TestComm/app/src/main/res/layout/activity_main.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=".MainActivity">

    <Button
        android:id="@+id/btnSpi"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SPI"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
         />

    <EditText
        android:id="@+id/edtPort"
        android:text=""
        app:layout_constraintLeft_toRightOf="@id/btnSpi"
        app:layout_constraintTop_toTopOf="@+id/btnSpi"
        android:layout_marginStart="8dp"
        android:layout_width="100dp"
        android:layout_height="wrap_content">

    </EditText>

    <Button
        android:id="@+id/turnOn12V"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="12V"
        app:layout_constraintLeft_toRightOf="@id/edtPort"
        app:layout_constraintTop_toTopOf="@+id/btnSpi" />

    <Button
        android:id="@+id/turnOn485"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="485"
        app:layout_constraintLeft_toRightOf="@id/turnOn12V"
        app:layout_constraintTop_toTopOf="@+id/btnSpi" />

    <Button
        android:id="@+id/turnOn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开电源"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnSpi" />

    <Button
        android:id="@+id/turnOff"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="关电源"
        app:layout_constraintLeft_toRightOf="@+id/turnOn"
        app:layout_constraintTop_toTopOf="@+id/turnOn" />

    <Button
        android:id="@+id/zoomIn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="拉近"
        app:layout_constraintLeft_toRightOf="@+id/turnOff"
        app:layout_constraintTop_toTopOf="@+id/turnOn" />

    <Button
        android:id="@+id/zoomOut"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="拉远"
        app:layout_constraintLeft_toRightOf="@+id/zoomIn"
        app:layout_constraintTop_toTopOf="@+id/turnOn" />

    <Button
        android:id="@+id/turnLeft"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="左"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/turnOn" />

    <Button
        android:id="@+id/turnRight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="右"
        app:layout_constraintLeft_toRightOf="@+id/turnLeft"
        app:layout_constraintTop_toTopOf="@+id/turnLeft" />

    <Button
        android:id="@+id/turnUp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="上"
        app:layout_constraintLeft_toRightOf="@+id/turnRight"
        app:layout_constraintTop_toTopOf="@+id/turnLeft" />

    <Button
        android:id="@+id/turnDown"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="下"
        app:layout_constraintLeft_toRightOf="@+id/turnUp"
        app:layout_constraintTop_toTopOf="@+id/turnLeft" />


    <Button
        android:id="@+id/turnOnWipers"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="开雨刮"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/turnLeft" />

    <Button
        android:id="@+id/turnOffWipers"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="关雨刮"
        app:layout_constraintLeft_toRightOf="@+id/turnOnWipers"
        app:layout_constraintTop_toTopOf="@+id/turnOnWipers" />

    <Button
        android:id="@+id/turnOnLight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="开补光"
        app:layout_constraintLeft_toRightOf="@+id/turnOffWipers"
        app:layout_constraintTop_toTopOf="@+id/turnOnWipers" />

    <Button
        android:id="@+id/turnOffLight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="关补光"
        app:layout_constraintLeft_toRightOf="@+id/turnOnLight"
        app:layout_constraintTop_toTopOf="@+id/turnOnWipers" />

    <EditText
        android:id="@+id/speed"
        android:text=""
        android:hint="转速"
        android:layout_width="60dp"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/turnOnWipers">
    </EditText>

    <Button
        android:id="@+id/setSpeed"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="2dp"
        android:text="设置转速"
        app:layout_constraintLeft_toRightOf="@+id/speed"
        app:layout_constraintTop_toTopOf="@+id/speed"
        />

    <EditText
        android:id="@+id/preset"
        android:text=""
        android:hint="预置位"
        android:layout_width="72dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        app:layout_constraintLeft_toRightOf="@+id/setSpeed"
        app:layout_constraintTop_toTopOf="@+id/speed">
    </EditText>

    <Button
        android:id="@+id/setPreset"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="2dp"
        android:text="设置预置位"
        app:layout_constraintLeft_toRightOf="@+id/preset"
        app:layout_constraintTop_toTopOf="@+id/setSpeed"
        />

    <Button
        android:id="@+id/gotoPreset"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:text="调用预置位"
        app:layout_constraintLeft_toRightOf="@+id/setPreset"
        app:layout_constraintTop_toTopOf="@+id/setSpeed"
        />

</androidx.constraintlayout.widget.ConstraintLayout>