Kotlin合成扩展名，其中一些包含相同的布局 [英] Kotlin synthetic extension and several include same layout

问题描述

如果我的布局如下，如何使用kotlin合成扩展名进行查看:

How to access to view using kotlin synthetic extension if I have a layout like below:

file:two_days_view.xml

file:two_days_view.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <include
        android:id="@+id/day1"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <include
        android:id="@+id/day2"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

文件:day_row.xml

file: day_row.xml

   <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"       >

        <TextView
            android:id="@+id/dayName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </LinearLayout>

如何访问dayName?我在找这样的东西:

How to access to dayName? I looked for some like this:

day1.dayName.text = "xxx"
day2.dayName.text = "sss"

我在Studio中看到我可以访问dayName，但是dayName TextView引用了哪一个?

I see in Studio that I have access to dayName but to which one of dayName TextView is reference to?

正常，如果我只有一个包含的布局，则效果很好.但是现在我多次包含相同的布局.

Normal if I have only one included layout it works fine. But now I have multiple times included same layout.

当然我总能做到:

day1.findViewById(R.id.dayName).text = "xxx"

但是我正在寻找不错的解决方案. :)

but I'm looking for nice solution. :)

推荐答案

作为一般的经验法则，您不应构建最终拥有多个具有相同id的视图的布局-正是由于这个原因.

As a general rule of thumb, you should not construct layouts that end up having multiple views with the same id - for this very reason.

但是，要解决您的问题: 而不是导入

But, to solve your problem: Instead of importing

kotlinx.android.synthetic.main.layout.day_row.*

您可以导入

kotlinx.android.synthetic.main.layout.day_row.view.*(请注意末尾的其他.view).

kotlinx.android.synthetic.main.layout.day_row.view.* (Notice the additional .view at the end).

这不会将视图导入为活动/片段"级别的属性，而是作为View的扩展属性.这样，假设day1和day2包含所需的视图，就可以按照所需的方式进行操作:

This will import the views not as properties on the Activity/Fragment level, but instead as extension properties for View. That way, you can do it the way you want, assuming that day1 and day2 contain the views you want:

day1.dayName.text = "xxx"
day2.dayName.text = "sss"

这篇关于Kotlin合成扩展名，其中一些包含相同的布局的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！