kmpdfkit_demo/ComPDFKit_Tools/src/main/res/layout/tools_ctool_bar.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:layout_height="?android:attr/actionBarSize">


    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/tv_tool_bar_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginEnd="24dp"
        android:fontFamily="sans-serif-medium"
        android:textColor="?android:attr/textColorPrimary"
        android:textSize="22sp"
        app:layout_constrainedWidth="true"
        tools:text="ComPDFKit"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0"
        app:layout_constraintStart_toEndOf="@id/iv_tool_bar_back"
        app:layout_constraintTop_toTopOf="parent"
        />

    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/iv_tool_bar_back"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_marginStart="8dp"
        android:padding="6dp"
        android:background="@drawable/tools_common_oval_ripple"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/tools_ic_back"
        app:tint="?attr/colorOnPrimary" />


</androidx.constraintlayout.widget.ConstraintLayout>