---
title: "How to enter two number in one activity and perform Add and Subtract operation on another activity in an android studio?"  
description: "How to enter two number in one activity and perform Add and Subtract operation on another activity in an android studio?"  
author: "Gurmeet Kaur"  
published: 2018-11-20  
updated: 2018-11-20  
canonical: https://answers.mindstick.com/qa/51737/how-to-enter-two-number-in-one-activity-and-perform-add-and-subtract-operation-on-another-activity-in-an-android-studio  
category: "programming"  
tags: ["android-studio", "activity", "plus-minus-operation"]  
reading_time: 6 minutes  

---

# How to enter two number in one activity and perform Add and Subtract operation on another activity in an android studio?

How to enter two number in one [activity](https://www.mindstick.com/blog/23160/fidgetsguide-exercise-guides-newsletters) and perform [Add](https://yourviews.mindstick.com/story/4883/5-signs-you-need-to-add-more-protein-to-your-diet) and Subtract [operation](https://yourviews.mindstick.com/view/83916/why-is-it-necessary-to-sterilize-operation-theater) on another activity in an [android studio](https://www.mindstick.com/blog/10942/android-studio-vs-eclipse)?

## Answers

### Answer by Arti Mishra

**"Perform Add-Subtract Operation on another Activity in [Android](https://www.mindstick.com/articles/1672/android-internals) Studio"**

If you want to perform the add-subtract operation in two different activity, then, first of all, you need to follow these steps- \

**Step 1:** Open your android studio project and **create activity file for input two number and also add one button for redirect input number into another activity**. In my code, I’m create **activity_main.xml** for input two numbers. Let see, what code will be needed for creating your layout file.

\

## activity_main.xml

```
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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_gravity="center"    android:gravity="center"    android:layout_height="match_parent"    tools:context="com.example.msclient009.addsubstractexample.MainActivity">

  // using linear layout for add control in vertical format    <LinearLayout        android:layout_width="wrap_content"        android:orientation="vertical"        android:gravity="center"        android:layout_height="wrap_content">
    <EditText        android:id="@+id/first_number"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginBottom="30dp"        android:hint="Enter First No......." />
    <EditText        android:id="@+id/second_number"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginBottom="30dp"        android:hint="Enter Second No......."        />
    <Button        android:id="@+id/ok"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="OK"        tools:layout_editor_absoluteX="157dp"        tools:layout_editor_absoluteY="289dp"        tools:ignore="MissingConstraints" />

    </LinearLayout></RelativeLayout> 
```

\

**Step 2:** Now we will create **MainActivity.java** file for **fetching input numbers.** And for the redirect to another activity, we use **Intent class.**

**Step 3:** For **sending parameter,** one activity to another activity we use **putExtra(key, value) method.**

## \

## MainActivity.java

```
package com.example.msclient009.addsubstractexample;

import android.content.Intent; import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;

public class MainActivity extends AppCompatActivity {    EditText firstNumber,secondNumber;    Button ok;    @Override
    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);

        firstNumber=(EditText)findViewById(R.id.first_number);        secondNumber=(EditText)findViewById(R.id.second_number);
        ok=(Button)findViewById(R.id.ok);
   // apply click listeren        ok.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Intent intent = new Intent(getApplicationContext(), AddSubtractOperation.class);                intent.putExtra("FirstNumber",firstNumber.getText().toString());   // Code for sending data                intent.putExtra("SecondNumber",secondNumber.getText().toString());                startActivity(intent);   // Code for startActivity (AddSubtractOperation)
            }        });

    }}
```

\

**Step 4:** For performing the **add-subtract operation** you will need to **create another layout file. In** my code, we will create **activity_add_subtract_operation.xml**

**Step 5:** In this layout file we will **add one textView for display result and two buttons(+ & -) for performing operations.** Let see, what code will write-

\

## activity_add_subtract_operation.xml

```
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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="com.example.msclient009.addsubstractexample.AddSubtractOperation">

        <android.support.v7.widget.Toolbar            android:id="@+id/toolbar"            android:layout_width="match_parent"            android:layout_height="?attr/actionBarSize"            android:background="?attr/colorPrimary">

            <ImageView                android:id="@+id/back_arrow"                android:layout_width="wrap_content"                android:layout_marginTop="-40dp"                android:paddingRight="15dp"                android:paddingLeft="15dp"                android:src="@drawable/back_arrow"                android:layout_height="wrap_content" />

            <TextView                android:layout_width="wrap_content"                android:text=" Click for Back"                android:textColor="#fff"                android:textSize="22dp"                android:layout_height="wrap_content" />        </android.support.v7.widget.Toolbar>
<RelativeLayout 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:layout_gravity="center"    android:gravity="center"    tools:context="com.example.msclient009.addsubstractexample.AddSubtractOperation">

    <LinearLayout        android:layout_width="wrap_content"        android:orientation="vertical"        android:gravity="center"        android:layout_height="wrap_content">
    <TextView        android:id="@+id/result"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Click Plus &amp; Minus for display Result"        android:textSize="16dp"        tools:ignore="MissingConstraints"        android:layout_marginBottom="120dp" />
        <LinearLayout            android:layout_width="wrap_content"            android:layout_height="wrap_content">
    <Button        android:id="@+id/plus"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="+"        android:textSize="24dp"        tools:ignore="MissingConstraints" />
    <Button        android:id="@+id/minus"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="-"        android:textSize="24dp" />        </LinearLayout>    </LinearLayout>
</RelativeLayout>
</android.support.design.widget.CoordinatorLayout>
```

\

**Step 6:** Create another java file for **performing an operation** and we will also use the back button for go to previous activity.

**Step 7:** For getting parameter to previous activity we use **getIntent().getStringExtra("key") method.**

## \

## AddSubtractOperation.java

```
package com.example.msclient009.addsubstractexample;import android.content.Intent;import android.support.v4.app.Fragment;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;

public class AddSubtractOperation extends AppCompatActivity {    ImageView backArrow;    Button btnPlus,btnMinus;    TextView resultTextView;    int firstNumber,secondNumber,result;

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_add_subtract_operation);
        backArrow=(ImageView)findViewById(R.id.back_arrow);        btnPlus=(Button)findViewById(R.id.plus);        btnMinus=(Button)findViewById(R.id.minus);        resultTextView=(TextView)findViewById(R.id.result);
        // Code for getting parameter from previous activity        firstNumber = Integer.valueOf(getIntent().getStringExtra("FirstNumber"));        secondNumber=Integer.valueOf(getIntent().getStringExtra("SecondNumber"));

        // Code for go back previous activity        backArrow.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Intent intent = new Intent(getApplicationContext(), MainActivity.class);                 startActivity(intent);            }        });

        btnPlus.setOnClickListener(new View.OnClickListener() {           @Override            public void onClick(View view) {                result=firstNumber+secondNumber;                resultTextView.setText(String.valueOf(result));            }        });

               btnMinus.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                result=firstNumber-secondNumber;                resultTextView.setText(String.valueOf(result));            }        });    }}
```

\

## Finally what will be the output of above codes :

## \

![How to enter two number in one activity and perform Add and Subtract operation on another activity in an android studio?](https://answers.mindstick.com/questionanswer/44eae7b5-56f1-4c47-9743-8b3902340e49/images/bfaa1f8a-f8f7-4000-83f6-b1758928ca53.png)![How to enter two number in one activity and perform Add and Subtract operation on another activity in an android studio?](https://answers.mindstick.com/questionanswer/44eae7b5-56f1-4c47-9743-8b3902340e49/images/b378e5c7-ac7b-4d06-b5b6-2b52db10c0dc.png) **\**

## \

## \

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## "Thanks!!! for Reading"


---

Original Source: https://answers.mindstick.com/qa/51737/how-to-enter-two-number-in-one-activity-and-perform-add-and-subtract-operation-on-another-activity-in-an-android-studio

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