本文介绍了为什么此BindingAdapter在Kotlin中不起作用?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个ViewModel:
I have a ViewModel with:
val imageUrl = ObservableField<String>()
我的布局XML具有:
<ImageView
...
app:url="@{viewModel.imageUrl}"
.../>
我有一个具有顶级功能的BindingAdapters文件:
I have a BindingAdapters file with a top level function:
@BindingAdapter("url")
fun loadImage(view: ImageView, url: String?) {
...
}
我遇到以下错误:
data binding error msg:Cannot find the setter for attribute 'app:url' with parameter type android.databinding.ObservableField<java.lang.String> on android.widget.ImageView.
有人知道为什么会这样吗?这与我在Java中设置绑定适配器的方式几乎相同,只不过是静态函数.
Any idea why this would be? This is pretty much identical to how I set up binding adapters in Java, minus the static function.
推荐答案
此问题是由应用程序的build.gradle中缺少kapt引起的.将以下内容添加到build.gradle中,并将所有"annotationProcessor"依赖项替换为"kapt"即可解决此问题.
This issue was caused by a lack of kapt in the app's build.gradle. Adding the below to build.gradle and replacing all "annotationProcessor" dependencies with "kapt" fixes the issue.
apply plugin: 'kotlin-kapt'
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