fragment_webview.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="match_parent"
    android:layout_height="match_parent">

    <!--    <ImageView-->
    <!--        android:visibility="gone"-->
    <!--        android:layout_width="wrap_content"-->
    <!--        android:layout_height="wrap_content"-->
    <!--        app:srcCompat="@mipmap/nav_bg"-->
    <!--        tools:ignore="MissingConstraints" />-->

    <!--    <include-->
    <!--        android:visibility="gone"-->
    <!--        android:id="@+id/webview_nav_layout"-->
    <!--        layout="@layout/layout_nav" />-->

    <LinearLayout
        android:id="@+id/webview_layout"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"></LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>