DialogX/app/src/main/res/layout/layout_full_webview.xml

<?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"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">

        <Space
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/btn_close"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:paddingLeft="15dp"
            android:paddingRight="15dp"
            android:text="关闭"
            android:textColor="@color/dialogxIOSBlue"
            android:textSize="18dp" />

    </LinearLayout>

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