How to bind two Android Activities to one Service?

Question

我想问一些例子，其中两个不同的活动（第一个活动中的按钮打开第二个活动），正在与一个服务（AIDL等）进行通信我尝试了很多不同的教程，但它们只是关于如何制作一项活动 - >一项服务。

Answer 1

This is probably old, but I'll try to answer it anyways...

In Android, seeing as only one Activity can bind to a Service at a time, and only one Activity can be shown at a time, there is no real reason to want to bind 2 Activities at a time.

But, if you'd like, the best solution is to bind the Service in the onResume() method, and unbind it in the onPause() method. This allows you to give two un-related Activities access to the service, while only having one bound at a time.

Answer 2

Each Activity is responsible for binding and unbinding from the Service . This is normally done in onResume / onPause , or onStart / onStop , depending on your requirements. One Activity cannot bind another Activity to a Service . That's just the way it is. :)

Answer 3

You can do it by using Messenger that provide IPC communication without using AIDL. This is how you can bind multiple activities to a service.

If you need your service to communicate with remote processes, then you can use a Messenger to provide the interface for your service. This technique allows you to perform interprocess communication (IPC) without the need to use AIDL.

Have a look at this link . When you see the code, you will find a switch case withing a Handler, this will cater to the multiple requests that you will send from you multiple activities/components. Thanks. I hope the answer will be of help to you.