Inserting a new entry to android calendar

I am trying to add a new event into the android calendar. Here is the code I am using

Intent intent = new Intent(Intent.ACTION_EDIT);
                    intent.setType("vnd.android.cursor.item/event");
                    intent.putExtra("title", event.getSummary());
                    intent.putExtra("description", event.getDescription());
                    intent.putExtra("eventLocation", event.getLocation());
                    intent.putExtra("dtstart", event.getStartDate());
                    if(event.getEndDate() == null)
                    {
                        intent.putExtra("allDay", true);
                    }
   开发者_StackOverflow中文版                 else
                    {
                        intent.putExtra("dtend", event.getEndDate());
                    }

                    startActivity(intent);

I am implementing this method in a separate class which is not an activity class. So I am extending the activity class here.

When i execute last line startActivity(intent); I am getting java nullpointer exception.

No idea how to proceed.

How could I add a entry in to android calendar? Thanks

Are you instantiating your activity class with new? You can not do that. Activity classes must be instantiated by OS in order to be functional.

Solution:

You have to have a reference to Context in order to call context.startActivity(..). Pass an instance of context to your class in constructor. Hint: all Activities are Contexts, so just do new MyClass(this) from within an Activity.

Also, your class does not need to extend Activity.