UML Activity Diagram Overview

Activity diagram, her English name is active Diagram, a workflow that describes the implementation of a business use case, which is one of the none of the diagrams used in the UML family to model dynamic aspects of the system.

To give a simple example, to build a work flow for example, first of all, we have to select an address, and then commissioned an architect to design the house, when we have confirmed the plan, developers to bid for the house, once we agree to a price and design plan, we can start building the house, and then, Start a series of activities, get the license, break ground, dig the foundation and build the frame, until the house is complete, finally, we got the door key and residency certificate, we have our own house. Of course, there's a lot of trivia going on in building a house, but these are the key parts of the workflow. Next, let's learn about the activity diagram, and first, let's take a look at the overall overview of this chapter:

A more comprehensive understanding of the overall content, next, we look at the activity diagram concept and some basic elements:

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Next, we touch on a whole new concept, lane-used to group activities in activity diagrams, to describe the relationships between objects, and the application of lanes, which we show in the example. So the magical activity diagram, actually has what kind of magical action, looks the following picture:

There is also an important knowledge of the activity diagram is the representation of the graph, her representation and use case diagram, Class diagram, what are the different places, next, I use the basic drawing of the activity diagram, depicts the activity diagram of the symbol, we will wait and see: