Exception

[gaganAriel]

import android.app.Activity;
import android.os.Bundle;

import com.wefika.calendar.CollapseCalendarView;
import com.wefika.calendar.manager.CalendarManager;

import org.joda.time.LocalDate;

public class CalendarDemo extends Activity {

private CollapseCalendarView mCalendarView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    CalendarManager manager = new CalendarManager(LocalDate.now(), CalendarManager.State.MONTH, LocalDate.now(), LocalDate.now().plusYears(1));

    mCalendarView = (CollapseCalendarView) findViewById(R.id.calendar);
    mCalendarView.init(manager);
}

}

while init method called i'm not able to set manager