Last week, we had the author of TDD for a Shopping Website LiveProject. Friday at 11am Ranch time, Steven Solomon will be hosting a live TDD session just for us. See for the agenda and registration link
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Jeanne Boyarsky
  • Tim Cooke
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Carey Brown
  • Frits Walraven
Bartenders:
  • Piet Souris
  • Himai Minh

Button inheritance

 
Greenhorn
Posts: 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Can some one please explain to me why is (in this example) the button class related to android.view??
Should the inheritance be related to android.widget?
Please see attached image
In the packages they are separated but in the reference help, Button is child of android.view.View which is completely separated from android.widget package
I don't understand how this inheritance structure works

Can somebody explain this to me?

Thanks!!!

inheritance.jpg
[Thumbnail for inheritance.jpg]
inheritance
 
Rancher
Posts: 43027
76
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
What, exactly, don't you understand about it? A class that extends some other class does not need to be in the same package (as you can see with android.widget.TextView extending android.view.View).

So when you say "android.view.View which is completely separated from android.widget package", nothing more is at work than the original package structure designer's ideas of what class should go into which package. That has no impact on the workings of those classes (and only a little impact on the overall class hierarchy). Those classes are not "separated" in any fundamental way.
 
Gustaf Garrison
Greenhorn
Posts: 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks for your answer Ulf !
 
That's a very big dog. I think I want to go home now and hug this tiny ad:
Free, earth friendly heat - from the CodeRanch trailboss
https://www.kickstarter.com/projects/paulwheaton/free-heat
reply
    Bookmark Topic Watch Topic
  • New Topic