Skip to main content

Simple Calculator with Spinner – Android Code

This code is a simple code for Android application. It has two textboxes to receive two numbers (decimal), list of mathematical operations with +, –, * and /. Choose the operation, and hit the “Display result” button. You will see the answer to the at the bottom of the button. Have fun with Android.

image image

The Manifest file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<EditText android:text="@+id/EditText01" 
	android:id="@+id/EditText01" 
	android:layout_width="fill_parent" 
	android:layout_height="wrap_content">
	</EditText>
<EditText android:text="@+id/EditText02" 
	android:id="@+id/EditText02" 
	android:layout_width="fill_parent" 
	android:layout_height="wrap_content">
	</EditText>
<Spinner android:id="@+id/Spinner01" 
	android:layout_width="fill_parent" 
	android:layout_height="wrap_content">
	</Spinner>
	
<Button android:text="@+id/Button01" 
	android:id="@+id/Button01" 
	android:layout_width="fill_parent" 
	android:layout_height="wrap_content">
	</Button>
<TextView android:text="@+id/TextView01" 
	android:id="@+id/TextView01" 
	android:layout_width="fill_parent" 
	android:layout_height="wrap_content">
	</TextView>
</LinearLayout>


The Code



 









package my.android.calc;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.AdapterView.OnItemSelectedListener;
public class Calc extends Activity implements OnItemSelectedListener{
    /** Called when the activity is first created. */
    EditText num1, num2;
	Button button01;
	TextView tv1;
	ImageView iv1;
	Spinner spinOps;
	String[] ops={"Choose operation","+","-","*","/"};
	String opselected;
	double a, b, c;
    private OnClickListener myClickListener = new OnClickListener()
    {
    	public void onClick(View v) {
    		a=Double.parseDouble(num1.getText().toString()); 
    		b=Double.parseDouble(num2.getText().toString()); 
    		if (opselected=="+"){c=a+b; tv1.setText(Double.toString(c));}
    		else if (opselected=="-"){c=a-b; tv1.setText(Double.toString(c));}
    		else if (opselected=="*"){c=a*b; tv1.setText(Double.toString(c));}
    		else if (opselected=="/"){c=a/b; tv1.setText(Double.toString(c));}
    		else {tv1.setText("Please select the operation");}
    		//tv1 = (TextView)findViewById(R.id.TextView01);
    		
    		
    	}
    };
        @Override
        public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.main);
            
           tv1 = (TextView)findViewById(R.id.TextView01);
           //iv1= (ImageView)findViewById(R.id.);//try imageview
           
           button01 = (Button)findViewById(R.id.Button01);
           button01.setText("Display result");
           button01.setOnClickListener(myClickListener);
           
           num1 = (EditText)findViewById(R.id.EditText01);
           num1.setText("");
           num2 = (EditText)findViewById(R.id.EditText02);
           num2.setText("");
           
           //list of operations
           spinOps = (Spinner)findViewById(R.id.Spinner01);
           ArrayAdapter<String> adapter = new ArrayAdapter<String>(
             this, android.R.layout.simple_spinner_item, ops);
           adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
           spinOps.setAdapter(adapter);
           spinOps.setOnItemSelectedListener(this);
           
        }   
        public void onItemSelected (AdapterView<?> p,View v,int position,long id) {
        	opselected=ops[position];
        	tv1.setText("You have selected " + opselected);
        }
        public void onNothingSelected(AdapterView<?> p) { 
        	tv1.setText("Please select ops"); 
        }
}


image Android Developer in the Making…

Comments

Popular posts from this blog

Several English proverbs and the Malay pair

Or you could download here for the Malay proverbs app – https://play.google.com/store/apps/details?id=net.kerul.peribahasa English proverbs and the Malay pair Corpus Reference: Amir Muslim, 2009. Peribahasa dan ungkapan Inggeris-Melayu. DBP, Kuala Lumpur http://books.google.com.my/books/about/Peribahasa_dan_ungkapan_Inggeris_Melayu.html?id=bgwwQwAACAAJ CTRL+F to search Proverbs in English Definition in English Similar Malay Proverbs Definition in Malay 1 Where there is a country, there are people. A country must have people. Ada air adalah ikan. Ada negeri adalah rakyatnya. 2 Dry bread at home is better than roast meat home's the best hujan emas di negeri orang,hujan batu di negeri sendiri Betapa baik pun tempat orang, baik lagi tempat sendiri. 3 There's no accounting for tastes We can't assume that every people have a same feel Kepala sama hitam hati lain-lain. Dalam kehidupan ini, setiap insan berbeza cara, kesukaan, perangai, tabia

Submit your blog address here

Create your own blog and send the address by submitting the comment of this article. Make sure to provide your full name, matrix and URL address of your blog. Refer to the picture below. Manual on developing a blog using blogger.com and AdSense, download here … Download Windows Live Writer (a superb offline blog post editor)

Applications of Web 2.0

Web 2.0 describes the changing trends in the use of World Wide Web technology and web design that aim to enhance creativity , secure information sharing, collaboration and functionality of the web. Web 2.0 concepts have led to the development and evolution of web-based communities and hosted services , such as social-networking sites , video sharing sites , wikis , blogs . Find a website or web application that conform to the criteria of Web 2.0. Put the name of the application and the URL in the comment below. Please provide your full name and matrix number. Make sure the application you choose is not already chosen by your friend in the previous comment.

Bootstrap Template for PHP database system - MyCompanyHR

HTML without framework is dull. Doing hard-coded CSS and JS are quite difficult with no promising result on cross platform compatibility. So I decided to explore BootStrap as they said it is the most popular web framework. What is BootStrap? - Bootstrap is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first web sites. (  http://www.w3schools.com/bootstrap/   ) Available here -  http://getbootstrap.com/ Why you need Flat-UI? Seems like a beautiful theme to make my site look professional. Anyway you could get variety of BootStrap theme out there, feel free to select here  http://bootstraphero.com/the-big-badass-list-of-twitter-bootstrap-resources/ Flat-UI is from DesignModo -   http://designmodo.com/flat/ Web Programming MyCompanyHR – PHP & MySQL mini project (with Boostrap HTML framework) Template 1: Template for the Lab Exercise. This is a project sample of a staff record management system. It has the PHP structured co

List of Malay stop words

Malay Stop Word List ada inikah sampai adakah inilah sana adakan itu sangat adalah itukah sangatlah adanya itulah saya adapun jadi se agak jangan seandainya agar janganlah sebab akan jika sebagai aku jikalau sebagaimana akulah jua sebanyak akupun juapun sebelum al juga sebelummu alangkah kalau sebelumnya allah kami sebenarnya amat kamikah secara antara kamipun sedang antaramu kamu sedangkan antaranya kamukah sedikit apa kamupun sedikitpun apa-apa katakan segala apabila ke sehingga apakah kecuali sejak apapun kelak sekalian atas kembali