Important safety tip. If a method or constructor requires a Context, don't pass it an Activity. It works, but it's too dangerous. It's just too easy to leak the activity. Better to do activity.getApplicationContext().
Corollary: Follow this rule except when you can't. :-) It turns out that if the code that requires the Context reference needs to start an activity, you'll get an exception if it doesn't set the FLAG_ACTIVITY_NEW_TASK flag in the Intent:
java.lang.RuntimeException: Unable to start activity ... Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
