AndroidAnnotations——TextChangeEvents文本改变事件

AndroidAnnotation

目录(?)[+]

TextChangeEvents

Since AndroidAnnotations 2.6

@TextChange

This annotation is intended to be used on methods to receive events defined by

android.text.TextWatcher.onTextChanged(CharSequence
s, int start, int before, int count)

when the text is changed on the targeted TextView or subclass of TextView. The annotation value should be one or several

R.id.*

fields
that refers to TextView or subclasses of TextView. If not set, the method name will be used as the

R.id.*

field
name. The method may have multiple parameter:

这个注释表明，当TextView或者其子类的文本值改变时，加了注解的方法就可以接收由

android.text.TextWatcher.onTextChanged(CharSequence
s, int start, int before, int count)

定义的改变事件。注解值应该是一个或多个引用了TextView或者其子类的

R.id.*

字段。如果没有设置，那么会用方法名作为

R.id.*

。该方法可以有多个参数：

A

android.widget.TextView

parameter
to know which view has received this event
一个

android.widget.TextView

参数，表示接收到事件的视图
A

java.lang.CharSequence

parameter to
get the modified text.
一个

java.lang.CharSequence

参数，获取修改后的文本
An int parameter named start to get the start position of the modified text.
一个名为start的int类型参数，获取修改后文本的起始位置
An int parameter named before to know the text length before modification.
一个名为before的int类型参数，表示修改前的文本长度
An int parameter named count to know the number of modified characters.
一个名为count的int类型参数，表示被修改字符的数量

Some usage examples of

@TextChange

annotation:

@TextChange

注解的一些用例：

@TextChange(R.id.helloTextView)
void onTextChangesOnHelloTextView(CharSequence text, TextView hello, int before, int start, int count) {
// Something Here
}

@TextChange
void helloTextViewTextChanged(TextView hello) {
// Something Here
}

@TextChange({R.id.editText, R.id.helloTextView})
void onTextChangesOnSomeTextViews(TextView tv, CharSequence text) {
// Something Here
}

@TextChange(R.id.helloTextView)
void onTextChangesOnHelloTextView() {
// Something Here
}

@BeforeTextChange

This annotation is intended to be used on methods to receive events defined by

android.text.TextWatcher.beforeTextChanged(CharSequence
s, int start, int count, int after)

before the text is changed on the targeted TextView or subclass of TextView. The annotation value should be one or several

R.id.*

fields
that refers to TextView or subclasses of TextView. If not set, the method name will be used as the

R.id.*

field
name. The method may have multiple parameters:这个注释表明，当TextView或者其子类的文本值改变之前，加了注解的方法就可以接收由

android.text.TextWatcher.beforeTextChanged(CharSequence
s, int start, int count, int after)

定义的改变事件。注解值应该是一个或多个引用了TextView或者其子类的

R.id.*

字段。如果没有设置，那么会用方法名作为

R.id.*

。该方法可以有多个参数：

A

android.widget.TextView

parameter
to know which view has targeted this event
一个

android.widget.TextView

参数，表示接收到事件的视图
An

java.lang.CharSequence

parameter
to get the text before modification.
一个

java.lang.CharSequence

参数，获取修改前的文本
An int parameter named start to get the start position of the modified text.
一个名为start的int类型参数，获取修改后文本的起始位置
An int parameter named count to know the number of modified characters.
一个名为count的int类型参数，表示被修改字符的数量
An int parameter named after to know the text length after the text modification.
一个名为before的int类型参数，表示修改后的文本长度

Some usage examples of

@BeforeTextChange

annotation:

@BeforeTextChange

注解的一些用例：

@BeforeTextChange(R.id.helloTextView)
void beforeTextChangedOnHelloTextView(TextView hello, CharSequence text, int start, int count, int after) {
// Something Here
}

@BeforeTextChange
void helloTextViewBeforeTextChanged(TextView hello) {
// Something Here
}

@BeforeTextChange({R.id.editText, R.id.helloTextView})
void beforeTextChangedOnSomeTextViews(TextView tv, CharSequence text) {
// Something Here
}

@BeforeTextChange(R.id.helloTextView)
void beforeTextChangedOnHelloTextView() {
// Something Here
}

@AfterTextChange

This annotation is intended to be used on methods to receive events defined by

android.text.TextWatcher.afterTextChanged(Editable
s)

after the text is changed on the targeted TextView or subclass of TextView. The annotation value should be one or several

R.id.*

fields
that refers to TextView or subclasses of TextView. If not set, the method name will be used as the

R.id.*

field
name. The method may have multiple parameter:

这个注释表明，当TextView或者其子类的文本值改变后，加了注解的方法就可以接收由

android.text.TextWatcher.afterTextChanged(Editable
s)

定义的改变事件。注解值应该是一个或多个引用了TextView或者其子类的

R.id.*

字段。如果没有设置，那么会用方法名作为

R.id.*

。该方法可以有多个参数：

A

android.widget.TextView

parameter to know
which view has targeted this event

一个

android.widget.TextView

参数，表示接收到事件的视图

An android.text.Editable

to make changes
on modified text.
一个

android.text.Editable

参数，表示对已经修改的文本进行确认

Some usage examples of

@AfterTextChange

annotation
:

@AfterTextChange(R.id.helloTextView)
void afterTextChangedOnHelloTextView(Editable text, TextView hello) {
// Something Here
}

@AfterTextChange
void helloTextViewAfterTextChanged(TextView hello) {
// Something Here
}

@AfterTextChange({R.id.editText, R.id.helloTextView})
void afterTextChangedOnSomeTextViews(TextView tv, Editable text) {
// Something Here
}

@AfterTextChange(R.id.helloTextView)
void afterTextChangedOnHelloTextView() {
// Something Here
}