网络连接检查的地方

Question

I've got a simple hiearachy of activities where: A is abstract and B,C, etc inherit from A. I need a place to handle network connection and it would be good to place it in the parent activity(A). However, I don't see how I can stop code in my child activities(B,C) from executing. Additionally, in each of the onResume methods of the child activities(B,C) I have extra network code which shouldn't be executed as well.

So, is there any way apart from "if" in parent onCreate + "if" in child onCreate + "if" in child onResume ? This approach should be more concise.

Answer 1

keep a boolean in abstract activity A like isNetworkAvliable. check network existence in Oncreate of A or onResume of A ( must call super.onResume in B and C before all work) and put the network in if(isNetworkAvliable).

Answer 2

Try this...

1. Even if B and C are inherited from A, i dont think the methods for handling network will be executed in B and C until you explicitly call them.

2. And if you want to handle the network connection in class A, then create a method in class A as public void handleConnection() , then make calls from class B's and C's onCreate() and onResume() as super.handleConnection();