Calculator Android App | Android Studio | Full Project With Source Code | Download .apk File on Phone

In this Post, I have Managed to Build a Calculator Using Android Studio. This is a Basic Calculator Which Performs Several Function.

It is a little bit comlex, so if you are not a Android Developer then You Should Download the .apk File of this App to Use this in your Android Device

About this App :-

This is a Calculator which is designed and developed by me which performs several Calculations like Addition, Substraction, Multiplication, Division, etc. It has Also a About Page Which Contains an Awesome Audiowide Font Look. I builded the app with a dark theme. So if you want Light theme, then simply change the colours.xml File to Make it light theme. This app also has a menu bar. The buttons of this are modern looking awesome designed buttons. So if you like it, then Please Comment Down Below :)

Want to Install It without Android Studio In your Phone, Download from the link :-

Download Calculator.apk File for Android

For Those, who want to Build OwnSelf :-

How to Use :-

First of all Open Android Studio and Create a New Empty Project, After that wait for the Gradle to Complete Building. After that, Open your project's res folder manually and then delete all the folders inside it. Now Download the Import Files from the Button Given Below and then Extract it using WinRar. After Extracting, Cut the Folders that are formed after Extracting and Paste them Inside your res Folder. Now Copy the MainActivity.java Code From Below and Open your MainActivity.java file and Paste the Code there.Now Create One More Java File where your MainActivity.java exists, and name the File as About_Us.java. After that, Copy the About_us.java code from below and Paste it inside the About_Us.java file. After that, create a New Java File Where you created the previous one, and name it as About_Us_Info.java. Now Copy the About_Us_Info.java Code from below and Paste it inside your About_Us_Info.java file. Now you can run the App :)

First of all Download The Files Given Below and replace it with the files in the "res" Folder of your Project, Like Shown in the Image Below

Download Important Files

[MainActivity.java] Source Code :-

package com.macstockofficial.kunalimagestopdfconv;

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;


import androidx.fragment.app.Fragment;
import androidx.viewpager.widget.ViewPager;
import androidx.appcompat.app.AppCompatActivity;

import android.text.Layout;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import android.os.Bundle;



public class MainActivity extends AppCompatActivity {
    Button btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btn0, btnAdd, btnMultiply, btnDiv, btnMinus, btnDot, btnEqual;
    Button btnClear;
    EditText ed1;
    Float result1, result2;
    boolean Add, Sub, Multiply, Divide;

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.menu, menu);
        return true;
    }


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


        btn1 = (Button) findViewById(R.id.btn1);
        btn2 = (Button) findViewById(R.id.btn2);
        btn3 = (Button) findViewById(R.id.btn3);
        btn4 = (Button) findViewById(R.id.btn4);
        btn5 = (Button) findViewById(R.id.btn5);
        btn6 = (Button) findViewById(R.id.btn6);
        btn7 = (Button) findViewById(R.id.btn7);
        btn8 = (Button) findViewById(R.id.btn8);
        btn9 = (Button) findViewById(R.id.btn9);
        btn0 = (Button) findViewById(R.id.btn0);
        btnAdd = (Button) findViewById(R.id.btnAdd);
        btnMinus = (Button) findViewById(R.id.btnMinus);
        btnMultiply = (Button) findViewById(R.id.btnMultiply);
        btnDiv = (Button) findViewById(R.id.btnDiv);
        btnDot = (Button) findViewById(R.id.btnDot);
        btnEqual = (Button) findViewById(R.id.btnEqual);
        btnClear = (Button) findViewById(R.id.btnClear);
        ed1 = (EditText) findViewById(R.id.editTextTextPersonName);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "1");
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "2");
            }
        });

        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "3");
            }
        });

        btn4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "4");
            }
        });

        btn5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "5");
            }
        });

        btn6.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "6");
            }
        });

        btn7.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "7");
            }
        });

        btn8.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "8");
            }
        });

        btn9.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "9");
            }
        });

        btn0.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ "0");
            }
        });

        btnDot.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText(ed1.getText()+ ".");
            }
        });


        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ed1==null){
                    ed1.setText("");
                }
                else{
                    result1 = Float.parseFloat(ed1.getText() + "");
                    Add = true;
                    ed1.setText(null);
                }
            }
        });
        btnMinus.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ed1==null){
                    ed1.setText("");
                }
                else{
                    result1 = Float.parseFloat(ed1.getText() + "");
                    Sub = true;
                    ed1.setText(null);
                }
            }
        });

        btnMultiply.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ed1==null){
                    ed1.setText("");
                }
                else{
                    result1 = Float.parseFloat(ed1.getText() + "");
                    Multiply = true;
                    ed1.setText(null);
                }
            }
        });

        btnDiv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (ed1==null){
                    ed1.setText("");
                }
                else{
                    result1 = Float.parseFloat(ed1.getText() + "");
                    Divide = true;
                    ed1.setText(null);
                }
            }
        });

        btnEqual.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                result2 = Float.parseFloat(ed1.getText() + "");
                if (Add==true){
                    ed1.setText(result1 + result2 + "");
                    Add = false;
                }
                if (Sub==true){
                    ed1.setText(result1 - result2 + "");
                    Sub = false;
                }
                if (Multiply==true){
                    ed1.setText(result1 * result2 + "");
                    Multiply = false;
                }
                if (Divide==true){
                    ed1.setText(result1 / result2 + "");
                    Divide = false;
                }
            }
        });
        btnClear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ed1.setText("");
            }
        });
    }


    public void about_us(MenuItem menuItem){
        Intent intent = new Intent(this, About_us.class);
        startActivity(intent);
    }


    public void about_us_info(MenuItem menuItem){
        Intent intent = new Intent(this, About_Us_info.class);
        startActivity(intent);
    }




}
    

[About_us.java] Source Code :-

package com.macstockofficial.kunalimagestopdfconv;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class About_us extends AppCompatActivity {

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

    public void subscribe_youtube(View view) {
        Uri uri = Uri.parse("https://www.youtube.com/channel/UCIXud9Ot8pfDQizzdmQ-FyQ?sub_confirmation=1");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);
    }

    public void visitweb(View view) {
        Uri uri2 = Uri.parse("https://macstockofficial.blogspot.com/");
        Intent intent2 = new Intent(Intent.ACTION_VIEW, uri2);
        startActivity(intent2);
    }

    public void about_us_info(View view){
        Intent intent = new Intent(this, About_Us_info.class);
        startActivity(intent);
    }
}
    

[About_Us_info.java] Source Code :-

package com.macstockofficial.kunalimagestopdfconv;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class About_Us_info extends AppCompatActivity {

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

    public void download_app(View view){
        Uri uri = Uri.parse("https://macstockofficial.blogspot.com/p/my-android-app-download-links-full.html");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);
    }
}
    

Hope You Will Like the Project.