activity_tela_principal.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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/background"
    tools:context=".TelaPrincipal">

    <!-- Título -->
    <TextView
        android:id="@+id/textTitulo"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:fontFamily="@font/playfairdisplay_extrabold"
        android:text="Cardápio Rápido"
        android:textColor="@color/gray_dark"
        android:textSize="40sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <!-- RecyclerView -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerViewItens"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="20dp"
        android:background="@drawable/tabela_background"
        app:layout_constraintWidth_percent="0.9"
        app:layout_constraintHeight_percent="0.6"
        app:layout_constraintTop_toBottomOf="@id/textTitulo"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <!-- Botões -->
    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/buttonGerar"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="8dp"
        android:background="@drawable/button_principal"
        android:fontFamily="@font/oleoscriptswashcaps_regular"
        android:text="Gerar QR"
        android:textAllCaps="false"
        android:textColor="@color/white"
        app:layout_constraintWidth_percent="0.4"
        app:layout_constraintStart_toStartOf="@id/recyclerViewItens"
        app:layout_constraintTop_toBottomOf="@id/recyclerViewItens" />

    <androidx.appcompat.widget.AppCompatButton
        android:id="@+id/buttonAdicionar"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginStart="8dp"
        android:background="@drawable/button_principal"
        android:fontFamily="@font/oleoscriptswashcaps_regular"
        android:text="Adicionar item"
        android:textAllCaps="false"
        android:textColor="@color/white"
        app:layout_constraintWidth_percent="0.4"
        app:layout_constraintEnd_toEndOf="@id/recyclerViewItens"
        app:layout_constraintTop_toBottomOf="@id/recyclerViewItens" />

    <!-- Rodapé -->
    <View
        android:id="@+id/rodape"
        android:layout_width="0dp"
        android:layout_height="65dp"
        android:background="@color/brown_light"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <!-- Ícone de usuário no rodapé -->
    <ImageView
        android:id="@+id/iconeUsuario"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:background="@drawable/circle"
        android:src="@drawable/user"
        android:scaleType="centerInside"
        app:layout_constraintTop_toTopOf="@id/rodape"
        app:layout_constraintBottom_toBottomOf="@id/rodape"
        app:layout_constraintStart_toStartOf="@id/rodape"
        app:layout_constraintEnd_toEndOf="@id/rodape" />

</androidx.constraintlayout.widget.ConstraintLayout>