I would like to thank you first. For your precious time. I did android application. Research research. But I noticed something. I have much Activity. I want all of them to listen when an incident happens.
unfortunately I've learned about the listener. However, the listener is the only activity.
When listening to music, I need to show people this.
I'm sorry for my bad english. That's what I want. A Activity B Activity C activity D activity These are my activities.
B activity performed. For example; Music played.
The others will listen.
public void listen (int id, String method) {
// update activity layout
}