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[英]Android - How to pass object of a view from XML with data binding
[英]Android XML Data Binding pass view by id
為了顯示 BottomSheetBehavior,我需要像下面這樣傳遞他的視圖。
ViewUtil.kt class
fun showBottomSheet(view: View) {
val bottomSheetBehavior = BottomSheetBehavior.from(view)
if (bottomSheetBehavior.state == BottomSheetBehavior.STATE_COLLAPSED) {
bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED
} else {
bottomSheetBehavior.state = BottomSheetBehavior.STATE_COLLAPSED
}
}
片段.kt
termsTitle.setOnClickListener {
showBottomSheet(tosLayoutBottomSheet)
}
bottom_sheet_tos.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"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/tosLayoutBottomSheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_hideable="true"
app:behavior_peekHeight="0dp"
app:layout_behavior="@string/bottom_sheet_behavior">
<!-- some stuff about terms of service -->
</androidx.constraintlayout.widget.ConstraintLayout>
片段.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:ignore="MissingDefaultResource">
<data>
<import
alias="v"
type="android.view.View" />
<variable
name="fragmentViewModel"
type=".FragmentViewModel"/>
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/main_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background_main_page">
<TextView
android:id="@+id/terms_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="24dp"
android:layout_marginBottom="8dp"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:text="@string/terms_of_service"
android:textColor="@color/colorGrey"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
因此,改為使用片段中的 onclicklistener 我想從我的 xml 和 viewmodel 中做到這一點:
片段.xml
<TextView
android:id="@+id/terms_title"
android:onClick="@{(v)-> fragmentViewModel.showBottomSheetFrag(tosLayoutBottomSheet)}"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginStart="24dp"
android:layout_marginBottom="8dp"
android:paddingLeft="30dp"
android:paddingRight="30dp"
android:text="@string/terms_of_service"
android:textColor="@color/colorGrey"
android:textSize="20sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent" />
我知道上述方法不起作用,因為 tosLayoutBottomSheet id 在另一個布局中。 如何從不同的布局傳遞 id?
A bit late but you can add an import of R class in your xml file and then pass the view id with R.id.view_id
<import type="com.xxx.xxxx.R" />
然后在你 onclick
android:onClick="@{(v)->view.yourMethod(R.id.view_id)}"
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