book_and/app/src/main/res/layout/layout_textviewer.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="@dimen/main_top_height"
    android:paddingBottom="@dimen/main_top_height"
    android:layout_margin="0dp"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/center_guide"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.5"
        android:layout_width="0dp"
        android:layout_height="0dp"/>

    <com.mime.dualscreenview.view.PagedTextView
        android:padding="@dimen/textview_padding"
        android:id="@+id/hidden_view"
        android:visibility="invisible"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/sencond_view"
        android:layout_width="0dp"
        style="@style/sss"
        android:layout_height="match_parent"/>

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/first_view"
        android:padding="@dimen/textview_padding"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toLeftOf="@id/sencond_view"
        android:layout_width="0dp"
        style="@style/sss"
        android:layout_height="match_parent"/>

    <androidx.appcompat.widget.AppCompatTextView
        android:padding="@dimen/textview_padding"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:visibility="visible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="@id/center_guide"
        android:id="@+id/sencond_view"
        android:layout_width="0dp"
        style="@style/sss"
        android:layout_height="match_parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>