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

Contact Us at blog.kerul.net

Powered by EMF HTML Contact Form

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

The Challenges of Handling Proverbs in Malay-English Machine Translation – a research paper

*This paper was presented in the 14th International Conference on Translation 2013 ( http://ppa14atf.usm.my/ ). 27 – 29 August 2013, Universiti Sains Malaysia, Penang. The PDF version is here: www.scribd.com/doc/163669571/Khirulnizam-The-Challenges-of-Automated-Detection-and-Translation-of-Malay-Proverb The test data is here: http://www.scribd.com/doc/163669588/Test-Data-for-the-Research-Paper-the-Challenges-of-Handling-Proverbs-in-Malay-English-Machine-Translation Khirulnizam Abd Rahman, Faculty of Information Science & Technology, KUIS Abstract: Proverb is a unique feature of Malay language in which a message or advice is not communicated indirectly through metaphoric phrases. However, the use of proverb will cause confusion or misinterpretation if one does not familiar with the phrases since they cannot be translated literally. This paper will discuss the process of automated filtering of Malay proverb in Malay text. The next process is translation. In machine translatio

Most used STRING functions in my PHP coding

These are my favourite string manipulation functions in my daily coding life. Dedicated especially to Web Programming students. Read them and have fun. Expect a happiness after a storm , and you’ll find your “inner peace”… This post is still in draft. I’ll update and refine with more examples that I’ve personally develop. More after the break…