CalendarView like Google Calendar in Android

CalendarView like Google Calendar in Android

Step: 1

Add Dependency to build.gradle

compile 'com.github.sundeepk:compact-calendar-view:1.8.3'

Step: 2 Create an XML Layout like below with CompactCalendarView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        android:elevation="4dp"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
    <com.github.sundeepk.compactcalendarview.CompactCalendarView
        android:id="@+id/compactcalendar_view"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:paddingLeft="16dp"
        android:paddingRight="16dp"
        app:compactCalendarBackgroundColor="#00bcd4"
        app:compactCalendarCurrentDayBackgroundColor="#1a8cd7"
        app:compactCalendarCurrentSelectedDayBackgroundColor="#E57373"
        app:compactCalendarTextColor="#FFF"
        app:compactCalendarTextSize="12sp" />
</LinearLayout>

Step: 3 Create a Activity

import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.widget.Toast;
import com.github.sundeepk.compactcalendarview.CompactCalendarView;
import com.github.sundeepk.compactcalendarview.domain.CalendarDayEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
    private Toolbar toolbar;
    CompactCalendarView compactCalendarView;
    private SimpleDateFormat dateFormatForMonth = new SimpleDateFormat("MMMM- yyyy", Locale.getDefault());
    private Calendar currentCalender = Calendar.getInstance(Locale.getDefault());
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        final ActionBar actionBar = getSupportActionBar();
        actionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24px);
        actionBar.setDisplayHomeAsUpEnabled(true);
        // Setting default toolbar title to empty
        actionBar.setTitle(null);
        compactCalendarView = (CompactCalendarView) findViewById(R.id.compactcalendar_view);
        compactCalendarView.drawSmallIndicatorForEvents(true);
        compactCalendarView.setUseThreeLetterAbbreviation(true);
        //set initial title
        actionBar.setTitle(dateFormatForMonth.format(compactCalendarView.getFirstDayOfCurrentMonth()));
        //set title on calendar scroll
        compactCalendarView.setListener(new CompactCalendarView.CompactCalendarViewListener() {
            @Override
            public void onDayClick(Date dateClicked) {
                Toast.makeText(MainActivity.this, "Date : " + dateClicked.toString(), Toast.LENGTH_SHORT).show();
            }
            @Override
            public void onMonthScroll(Date firstDayOfNewMonth) {
                // Changes toolbar title on monthChange
                actionBar.setTitle(dateFormatForMonth.format(firstDayOfNewMonth));
            }
        });
        addDummyEvents();
        //  gotoToday();
    }
    // Adding dummy events in calendar view for April, may, june 2016
    private void addDummyEvents() {
        addEvents(compactCalendarView, Calendar.APRIL);
        addEvents(compactCalendarView, Calendar.MAY);
        addEvents(compactCalendarView, Calendar.JUNE);
        // Refresh calendar to update events
        compactCalendarView.invalidate();
    }
    // Adding events from 1 to 6 days
    private void addEvents(CompactCalendarView compactCalendarView, int month) {
        currentCalender.setTime(new Date());
        currentCalender.set(Calendar.DAY_OF_MONTH, 1);
        Date firstDayOfMonth = currentCalender.getTime();
        for (int i = 0; i < 6; i++) {
            currentCalender.setTime(firstDayOfMonth);
            if (month > -1) {
                currentCalender.set(Calendar.MONTH, month);
            }
            currentCalender.add(Calendar.DATE, i);
            setToMidnight(currentCalender);
            compactCalendarView.addEvent(new CalendarDayEvent(currentCalender.getTimeInMillis(), Color.argb(255, 255, 255, 255)), false);
        }
    }
    private void setToMidnight(Calendar calendar) {
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
    }
    public void gotoToday() {
        compactCalendarView.setCurrentDate(Calendar.getInstance(Locale.getDefault()).getTime());
    }
}

Explain : code Android
Method 1: Adding dummy events in calendar view for April, may, june 2016

private void addDummyEvents() {
        addEvents(compactCalendarView, Calendar.APRIL);
        addEvents(compactCalendarView, Calendar.MAY);
        addEvents(compactCalendarView, Calendar.JUNE);
        // Refresh calendar to update events
        compactCalendarView.invalidate();
    }

Method 2: Adding events from 1 to 6 days

private void addEvents(CompactCalendarView compactCalendarView, int month) {
        currentCalender.setTime(new Date());
        currentCalender.set(Calendar.DAY_OF_MONTH, 1);
        Date firstDayOfMonth = currentCalender.getTime();
        for (int i = 0; i < 6; i++) {
            currentCalender.setTime(firstDayOfMonth);
            if (month > -1) {
                currentCalender.set(Calendar.MONTH, month);
            }
            currentCalender.add(Calendar.DATE, i);
            setToMidnight(currentCalender);
            compactCalendarView.addEvent(new CalendarDayEvent(currentCalender.getTimeInMillis(), Color.argb(255, 255, 255, 255)), false);
        }
    }

Method 3: Set calendar

private void setToMidnight(Calendar calendar) {
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
    }

Method 4: get today

public void gotoToday() {
        compactCalendarView.setCurrentDate(Calendar.getInstance(Locale.getDefault()).getTime());
    }

Link gitHub: https://github.com/SundeepK/CompactCalendarView