Calendar java android studio

Java add calendar to android studio

For example you will choose day and add +15 days, result will be Saturday or Sunday but in this case I need to get always Monday if result is one of these days. Caller: Your method: Sample Run Resultant day was so adding 2 days to get Resultant day was so adding 1 day to get Resultant day was so not adding any more days Solution 2: For an operation like this I definitely recommend using the modern Java date and time API.

Java/Android Calendar, add 1 week on Sundays

OK, so my code has worked good until the day became Sunday.

I’m working on an app that uses the Calendar util allot, so it functioning the way i think it does is important to me! The problem:

 import java.util.Calendar; . Calendar test = Calendar.getInstance(); test.setFirstDayOfWeek(Calendar.MONDAY); Log.e("WEEEK TEST:", ""+ test.get(Calendar.WEEK_OF_YEAR)); test.add(Calendar.WEEK_OF_YEAR, 1); Log.e("WEEEK TEST:", ""+ test.get(Calendar.WEEK_OF_YEAR)); 

 06-01 14:04:07.636 12005-12005/test.app E/WEEEK TEST:﹕ 23 06-01 14:04:07.636 12005-12005/test.app E/WEEEK TEST:﹕ 23 

How can this even happen, and how do i fix it?

Calendar test = Calendar.getInstance(); test.add(Calendar.WEEK_OF_YEAR, -1); test.add(Calendar.WEEK_OF_YEAR, 1); test.setFirstDayOfWeek(Calendar.MONDAY); 

Now «test» should work correctly

Android Calendar View, By default, the Calendar shows the Jan 1, 1970, date. android:maxDate and android:minDate are used to set a custom range on the calendar. The

Calendar App Example Android Studio Tutorial

How to create a simple calendar view using Android Studio and Java. In this example project Duration: 9:32

How to Insert an Event to Calendar Using Android Intent

Hi and welcome to another tutorial from CodingDemos :)In this tutorial, you will learn how to add
Duration: 18:28

Weekly Calendar Android Studio Tutorial

How to create a weekly calendar view using Android Studio and Java. In this example project Duration: 14:10

Add days, android studio

In my application user can chose date with Calendar and then chose how many days he wants add.

Adding days working excellent, but I need to skip weekdays.

For example you will choose day and add +15 days, result will be Saturday or Sunday but in this case I need to get always Monday if result is one of these days.

public static Date addDays(Date date, int days)

Thank you for your help, I am not expert in programming. I am amateur and i am still learning..

You should check what is the resultant day i.e. check if its SATURDAY or SUNDAY and then adding 2 or 1 to get next MONDAY .

NOTE: I do not know what is FirstClass.hotovo so I have removed temporary from below code and you can add it as you would have it in your project. Below is to demonstrate how to check day and add 1 or 2 day respectively.

public static Date addDays(Date date, int days) < Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DATE, days); Log.d("TEST", "BEFORE CHECKING: " + cal.getTime().toString()); // SATURDAY is the last day of week so add 2 days if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY) < cal.add(Calendar.DATE, 2); // SUNDAY is the first day of week so add 1 day >else if (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) < cal.add(Calendar.DATE, 1); >// else not required as it means its one of the week day Log.d("TEST", "AFTER UPDATING: " + cal.getTime().toString()); return cal.getTime(); > 

Resultant day was SATURDAY so adding 2 days to get MONDAY

07-25 15:46:55.729 4219-4219/? D/TEST: BEFORE CHECKING: Sat Aug 12 15:46:55 PDT 2017 07-25 15:46:55.729 4219-4219/? D/TEST: AFTER UPDATING: Mon Aug 14 15:46:55 PDT 2017 

Resultant day was SUNDAY so adding 1 day to get MONDAY

07-25 15:47:57.634 4322-4322/? D/TEST: BEFORE CHECKING: Sun Aug 13 15:47:57 PDT 2017 07-25 15:47:57.634 4322-4322/? D/TEST: AFTER UPDATING: Mon Aug 14 15:47:57 PDT 2017 

Resultant day was TUESDAY so not adding any more days

07-25 15:52:27.115 4445-4445/? D/TEST: BEFORE CHECKING: Tue Aug 15 15:52:27 PDT 2017 07-25 15:52:27.115 4445-4445/? D/TEST: AFTER UPDATING: Tue Aug 15 15:52:27 PDT 2017 

For an operation like this I definitely recommend using the modern Java date and time API. Not only is it generally much nicer to work with than the outdated classes Date and Calendar . It also has some specific advantages in your situation: (1) It offers a LocalDate that represents a date without time of day, which seems to model your data more precisely than the outdated Date , which always includes time-of-day too. (2) Adding days and checking day-of-week is more convenient.

To use the modern API on Android you will need to get the ThreeTenABP, see this question: how to use threetenabp in android project. To use it in Java 8 or later, just dig in, it’s built-in.

public static LocalDate addDays(LocalDate date, int days) < date = date.plusDays(days + FirstClass.hotovo); // weekend? DayOfWeek dow = date.getDayOfWeek(); if (dow.equals(DayOfWeek.SATURDAY) || dow.equals(DayOfWeek.SUNDAY)) < date = date.with(TemporalAdjusters.next(DayOfWeek.MONDAY)); >return date; > 

Please note how clear and self-explanatory the code is compared to code using the old classes (if you think the part with the temporal adjuster looks a bit tricky, you may instead just use date.plusDays() again; I wanted to demonstrate the temporal adjuster to give a bit of impression of the power of the newer classes).

Adding event to Google calendar in android studio, I figured this out. For those interested, you shouldn’t use the Java quickstart at

Android: Calendar add days including month and year

I have a problem. I am using this code to «increase» or «decrease» one day. «value» is 1 or -1 . I have tried c.add(Calendar.DAY_OF_MONTH, value); and c.add(Calendar.DATE, value); The problem is: if value = 1 , it increases day by 1 and month and year don’t budge at all and remain same.

if value = -1 , it decreases day by 1 and after 30 days it decrease the year .

I have tried everything but could not understand the behavior. I need to increase or decrease the whole date like it happens in MYSQ L, not just date or month or year.

SimpleDateFormat sdf = new SimpleDateFormat("dd/mm/yyyy"); Calendar c = Calendar.getInstance(); try < c.setTime(sdf.parse(mDate)); >catch (ParseException e) < e.printStackTrace(); >c.add(Calendar.DAY_OF_MONTH, value); sdf = new SimpleDateFormat("dd/mm/yyyy"); Date resultdate = new Date(c.getTimeInMillis()); String newDtString = sdf.format(resultdate); 

calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + value); 

You’d also have to handle end cases when it’s first or last day of year

Java handles this for you. Example:

Calendar calendar = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat("dd MMMM yyyy"); calendar.setTimeZone(TimeZone.getDefault()); try < calendar.setTime(sdf.parse("31 December 2015")); >catch (ParseException e̋̋) < >System.out.println(sdf.format(calendar.getTime())); calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + 1); System.out.println(sdf.format(calendar.getTime())); 

31 December 2015 01 January 2016 

How to add calendar events in Android App?, This example demonstrates how do I add calendar events in android. Step 1 − Create a new project in Android Studio, go to File ⇒ New

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Android | Creating a Calendar View app

This article shows how to create an android application for displaying the Calendar using CalendarView. It also provides the selection of the current date and displaying the date. The setOnDateChangeListener Interface is used which provide onSelectedDayChange method.

1. onSelectedDayChange: In this method, we get the values of days, months, and years that are selected by the user.

Below are the steps for creating the Android Application of the Calendar.

• Step 1: Create a new project and you will have a layout XML file and java file. Your screen will look like the image below.
  
• Step 2: Open your xml file and add CalendarView and TextView. And assign id to TextView and CalendarView. After completing this process, the xml file screen looks like given below.
  
• Step 3: Now, open up the activity java file and define the CalendarView and TextView type variable, and also use findViewById() to get the Calendarview and textview.
• Step 4: Now, add setOnDateChangeListener interface in object of CalendarView which provides setOnDateChangeListener method. In this method, we get the Dates(days, months, years) and set the dates in TextView for Display.
• Step 5: Now run the app and set the current date which will be shown on the top of the screen.
  Complete code of MainActivity.java or activity_main.xml of Calendar is given below.

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Android Calendar View

While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial.

In this tutorial, we’ll be discussing the Calendar Widget using the CalendarView class in our Android Application.

Android Calendar View

As the name suggests, a Calendar View is used to display and select dates of the Calendar. To add a CalendarView in the XML Layout do the following:

This is how it looks in the Layout Design editor : When you’ll run the above application on your device, it’ll show the current date. By default, the Calendar shows the Jan 1, 1970, date. android:maxDate and android:minDate are used to set a custom range on the calendar. The dates specified are of the format MM/dd/yyyy. To do the same in Java we use setMaxDate() and setMinDate() methods passing the long instance. The getters methods are available for the same. To set the current date we do setDate(long date) on the CalendarView instance. The setDate method has another form: setDate(long date, boolean animate, boolean center) . By default the second and third parameters are true. When you select a new date it animates to it. To change the date and week text style we use the attributes: android:dateTextAppearance and android:weekTextAppearance or their equivalent setters in Java. The CalendarView consists of the following listener:

calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() < @Override public void onSelectedDayChange(@NonNull CalendarView calendarView, int i, int i1, int i2) < >>); 

In the following section, we’ll create an android application with a custom theme and add a custom range on the CalendarView along with showing the difference between animation and non-animation date changes.

Project Structure

Code

In the styles.xml file add the following three styles:

android:textColorPrimary by default is white. This color is set on the month date and the left and right indicators. The code for the activity_main.xml is given below:

We’ve added all the custom styles in the layout above. The three Buttons are chained in the Constraint Layout. The code for the MainActivity.java is given below:

package com.journaldev.androidcalendarview; import android.support.annotation.NonNull; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.CalendarView; import android.widget.Toast; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class MainActivity extends AppCompatActivity implements View.OnClickListener < Calendar calendar; CalendarView calendarView; @Override protected void onCreate(Bundle savedInstanceState) < super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); calendar = Calendar.getInstance(); calendar.set(Calendar.MONTH, Calendar.NOVEMBER); calendar.set(Calendar.DAY_OF_MONTH, 9); calendar.set(Calendar.YEAR, 2012); calendar.add(Calendar.DAY_OF_MONTH, 1); calendar.add(Calendar.YEAR, 1); calendarView = findViewById(R.id.calendarView); Button btnRange = findViewById(R.id.btnRange); btnRange.setOnClickListener(this); Button btnWithoutAnim = findViewById(R.id.btnWithoutAnim); btnWithoutAnim.setOnClickListener(this); Button btnWithAnim = findViewById(R.id.btnWithAnim); btnWithAnim.setOnClickListener(this); calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() < @Override public void onSelectedDayChange(@NonNull CalendarView calendarView, int i, int i1, int i2) < String msg = "Selected date Day: " + i2 + " Month : " + (i1 + 1) + " Year " + i; Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show(); >>); > @Override public void onClick(View view) < switch (view.getId()) < case R.id.btnWithAnim: calendarView.setDate(calendar.getTimeInMillis(), true, true); break; case R.id.btnWithoutAnim: calendar.set(Calendar.DAY_OF_MONTH, 12); calendar.set(Calendar.YEAR, 2016); calendar.add(Calendar.MONTH, Calendar.MARCH); calendarView.setDate(calendar.getTimeInMillis(), false, false); break; case R.id.btnRange: Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DATE)); long endOfMonth = calendar.getTimeInMillis(); calendar = Calendar.getInstance(); calendar.set(Calendar.DATE, 1); calendar.set(Calendar.HOUR_OF_DAY, 0); long startOfMonth = calendar.getTimeInMillis(); calendarView.setMaxDate(endOfMonth); calendarView.setMinDate(startOfMonth); String minDateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(calendarView.getMinDate())); String maxDateString = new SimpleDateFormat("MM/dd/yyyy").format(new Date(calendarView.getMaxDate())); Toast.makeText(getApplicationContext(), "MMDDYYYY Min date - " + minDateString + " Max Date is " + maxDateString, Toast.LENGTH_LONG).show(); break; >> > 

calendar.getActualMaximum(Calendar.DATE) gets the end of the month for the current date. We’ve used SimpleDateFormat to convert the dates into a custom format. The output of the application in action is given below: In the first case, we animate to another date with animation. In the last case, the custom range shows only the July Month. The indicators are disabled. This brings an end to this tutorial. You can download the project from the link below:

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