程序包 ohos.agp.components

接口 Text.TextObserver

所有已知实现类:

ListContainer, PhoneNumberFormattingTextObserver

封闭类:

Text

public static interface Text.TextObserver

Provides a text observer to observe text changes in a component.

The onTextUpdated(java.lang.String, int, int, int) method in this class is called each time the text changes.

方法概要

限定符和类型	方法	说明
void	onTextUpdated(String text, int start, int before, int count)	Called back when the text is changed.

方法详细资料

onTextUpdated

void onTextUpdated(String text,
                   int start,
                   int before,
                   int count)

Called back when the text is changed.

This method is used to process the changed text, for example, to verify the input LOV to get LOVE, for which text is LOVE, start is 3, before is 3, and count is 1.

参数:

text - Indicates the current text.

start - Indicates the start position of the text to be added.

before - Indicates the length of the old text.

count - Indicates the length of the text to be added.

从以下版本开始:

4