<?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:textAlignment="center"
tools:context=".MainActivity">
<TextView
android:id="@+id/ResultText"
android:layout_width="318dp"
android:layout_height="134dp"
android:layout_marginStart="60dp"
android:layout_marginEnd="60dp"
android:layout_marginBottom="50dp"
android:text="Result:"
android:textAlignment="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/linearLayout" />
<EditText
android:id="@+id/number1Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="29dp"
android:layout_marginBottom="24dp"
android:ems="10"
android:hint="Enter Number"
android:inputType="number"
app:layout_constraintBottom_toTopOf="@+id/number2Text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/number2Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="40dp"
android:ems="10"
android:hint="Enter Number 2"
android:inputType="number"
app:layout_constraintBottom_toTopOf="@+id/linearLayout"
app:layout_constraintStart_toStartOf="@+id/number1Text"
app:layout_constraintTop_toBottomOf="@+id/number1Text" />
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="6dp"
android:layout_marginEnd="6dp"
android:layout_marginBottom="156dp"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@+id/ResultText"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/number2Text">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="sum"
android:text="+" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="deduct"
android:text="-" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="multiply"
android:text="*" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="divide"
android:text="/" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>