DecodeHintType

java.lang.Object
- java.lang.Enum<DecodeHintType>
- - com.google.zxing.DecodeHintType

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<DecodeHintType>
```
public enum DecodeHintType
extends java.lang.Enum<DecodeHintType>
```
Encapsulates a type of hint that a caller may pass to a barcode reader to help it more quickly or accurately decode it. It is up to implementations to decide what, if anything, to do with the information that is supplied.

作者:

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

另请参阅:

Reader.decode(BinaryBitmap,java.util.Map)

枚举常量概要

枚举常量
枚举常量和说明
`ALLOWED_EAN_EXTENSIONS` Allowed extension lengths for EAN or UPC barcodes.
`ALLOWED_LENGTHS` Allowed lengths of encoded data -- reject anything else.
`ASSUME_CODE_39_CHECK_DIGIT` Assume Code 39 codes employ a check digit.
`ASSUME_GS1` Assume the barcode is being processed as a GS1 barcode, and modify behavior as needed.
`CHARACTER_SET` Specifies what character encoding to use when decoding, where applicable (type String)
`NEED_RESULT_POINT_CALLBACK` The caller needs to be notified via callback when a possible `ResultPoint` is found.
`OTHER` Unspecified, application-specific hint.
`POSSIBLE_FORMATS` Image is known to be of one of a few possible formats.
`PURE_BARCODE` Image is a pure monochrome image of a barcode.
`RETURN_CODABAR_START_END` If true, return the start and end digits in a Codabar barcode instead of stripping them.
`TRY_HARDER` Spend more time to try to find a barcode; optimize for accuracy, not speed.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`java.lang.Class<?>`	`getValueType()`
`static DecodeHintType`	`valueOf(java.lang.String name)` 返回带有指定名称的该类型的枚举常量。
`static DecodeHintType[]`	`values()` 按照声明该枚举类型的常量的顺序, 返回包含这些常量的数组。

从类继承的方法 java.lang.Enum
compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- 枚举常量详细资料
  - OTHER
```
public static final DecodeHintType OTHER
```
    Unspecified, application-specific hint. Maps to an unspecified Object.
  - PURE_BARCODE
```
public static final DecodeHintType PURE_BARCODE
```
    Image is a pure monochrome image of a barcode. Doesn't matter what it maps to; use Boolean.TRUE.
  - POSSIBLE_FORMATS
```
public static final DecodeHintType POSSIBLE_FORMATS
```
    Image is known to be of one of a few possible formats. Maps to a List of BarcodeFormats.
  - TRY_HARDER
```
public static final DecodeHintType TRY_HARDER
```
    Spend more time to try to find a barcode; optimize for accuracy, not speed. Doesn't matter what it maps to; use Boolean.TRUE.
  - CHARACTER_SET
```
public static final DecodeHintType CHARACTER_SET
```
    Specifies what character encoding to use when decoding, where applicable (type String)
  - ALLOWED_LENGTHS
```
public static final DecodeHintType ALLOWED_LENGTHS
```
    Allowed lengths of encoded data -- reject anything else. Maps to an int[].
  - ASSUME_CODE_39_CHECK_DIGIT
```
public static final DecodeHintType ASSUME_CODE_39_CHECK_DIGIT
```
    Assume Code 39 codes employ a check digit. Doesn't matter what it maps to; use Boolean.TRUE.
  - ASSUME_GS1
```
public static final DecodeHintType ASSUME_GS1
```
    Assume the barcode is being processed as a GS1 barcode, and modify behavior as needed. For example this affects FNC1 handling for Code 128 (aka GS1-128). Doesn't matter what it maps to; use Boolean.TRUE.
  - RETURN_CODABAR_START_END
```
public static final DecodeHintType RETURN_CODABAR_START_END
```
    If true, return the start and end digits in a Codabar barcode instead of stripping them. They are alpha, whereas the rest are numeric. By default, they are stripped, but this causes them to not be. Doesn't matter what it maps to; use Boolean.TRUE.
  - NEED_RESULT_POINT_CALLBACK
```
public static final DecodeHintType NEED_RESULT_POINT_CALLBACK
```
    The caller needs to be notified via callback when a possible ResultPoint is found. Maps to a ResultPointCallback.
  - ALLOWED_EAN_EXTENSIONS
```
public static final DecodeHintType ALLOWED_EAN_EXTENSIONS
```
    Allowed extension lengths for EAN or UPC barcodes. Other formats will ignore this. Maps to an int[] of the allowed extension lengths, for example [2], [5], or [2, 5]. If it is optional to have an extension, do not set this hint. If this is set, and a UPC or EAN barcode is found but an extension is not, then no result will be returned at all.
- 方法详细资料
  - values
```
public static DecodeHintType[] values()
```
    按照声明该枚举类型的常量的顺序, 返回包含这些常量的数组。该方法可用于迭代常量, 如下所示:
```
for (DecodeHintType c : DecodeHintType.values())
    System.out.println(c);
```
    返回:
    
    按照声明该枚举类型的常量的顺序返回的包含这些常量的数组
  - valueOf
```
public static DecodeHintType valueOf(java.lang.String name)
```
    返回带有指定名称的该类型的枚举常量。字符串必须与用于声明该类型的枚举常量的标识符完全匹配。(不允许有多余的空格字符。)
    
    参数:
    
    name - 要返回的枚举常量的名称。
    
    返回:
    
    返回带有指定名称的枚举常量
    
    抛出:
    
    java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量
    
    java.lang.NullPointerException - 如果参数为空值
  - getValueType
```
public java.lang.Class<?> getValueType()
```

枚举 DecodeHintType

枚举常量概要

方法概要

从类继承的方法 java.lang.Enum

从类继承的方法 java.lang.Object

枚举常量详细资料

OTHER

PURE_BARCODE

POSSIBLE_FORMATS

TRY_HARDER

CHARACTER_SET

ALLOWED_LENGTHS

ASSUME_CODE_39_CHECK_DIGIT

ASSUME_GS1

RETURN_CODABAR_START_END

NEED_RESULT_POINT_CALLBACK

ALLOWED_EAN_EXTENSIONS

方法详细资料

values

valueOf

getValueType