使用Kotlin Android扩展程序以编程方式放大布局 [英] Programmatically inflated layout with Kotlin Android Extensions
问题描述
我的布局如下:
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
android:orientation="vertical"
android:background="@android:color/white"
android:paddingLeft="20dp"
android:paddingRight="20dp">
<TextView
android:id="@+id/tvErrorTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textColor="@android:color/background_dark"
android:textSize="18sp"
/>
<TextView
android:id="@+id/tvErrorDesc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:textColor="@android:color/darker_gray"
android:textSize="16sp"
/>
<TextView
android:id="@+id/tvAction"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:layout_marginBottom="10dp"
android:layout_gravity="end"
android:padding="5dp"
android:textSize="15sp"
android:textStyle="bold"
android:textAllCaps="true"
android:textColor="@android:color/holo_purple"
/>
</LinearLayout>
当我想在以下活动之外使用 kotlin android扩展时,它不起作用.我最终做了findViewById.
When I want to use kotlin android extensions outside of activity like below, it doesn't work. I ended up doing findViewById.
...
...
import kotlinx.android.synthetic.main.dialog_error.*
...
...
val view = LayoutInflater.from(context).inflate(R.layout.dialog_error, null, false)
val tvErrorTitle = view.findViewById(R.id.tvErrorTitle) as TextView
val tvErrorDesc = view.findViewById(R.id.tvErrorDesc) as TextView
val tvErrorAction = view.findViewById(R.id.tvAction) as TextView
它不会直接从xml中提取视图.
It doesn't pull the views directly from xml. How to use it in programetically inflated layout and avoid findViewById
?
注意:此问题严格属于 Kotlin Android扩展,而不是语言本身.
Note : This question strictly belongs to Kotlin Android Extensions, not the language itself.
修改 我都导入了:
import kotlinx.android.synthetic.main.dialog_error.view.*
import kotlinx.android.synthetic.main.dialog_error.*
但是Android Studio仍尝试从R.id导入,并且无法识别这两次导入.缺少什么吗?
But Android Studio still tries to import from R.id and doesn't recognize those two imports. Is there anything missing?
推荐答案
从向您证明链接:
如果我们想在View上调用综合属性(在适配器类中很有用),我们还应该导入
If we want to call the synthetic properties on View (useful in adapter classes), we should also import
kotlinx.android.synthetic.main.activity_main.view.*.
即,也导入kotlinx.android.synthetic.main.layout.view.*
以加载View
扩展属性.
That is, import kotlinx.android.synthetic.main.layout.view.*
as well to load the View
extension properties.
然后:
val view = LayoutInflater.from(context).inflate(...)
view.tvErrorTitle.text = "test"
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