Design & Structure

When I think about the navigation process I found that we need 4 phase to complete it.

• Phase 1: Creating. Create a navigation action to represent a single process and initial it using a from object which is the origin.
• Phase 2: Parsing. Parse the url and find the target of navigation, witch represented as TargetInfo.
• Phase 3: Assembling. Assemble params and flags to create one real navigation target like Intent or Fragment instance.
• Phase 4: Navigating. This is where startActivity in invoked.

The structure of Rabbits was design like a pipeline, each phase works like a node on the pipeline.

There are some important concept and Classes.

• Action represents a navigation action and contains all the params and intermedia. Every phase process the Action object.
• Interceptor is a very important concept since every phase and every processing node is an Interceptor. Interceptors that you created during initialization is also a sub-class of Interceptor.
• Navigator is which really invoke the startActivity method. Every type (Activity, Fragment, FragmentV4) of target has one paired Navigator instance. To support Fragment navigation, you need create a navigator class and register it to Rabbits.