

返回:

The contents of the image

抛出:

NotFoundException - Any errors which occurred

decode

public Result decode(BinaryBitmap image,
                     java.util.Map<DecodeHintType,?> hints)
              throws NotFoundException

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

指定者:

decode 在接口中 Reader

参数:

image - The pixel data to decode

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

返回:

The contents of the image

抛出:

NotFoundException - Any errors which occurred

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().

参数:

image - The pixel data to decode

返回:

The contents of the image

抛出:

NotFoundException - Any errors which occurred

setHints

public void setHints(java.util.Map<DecodeHintType,?> 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.

参数:

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

reset

public void reset()

从接口复制的说明: Reader

Resets any internal state the implementation has after a decode, to prepare it for reuse.

指定者:

reset 在接口中 Reader