Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Is there a publish/subscribe pattern in android?
What I want to achieve is I have this class that can notify interested party of an event. Then the interested party can do whatever it needs.
Coming from a .net microsoft world, this sort of thing are build in.
Do android have something similar, or I have to write some thing like an observer pattern?
I think you are speaking in terms of passing events/messages among classes within your application. So this question probably goes down to Java implementation of such a pattern.
There’s nothing actually already baked in (i.e. no
eventsystem class), one of the most common way to let a class spread an event/message is the Listener technique (see wikipedia, Vogel, IBM).There are frameworks too, as from this SO answer.
If you are concerned about async messages across thread/processes in Android, then there are Handlers, AsyncTasks and (for inter-process) Parcelables.