Android program to perform four basic Arithmetic Operations(addition, subtraction, multiplication and division)

 Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout 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:background="@color/color1"
        android:orientation="vertical"
        tools:context=".MainActivity">

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="100dp"
            android:layout_marginTop="30dp"
            android:gravity="center_horizontal"
            android:text="ARITHMETIC OPERATIONS"
            android:textColor="@color/color2"
            android:textAppearance="@style/TextAppearance.AppCompat.Display1"></TextView>
        <TableLayout
            android:id="@+id/tableLayout1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:stretchColumns="1">
            <TableRow
                android:id="@+id/tableRow1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/fno_tv"
                    android:layout_width="match_parent"
                    android:layout_height="40dp"
                    android:text="ENTER FIRST NUMBER   "
                    android:textAppearance="@style/TextAppearance.AppCompat.Large"
                    android:textColor="@color/color2" />

                <EditText
                    android:id="@+id/fno_et"
                    android:layout_width="match_parent"
                    android:layout_height="45dp"
                    android:ems="10"
                    android:inputType="number"
                    android:textAppearance="@style/TextAppearance.AppCompat.Large"
                    android:textColor="@color/color3" />
            </TableRow>
            <TableRow
                android:id="@+id/tableRow2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/sno_tv"
                    android:layout_width="match_parent"
                    android:layout_height="75dp"
                    android:text="ENTER SECOND NUMBER   "
                    android:textAppearance="@style/TextAppearance.AppCompat.Large"
                    android:textColor="@color/color2" />

                <EditText
                    android:id="@+id/sno_et"
                    android:layout_width="match_parent"
                    android:layout_height="45dp"
                    android:ems="10"
                    android:inputType="number"
                    android:textAppearance="@style/TextAppearance.AppCompat.Large"
                    android:textColor="@color/color3" />
            </TableRow>

            <Button
                android:id="@+id/buttonsum"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/colorAccent"
                android:gravity="center"
                android:text="ADD"
                android:textAppearance="@style/TextAppearance.AppCompat.Large" />

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="10dp" />
            </TableRow>

            <Button
                android:id="@+id/buttonsub"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/colorAccent"
                android:gravity="center"
                android:text="SUBTRACT"
                android:textAppearance="@style/TextAppearance.AppCompat.Large" />

            <TableRow

                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <TextView

                    android:layout_width="match_parent"
                    android:layout_height="10dp"
                    />
            </TableRow>

            <Button
                android:id="@+id/buttonmul"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/colorAccent"
                android:gravity="center"
                android:text="MULTIPLY"
                android:textAppearance="@style/TextAppearance.AppCompat.Large" />

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="10dp" />
            </TableRow>

            <Button
                android:id="@+id/buttondiv"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/colorAccent"
                android:gravity="center"
                android:text="DIVIDE"
                android:textAppearance="@style/TextAppearance.AppCompat.Large" />

            <TableRow
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="75dp" />
            </TableRow>

            <TableRow
                android:id="@+id/tableRow3"
                android:layout_width="match_parent"
                android:layout_height="40dp">

                <TextView
                    android:id="@+id/result_tv"
                    android:layout_width="wrap_content"
                    android:layout_height="50dp"
                    android:text="RESULT"
                    android:textAppearance="@style/TextAppearance.AppCompat.Display1"
                    android:textColor="@color/color2" />

                <TextView
                    android:id="@+id/result_value"
                    android:layout_width="match_parent"
                    android:layout_height="50dp"
                    android:textAppearance="@style/TextAppearance.AppCompat.Display1"
                    android:textColor="@color/color3" />
            </TableRow>
        </TableLayout>
    </LinearLayout>

MainAcitivity.java

package com.example.arithmeticoperations;



import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;



public class MainActivity extends Activity {



    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        final Button btnsum = (Button) findViewById(R.id.buttonsum);

        final Button btnsub = (Button) findViewById(R.id.buttonsub);

        final Button btndiv = (Button) findViewById(R.id.buttondiv);

        final Button btnmul = (Button) findViewById(R.id.buttonmul);

        final EditText etv = (EditText) findViewById(R.id.fno_et);

        final EditText etv2 = (EditText) findViewById(R.id.sno_et);

        final TextView result = (TextView) findViewById(R.id.result_value);



        btnsum.setOnClickListener(new OnClickListener() {



            @Override

            public void onClick(View v) {

                 btnsum.setBackgroundColor(Color.GRAY);

                double x = new Double(etv.getText().toString());

                double y = new Double(etv2.getText().toString());

                double sum = x + y;

                result.setText(Double.toString(sum));

            }

        });



        btnsub.setOnClickListener(new OnClickListener() {



            @Override

            public void onClick(View v) {

                 btnsub.setBackgroundColor(Color.GRAY);

                 double x = new Double(etv.getText().toString());

                 double y = new Double(etv2.getText().toString());

                 double sub = x - y;

                 result.setText(Double.toString(sub));

            }

        });



        btndiv.setOnClickListener(new OnClickListener() {



            @Override

            public void onClick(View v) {

                 btndiv.setBackgroundColor(Color.GRAY);

                double x = new Double(etv.getText().toString());

                double y = new Double(etv2.getText().toString());

                double div = x / y;

                result.setText(Double.toString(div));

            }

        });



        btnmul.setOnClickListener(new OnClickListener() {



            @Override

            public void onClick(View v) {

                 btnmul.setBackgroundColor(Color.GRAY);

                double x = new Double(etv.getText().toString());

                double y = new Double(etv2.getText().toString());

                double mul = x * y; 

                result.setText(Double.toString(mul));

            }

        });

    }



}

 

 

colors.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <color name="colorPrimary">#6200EE</color>

    <color name="colorPrimaryDark">#3700B3</color>

    <color name="colorAccent">#03DAC5</color>

    <color name="color1">#FFE4E1</color>

    <color name="color2">#191970</color>

    <color name="color3">#FF0000</color>

</resources>

 

String.xml

<resources>

    <string name="app_name">ArithmeticOperations</string>

</resources>