nullpointerexception

When is the Android Fragment onCreateOptionsMenu method called? alvin August 3, 2017 - 12:36pm

Android FAQ: When is the Android Fragment onCreateOptionsMenu method called?

I was just working through a problem with an Android Menu and MenuItem, and added some debug code to the methods in my Android Fragment, and found that the onCreateOptionsMenu method is called after onStart. I didn’t put Log/debug code in every activity lifecycle method, but for the ones I did add logging code to, the specific order of the fragment method calls looked like this:

Solution to the Scala jar class file is broken error alvin March 26, 2013 - 2:00pm

I just ran into the following Scala jar (class) is broken error:

Using the Scala Option, Some, and None idiom (instead of Java null)

A powerful Scala idiom is to use the Option class when returning a value from a function that can be null. Simply stated, instead of returning one object when a function succeeds and null when it fails, your function should instead return an instance of an Option, where the Option object is either: