activity_main2.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"
    android:background="#03A9F4"
    android:backgroundTint="#CEE7F3"
    tools:context=".MainActivity2">

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/button"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:background="#D3D3D3"
        android:backgroundTint="#2196F3"
        android:fontFamily="casual"
        android:hapticFeedbackEnabled="false"
        android:onClick="OnButtonClicked1"
        android:text="식단 관리\n추천"
        android:textColor="@color/white"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/button2"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/button2"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_marginEnd="44dp"
        android:background="#2196F3"
        android:backgroundTint="#2196F3"
        android:fontFamily="casual"
        android:onClick="OnButtonClicked2"
        android:text="칼로리\n계산"
        android:textColor="@color/white"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="HOME"
        android:textColor="#F6EFEF"
        android:textSize="34sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        tools:layout_editor_absoluteY="56dp" />

</androidx.constraintlayout.widget.ConstraintLayout>