WordPress/src/main/res/layout/edit_post_preview_fragment.xml

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/white">

    <FrameLayout
        android:layout_width="fill_parent"
        android:layout_height="match_parent">

        <WebView
            android:id="@+id/post_preview_webview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" />

        <TextView
            android:id="@+id/post_preview_textview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="#FFFFFF"
            android:padding="@dimen/margin_extra_large"
            android:textSize="@dimen/text_sz_large" />
    </FrameLayout>

</ScrollView>