Android 查看菜单文件的绑定?
可以在菜单资源中使用Android 查看菜单文件的绑定?,android,android-databinding,android-menu,android-viewbinding,Android,Android Databinding,Android Menu,Android Viewbinding,可以在菜单资源中使用视图绑定(或数据绑定)吗 override fun onCreateOptionsMenu(menu: Menu): Boolean { menuInflater.inflate(R.menu.menu_main, menu) // search using ID - can this be replaced by view binding? val searchView = menu.findItem(R.id.menu_search).a
视图绑定
(或数据绑定
)吗
override fun onCreateOptionsMenu(menu: Menu): Boolean {
menuInflater.inflate(R.menu.menu_main, menu)
// search using ID - can this be replaced by view binding?
val searchView = menu.findItem(R.id.menu_search).actionView as SearchView
}
在大多数情况下,视图绑定将替换findviewbyd
根据报告:
视图绑定是一种允许您更轻松地编写代码的功能
它与视图交互。在模块中启用视图绑定后,
它为该模块中存在的每个XML布局文件生成一个绑定类
在菜单中,它使用的是
findItem()
而不是findViewById()
方法。目前,数据绑定只用于布局资源,而不是菜单资源。特定于带有自定义xml视图的菜单项,不是:
partial\u menu\u sample\u view.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="?actionBarSize"
android:layout_height="?actionBarSize"
android:clipToPadding="false"
android:focusable="true">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:contentDescription="@null"
android:src="@drawable/ic_sample"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/textview_sample"
android:visibility="gone"
app:layout_constraintBottom_toTopOf="@id/guideline_horizontal_center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="@id/guideline_vertical_center"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbar_sample"/>
</LinearLayout>
SampleActivity.kt
class SampleActivity() {
lateinit var binding: ActivitySampleBinding
var menuSampleViewBinding: PartialMenuSampleViewBinding? = null
...
override fun onCreate() {
super.onCreate()
binding = ActivitySampleBinding.inflate(layoutInflater)
setContentView(binding.root)
}
...
override fun onCreateOptionsMenu() {
// inflate the menu to show on your toolbar
// replace with your own menu xml
binding.toolbarProduct.inflateMenu(R.menu.activity_sample)
with(binding.toolbarProduct.menu) {
findItem(R.id.menu_item_cart)?.actionView?.let {
menuSampleViewBinding = PartialMenuSampleViewBinding.bind(it)
}
// handle other menu items here
}
}
...
fun customFunction() {
// use as needed
menuSampleViewBinding?.textviewSample?.text = "1"
menuSampleViewBinding?.root?.setOnClickListeners { /* add what you need */ }
}
}
在菜单项上有徽章计数的用例中使用此选项。很好