testcamerav1/android/app/src/main/res/layout/codigo_barras2.xml

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="Ler código de barras"
            android:textAppearance="@style/TextAppearance.AppCompat.Body1"
            android:textSize="36sp"
            android:textStyle="bold" />

    </LinearLayout>


    <Button
        android:id="@+id/btnLigarFlash"
        style="@style/Widget.AppCompat.Button.Colored"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Flash - Desligado"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"/>

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:layout_marginTop="8dp" />

    <EditText
        android:id="@+id/textLeitura"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:editable="false"
        android:ems="10"
        android:enabled="false"
        android:gravity="start|top"
        android:inputType="textMultiLine" />

</LinearLayout>