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Date comparison Validation in android

Anonymous User 3219 30-Dec-2015
I have  edit texts for start date and End date. I want to implement date validation which will check whether the end date is greater than start date or not. Please suggest me the right way.

I have tried to find out the difference between two dates in day in my code : 
             //EditText with string of start date
            dataInicio = (EditText)findViewById(R.id.ses_dpDataIni);
             //EditText with string of end date
    dataFim = (EditText)findViewById(R.id.ses_dpDataFim);
             //Convert String to calendar to check the difference between two dates..
    try{
    dateInic = dataInicio.getText().toString();
    dateFim = dataFim.getText().toString();
    calInic=Calendar.getInstance();
    calFim = Calendar.getInstance();
    calInic.setTime(form.parse(dateInic));
    calFim.setTime(form.parse(dateFim));
    }
     catch (ParseException e) { 
         e.printStackTrace(); 
    } 
    Log.w(SessaoQuotaEdit.class.getName(),"DIFERENCA DE DIAS"  +daysBetween(calInic,calFim));
    tvDiasQuotas = (TextView)findViewById(R.id.ses_tvNumDiasQuota);
    tvDiasQuotas.setText("NUMBER OF DAYS: " +daysBetween(calInic,calFim));
            //CHECK IS END-DATE IS GREATER THAN START-DATE
             .............
             .............
android android  android edittext 
Updated on 28-Jun-2023
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2 Answers

Aryan Kumar

Aryan Kumar

27-Jun-2023

Sure, here is how to do date comparison validation in Android:

Code snippet

import java.util.Calendar;
import java.util.Date;

public class DateComparisonValidation {

    public static boolean isDate1AfterDate2(Date date1, Date date2) {
        Calendar calendar1 = Calendar.getInstance();
        calendar1.setTime(date1);

        Calendar calendar2 = Calendar.getInstance();
        calendar2.setTime(date2);

        return calendar1.after(calendar2);
    }

    public static void main(String[] args) {
        Date date1 = new Date();
        Date date2 = new Date();

        if (isDate1AfterDate2(date1, date2)) {
            System.out.println("Date1 is after Date2");
        } else {
            System.out.println("Date1 is not after Date2");
        }
    }
}

In this code, we first create two Date objects, date1 and date2. Then, we call the isDate1AfterDate2() method to compare the two dates. The isDate1AfterDate2() method returns a boolean value, which indicates whether date1 is after date2.

Finally, we print a message to the console to indicate the result of the comparison.

Here is an explanation of the code:

  • The Calendar.getInstance() method returns a Calendar object that represents the current date and time.
  • The setTime() method sets the Calendar object to the specified date.
  • The after() method returns a boolean value, which indicates whether the specified date is after the current date.
Anonymous User

Anonymous User

30-Dec-2015
Hi Glen,

Use this code:
SimpleDateFormat dfDate  = new SimpleDateFormat("yyyy-MM-dd");
public static boolean CheckDates("2012-07-12", "2012-06-12)"    {
    boolean b = false;
    try {
        if(dfDate.parse(d1).before(dfDate.parse(d2)))
        {
            b = true;//If start date is before end date
        }
        else if(dfDate.parse(d1).equals(dfDate.parse(d2)))
        {
            b = true;//If two dates are equal
        }
        else
        {
            b = false; //If start date is after the end date
        }
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return b;
}
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