Android Studio: Adding two numbers (Java Code)

ANDROID APP FOR ADDING TWO NUMBERS (JAVA CODE)

In this blog we are going to learn about the Android App, for adding two number.

"AndroidManifest.xml"

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

"MainActivity.java"

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText editText,editText2;

    private Button buttonSum;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        addListenerOnButton();

    }

    private void addListenerOnButton() {

        editText = (EditText)findViewById(R.id.editText);

        editText2 = (EditText)findViewById(R.id.editText2);

        buttonSum = (Button)findViewById(R.id.button);

        buttonSum.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                String value1 = editText.getText().toString();

                String value2 = editText2.getText().toString();

                int a = Integer.parseInt(value1);

                int b = Integer.parseInt(value2);

                int sum = a+b;

                Toast.makeText(getApplicationContext(),String.valueOf(sum),Toast.LENGTH_LONG).show();

            }

        });

    }

}

"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_height="match_parent"

    tools:context=".MainActivity">

    <EditText

        android:id="@+id/editText"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="61dp"

        android:ems="10"

        android:inputType="number"

        tools:layout_editor_absoluteX="79dp"

        tools:layout_editor_absoluteY="160dp" />

    <EditText

        android:id="@+id/editText2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/editText"

        android:layout_centerHorizontal="true"

        android:ems="10"

        android:inputType="number"

        

        tools:layout_editor_absoluteX="79dp"

        tools:layout_editor_absoluteY="292dp" />

    <Button

        android:id="@+id/button"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/editText2"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="109dp"

        android:text="Add"

        tools:layout_editor_absoluteX="148dp"

        tools:layout_editor_absoluteY="266dp"/>

</RelativeLayout>

"ScreenShots"