程序包 ohos.agp.text

类 InputFilter

java.lang.Object

ohos.agp.text.InputFilter

直接已知子类:

CharInputFilter, LengthFilter, UpperCaseFilter

public abstract class InputFilter
extends Object

An abstract class that provides methods to filter the input text based on the specified criteria. The derived class needs to implement the filter(java.lang.CharSequence,ohos.agp.text.InputFilter.Range,java.lang.CharSequence,ohos.agp.text.InputFilter.Range) method. Both plain text and RichText are supported.

从以下版本开始:

7

嵌套类概要

嵌套类

限定符和类型	类	说明
static class	InputFilter.Range	Describes a text range where the index is greater than or equal to inStart and less than inEnd, as in other scenarios where text ranges are specified.

构造器概要

构造器

构造器	说明
InputFilter()

方法概要

限定符和类型	方法	说明
abstract 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

InputFilter

public InputFilter()

方法详细资料

filter

public abstract 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.

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.

从以下版本开始:

7