How to add two numbers in Android Studio? | Source Code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

  <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="50dp"
      android:textSize="20dp"
      android:text="Enter the First Number:"
      />
  <EditText
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="25dp"
      android:ems="10"
      android:id="@+id/txtFirstNo"
    />
  <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="50dp"
      android:textSize="20dp"
      android:text="Enter the Second Number:"
      />
  <EditText
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="25dp"
      android:ems="10"
      android:id="@+id/txtSecondNo"
      />
  <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/btnAdd"
      android:text="Add"
      android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="25dp"
      android:onClick="Calculate"
      />
  <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
    android:id="@+id/txtResult"
    android:layout_gravity="center_horizontal"
      android:gravity="center_horizontal"
      android:layout_marginTop="50dp"
      android:textSize="20dp"
      />
  </LinearLayout>

package com.infinetsoft.addition;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private EditText txtFirstNo;
    private EditText txtSecondNo;
    private TextView txtResult;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txtFirstNo=(EditText) findViewById(R.id.txtFirstNo);
        txtSecondNo=(EditText) findViewById(R.id.txtSecondNo);
        txtResult=(TextView) findViewById(R.id.txtResult);
    }

    public void Calculate(View v){

        Float first= Float.parseFloat( txtFirstNo.getText().toString()) ;
        Float second= Float.parseFloat( txtSecondNo.getText().toString()) ;
        Float result=first+second;
        txtResult.setText(result.toString());

    }

}