Skip to main content

AGE CALCULATOR - ANDROID

In this Android tutorial let us learn about how to create a nice small Android app which will help you to find out your age by year, month and days.




Above screen shows the simple layout of an age calculator application, here select your date of birth by touch the Date of Birth button. Now the screen will looks like below




Now your age got calculated and display in result field and also pop up as toast as given below




Now follow the coding to develop this simple application

1. Age Calculator Layout (mainactivity.xml)



<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/whatzappBorder" >
//apply your favourite color 
    
    <Button
        android:id="@+id/button1"
        style="@style/Btn"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="5dp"
        android:text="Date Of Birth" />
//apply your button style

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button1"
        android:textColor="@color/golden"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="23dp"
        android:text="Current Date"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:textColor="@color/golden"
        android:layout_marginTop="18dp"
        android:text="Birth Date"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView2"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:textColor="@color/golden"
        android:layout_marginTop="16dp"
        android:text="Result"
        android:textStyle="bold" />

</RelativeLayout>



2. Main Class ( MainActivity.java)



public class MainActivity extends Activity implements OnClickListener {

private Button btnStart;
static final int DATE_START_DIALOG_ID = 0;
private int startYear = 1900;
private int startMonth = 6;
private int startDay = 15;
private AgeCalculation age = null;
private TextView currentDate;
private TextView birthDate;
private TextView result;
StringTokenizer tok;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
age = new AgeCalculation();
currentDate = (TextView) findViewById(R.id.textView1);
currentDate.setText("Current Date(DD/MM/YY) : " + age.getCurrentDate());
birthDate = (TextView) findViewById(R.id.textView2);
result = (TextView) findViewById(R.id.textView3);
btnStart = (Button) findViewById(R.id.button1);
btnStart.setOnClickListener(this);

}

@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_START_DIALOG_ID:
return new DatePickerDialog(this, mDateSetListener, startYear,
startMonth, startDay);
}
return null;
}

private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
startYear = selectedYear;
startMonth = selectedMonth;
startDay = selectedDay;
age.setDateOfBirth(startYear, startMonth, startDay);
birthDate.setText("Date of Birth(DD/MM/YY): " + selectedDay + ":"
+ (startMonth + 1) + ":" + startYear);
calculateAge();
}
};

public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.button1:
showDialog(DATE_START_DIALOG_ID);
break;

default:
break;
}
}

private void calculateAge() {
age.calcualteYear();
age.calcualteMonth();
age.calcualteDay();
String aggg;

aggg = age.getResult();
//Tokenizer
tok = new StringTokenizer(aggg, ":");

String dat1 = tok.nextToken();
String mon1 = tok.nextToken();
String year1 = tok.nextToken();

Toast.makeText(
getBaseContext(),
"Your age is " + year1 + " years " + mon1 + " months and "
+ dat1 + "days", Toast.LENGTH_LONG).show();
result.setText("AGE (DD/MM/YY) :" + age.getResult());
}
}



3. Sub class ( AgeCalculation.java)



public class AgeCalculation {
    private int startYear;
    private int startMonth;
    private int startDay;
    private int endYear;
    private int endMonth;
    private int endDay;
    private int resYear;
    private int resMonth;
    private int resDay;
    private Calendar start;
    private Calendar end;
    public String getCurrentDate()
{
 end=Calendar.getInstance();
 endYear=end.get(Calendar.YEAR);
 endMonth=end.get(Calendar.MONTH);
 endMonth++;
 endDay=end.get(Calendar.DAY_OF_MONTH);
 return endDay+":"+endMonth+":"+endYear;
}
public void setDateOfBirth(int sYear, int sMonth, int sDay)
    {
startYear=sYear;
startMonth=sMonth;
startMonth++;
startDay=sDay;
 
    }
public void calcualteYear()
{
resYear=endYear-startYear;
 
}
public void calcualteMonth()
{
if(endMonth>=startMonth)
{
resMonth= endMonth-startMonth;
}
else
{
resMonth=endMonth-startMonth;
resMonth=12+resMonth;
resYear--;
}
 
}
public void  calcualteDay()
{

if(endDay>=startDay)
{
resDay= endDay-startDay;
}
else
{
resDay=endDay-startDay;
resDay=30+resDay;
if(resMonth==0)
{
resMonth=11;
resYear--;
}
else
{
resMonth--;
}
 
}
}
 
public String getResult()
{
return resDay+":"+resMonth+":"+resYear;
}
public long getSeconde()
{
start=Calendar.getInstance();
start.set(Calendar.YEAR, startYear);
start.set(Calendar.MONTH, startMonth);
start.set(Calendar.DAY_OF_MONTH, startDay);
start.set(Calendar.HOUR, 12);
start.set(Calendar.MINUTE, 30);
start.set(Calendar.SECOND, 30);
start.set(Calendar.MILLISECOND, 30);
    long now=end.getTimeInMillis();
long old=start.getTimeInMillis();
long diff=old-now;
return diff/1000;
}
}


______________________________________________________

Source code for this application AgeCalculatorApp.zip

                                                    Happy Coding...

Comments

Post a Comment

Popular posts from this blog

Zoom Image - Android Tutorial

Here we are going to see how to zoom an image in Imageview Will see it through a sample 1. Create xml with an ImageView <? xml version="1.0" encoding="utf-8" ?> < androidx.constraintlayout.widget.ConstraintLayout       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" >     < LinearLayout         android:layout_width="200dp"         android:layout_height="200dp"         app:layout_constraintBottom_toBottomOf="parent"         app:layout_constraintLeft_toLeftOf="parent"         app:layout_constraintRight_toRightOf="parent"    ...
Post a Comment
Read more

Multi language support

This post will help you yo learn how to make Multi language supported app in android. Why Multi language? In order to targeting global audience, it will be beneficial if you make your app localized. While localizing, you should think about text, audio, currency, numbers and graphics depending upon the region or country. But in this tutorial language only covered. Note: Whenever you are making any android application, Always declare text you want to use in your application in strings.xml only. <string name="hello">Hello World!</string> How String Localization Works? By default android considers English as primary language and loads the string resources from res >> values >> strings.xml . When you want to make Multilanguage supported app, you need to create a values folder by appending a Hyphen (-) and the ISO language code. For example for Hindi, values-hi named folder should be created and keep a strings.xml file in it wit...
Post a Comment
Read more

Add custom font in Android using Calligraphy library

Are you fed up of Custom Views to set fonts? Or traversing the ViewTree to find TextViews? Sometime we want some other font for our Android application then you can add custom font in Android using Calligraphy library . Dependency Include the dependency Download (.aar) dependencies { compile ‘uk.co.chrisjenx:calligraphy:2.2.0’ } Add Fonts Add your custom fonts to assets/ . All font definitions are relative to this path. On Assets you should right-click New Directory, call it "fonts". In the finder put the .ttf  or .otf  font files in there. Create Class Create a class that extends Application and write this code public class App extends Application { @Override public void onCreate() { super.onCreate(); CalligraphyConfig.initDefault(new CalligraphyConfig.Builder() .setDefaultFontPath("your font path") .setFontAttrId(...
Post a Comment
Read more