程序包 ohos.agp.text

类 UpperCaseFilter

java.lang.Object

ohos.agp.text.InputFilter

ohos.agp.text.UpperCaseFilter

public final class UpperCaseFilter
extends InputFilter

Implements an uppercase character filter, which supports filtering of plain text and RichText.

When lowercase characters exist in the text to be filtered, they will be converted to uppercase if the corresponding uppercase characters exist in the specified Locale.

从以下版本开始:

7

嵌套类概要

从类继承的嵌套类/接口 ohos.agp.text.InputFilter

InputFilter.Range

构造器概要

构造器

构造器	说明
UpperCaseFilter()	A constructor used to create an UpperCaseFilter instance based on the current Locale.
UpperCaseFilter(String locale)	A constructor used to create an UpperCaseFilter instance based on a specified locale.

方法概要

限定符和类型	方法	说明
CharSequence	filter(CharSequence source, InputFilter.Range sourceRange, CharSequence dest, InputFilter.Range destRange)	Filters the input text, which can be plain text or RichText.

从类继承的方法 java.lang.Object

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

构造器详细资料

UpperCaseFilter

public UpperCaseFilter()

A constructor used to create an UpperCaseFilter instance based on the current Locale.

从以下版本开始:

7

UpperCaseFilter

public UpperCaseFilter(String locale)

A constructor used to create an UpperCaseFilter instance based on a specified locale.

参数:

locale - Indicates the Locale. If the value is not empty, it must be a valid character string representing Locale, for example, "en_US"

从以下版本开始:

7

方法详细资料

filter

public CharSequence filter(CharSequence source,
                           InputFilter.Range sourceRange,
                           CharSequence dest,
                           InputFilter.Range destRange)

Filters the input text, which can be plain text or RichText. If the source is rich text, the text itself will change. In other cases, the text will not change. Depending on the derived class of InputFilter, determine whether to pass null to dest and destRange. For example, pass null if the derived class is CharInputFilter or UpperCaseFilter. For LengthFilter, do not pass null to dest and destRange, because these two parameters restrict the source text together with sourceRange.

指定者:

filter 在类中 InputFilter

参数:

source - Indicates that source strings to be filtered.

sourceRange - Indicates the filtering range of the source text. Only text in this range is filtered.

dest - Indicates the destination text.

destRange - Indicates the filtering range of the destination text.

返回:

Returns text after filtering; returns null if the input source text is null or the specified Range is invalid.