Android studio 花式按键

一、activity_main.xml代码：

<?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"
    android:backgroundTint="#D8A91B"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/but1"
        android:layout_width="211dp"
        android:layout_height="60dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="32dp"
        android:layout_marginEnd="16dp"
        android:backgroundTint="#DAC82A"
        android:text="Button"