ViewBinding - How to set visibility for include layout in ViewBinding?

Question

I use an include layout and I need to change it's visibility:

 <include
    android:id="@+id/layout_provinces"
    layout="@layout/layout_select_provinces"
     />

and layout_select_provinces is sth like this:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/select_province"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:background="@color/white"
 android:visibility="gone">

    <LinearLayout
        android:id="@+id/layout_top"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/background_color"
        android:orientation="vertical">

        <TextView
            android:id="@+id/txt_state"
            style="@style/FontIranBold"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:layout_marginTop="@dimen/_8sdp"
            android:layout_marginRight="@dimen/_4sdp"
            android:layout_marginBottom="@dimen/_8sdp"
            android:text="@string/txt_select_province"
            android:textSize="@dimen/font_size_small" />

        <View
            android:layout_width="match_parent"
            android:layout_height="@dimen/_1sdp"
            android:background="@color/gray_special" />

    </LinearLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recycler_estate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout_top"
        android:layout_marginTop="@dimen/_8sdp" />

but when I set Id to RelativeLayout, my app crashes and I can't change the visibility:

     binding.layoutProvinces.selectProvince.setVisibility(View.GONE);

is there anyone can help me with ViewBinding set id process?

Answer 1

When we give <include> an id it overrides the id of root layout that we included. In your case, layout_provinces is overriding <RelativeLayout's select_province. So when you access the relative layout it gives you an error because it is no longer there.

What you can do is remove the id of relative layout and only give id to include and access the root layout that you included through the getRoot() method like below.

Java

binding.selectProvince.getRoot().setVisibility(View.GONE)

Kotlin

binding.selectProvince.root.visibility = View.GONE

the getRoot() method in View Binding returns the topmost view of the given layout in your case it's the RelativeLayout.