Shulou(Shulou.com)06/01 Report--

This article mainly introduces "what is the method of Android state diagram migration". In the daily operation, I believe that many people have doubts about the method of Android state diagram migration. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "what is the method of Android state diagram migration?" Next, please follow the editor to study!

Transfer

Migration is a unidirectional arc that starts at a single source vertex and ends at a single target vertex (the source and target may be the same vertex), which defines a segment of state machine behavior. It can have an associated effect behavior that is executed when the migration is passed (executed).

A migration can have multiple trigger conditions, each of which defines an event. When an event occurs and is sent, it can trigger the passage of the migration. If the event sent matches the event type, the trigger condition can be said to be in a valid state. When a migration defines multiple triggers, they are logically separate, that is, as long as any one of them is in a valid state, the migration is triggered.

In the case of the traffic signal system, of course, it also needs to be migrated, as shown in the figure below. In this example, only trigger conditions, effect behavior and guardianship conditions are introduced in subsequent articles.

Next, take Road1StopSafely as an example to illustrate the action of the state machine.

When the Road1GoTimeout trigger condition is met, the state machine migrates from the Road1Go state to the Road1StopSafely state

The entry behavior of the Road1StopSafely state StartRoad1StopSafely is executed, and the green light in the Road1 direction is lit.

When the Road1StopSafelyTimout condition is met, the Road1StopSafely exit behavior StopRoad1StopSafely is executed, and the red light in the Road1 direction is lit.

The state machine is migrated from Road1StopSafely to Road2Go

At this point, the study of "what is the method of Android state diagram migration" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.