Create an application that will pass two number using TextView to the next screen , and on the next screen display sum of that number.

Create an application that will pass two number using TextView (must be EditText) to the next screen , and on the next screen display sum of that number.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <EditText
        android:hint="Enter first number"
        android:layout_marginTop="50dp"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/etFirst"
        android:ems="10"
        android:inputType="number"/>
    <EditText
        android:hint="Enter second number"
        android:layout_below="@+id/etFirst"
        android:layout_centerHorizontal="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/etSecond"
        android:ems="10"
        android:inputType="number"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btnSum"
        android:text="SUM"
        android:layout_below="@+id/etSecond"
        android:layout_centerHorizontal="true"/>

</RelativeLayout>

MainActivity.java

package com.example.helloworld;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final EditText etFirst=(EditText)findViewById(R.id.etFirst);
        final EditText etSecond=(EditText)findViewById(R.id.etSecond);
        Button btnFirst=(Button)findViewById(R.id.btnSum);

        btnFirst.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i=new Intent(getApplicationContext(),MainActivity2.class);
                i.putExtra("no1",etFirst.getText().toString());
                i.putExtra("no2",etSecond.getText().toString());
                startActivity(i);
            }
        });
    }
}

activity_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:id="@+id/tvDisp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"/>

</RelativeLayout>

MainActivity2.java

package com.example.helloworld;

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

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        TextView tvDisp=(TextView)findViewById(R.id.tvDisp);

        tvDisp.setText(
                Integer.parseInt(getIntent().getStringExtra("no1")) +
                        Integer.parseInt(getIntent().getStringExtra("no2"))+" is answer."
        );
    }
}

Output

After entering numbers and clicking on SUM button, a new activity will open with the addition of two numbers like following