Can Somebody Explain this java code

Question

I\'m just starting out on android and my java is verry rusty. I can\'t remember ever seeing a function nested in another function like this before. Could somebody explain to

Answer 1

• This is an Anonymous Class. What is actually happening is that a subclass of Handler is being created with an overridden handleMessage function.

  One of the most elegant things about anonymous classes is that they allow you to define a one-shot class exactly where it is needed. In addition, anonymous classes have a succinct syntax that reduces clutter in your code.

• You also asked "Could somebody explain to me exactly what final does". A nice explanation can be found here.

  In the case of your example the final keyword stops anybody from being able to assign a new instance / null the instance of the variable "handler" meaning I cannot write the line handler = null; or handler = new Handler() { ... } after your example code snippet.