activity_speech_to_text.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:context=".speechToText">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/speech_to_text"

        android:textColor="@color/colorTextToSpeech"


        android:textSize="40sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.044" />

    <TextView
        android:id="@+id/textOutput"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="104dp"
        android:layout_marginEnd="8dp"
        android:textIsSelectable="true"
        android:text=""

        android:textColor="@color/colorSpeechToText"

        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.333"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.247" />

    <Button
        android:id="@+id/startDictation"
        android:layout_width="match_parent"
        android:layout_height="58dp"

        android:layout_marginStart="8dp"
        android:layout_marginTop="136dp"
        android:layout_marginEnd="8dp"
        android:onClick="onClick"
        android:text="@string/start"
        android:textColor="#000000"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textOutput" />

</androidx.constraintlayout.widget.ConstraintLayout>