![Why use android annotations?
Goals
We want to facilitate the writing and maintenance of android applications
Android Annotations strives to achieve these goals by making code simple to
understand with clear intents
Robert C. Martin (Uncle Bob)
"The ratio of time spent reading [code] versus writing is well over 10 to 1
[therefore] making it easy to read makes it easier to write."
Using Java annotations, developers can show their intent and let
AndroidAnnotations generate the plumbing code at compile time.](https://image.slidesharecdn.com/it496-joelsticha-androidannotationspresentation-130522203550-phpapp02/85/Android-Annotations-and-RoboGuice-3-320.jpg)
Android Annotations and RoboGuice
- 2. AndroidAnnotations AndroidAnnotations was created by Pierre-Yves Ricau and is sponsored by eBusinessInformations.
- 3. Why use android annotations? Goals We want to facilitate the writing and maintenance of android applications Android Annotations strives to achieve these goals by making code simple to understand with clear intents Robert C. Martin (Uncle Bob) "The ratio of time spent reading [code] versus writing is well over 10 to 1 [therefore] making it easy to read makes it easier to write." Using Java annotations, developers can show their intent and let AndroidAnnotations generate the plumbing code at compile time.
- 4. Features of AndroidAnnotations Dependency injection: inject views, extras, system services, resources, ... Simplified threading model: annotate your methods so that they execute on the UI thread or on a background thread. Event binding: annotate methods to handle events on views, no more ugly anonymous listener classes! REST client: create a client interface, AndroidAnnotations generates the implementation. AndroidAnnotations provide those good things and even more for less than 50kb, without any runtime performance impact!
- 5. Is your Android code easy to write, read, and Maintain?
- 7. Android Annotations bottom line It takes out the most repetitive code in your application It helps you create cleaner code that is easier to read It can be included with small changes to your project and editing environment Add two jar files to the Java Build Path for your project. Add AndroidAnnotations as a annotation processor in the Java Compiler Settings Rename the activities to xxxx_
- 8. RoboGuice Dependency Injection for Android Current Version is 2.0
- 9. What RoboGuice Does RoboGuice is a dependency injection framework for Android It uses the Google Guice framework as the backbone
- 10. Classic android
- 12. Example Program
Editor's Notes
- #4: While we all enjoy developing Android applications, we often wonder: Why do we always need to write the same code over and over? Why are our apps harder and harder to maintain? Context and Activitygod objects, complexity of juggling with threads, hard to discover API, loads of anonymous listener classes, tons of unneeded casts... can't we improve that?Robert C. Martin (Uncle Bob)"The ratio of time spent reading [code] versus writing is well over 10 to 1 [therefore] making it easy to read makes it easier to write."
- #5: AndroidAnnotations has a little compilation overhead (how it works), but the generated classes are good old classic Android code. No reflection. No startup time, and no runtime impact.
- #6: Annotations do not need the id unless it differs from the java object name.Easy threading
- #9: My Examples will be using v1.1.1