<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical">

    <pl.droidsonroids.gif.GifImageView
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:scaleType="fitXY"
        android:src="@mipmap/topbg" />

    <WebView android:id="@+id/rlWebview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</LinearLayout>