Question

I have two service, Service A and Service B.How to develop Service B depend on a Service A? When I start Service B,I should know if Service A is running.If Service A is running,start Service B .Else,not start Service B.

Answer 1

So, you question is same with, how to know one service is running or not, right 😉

Android has Activity Manager to do your work.

public boolean checkService(String service) {
        ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
        for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
            if (service.equals(service.service.getClassName())) {
                return true;
            }
        }
        return false;
    }

Th String service should be your class name, for example : com.app.Intent

And this is a pseudocode. I don’t make it detail because many ways to start your service, depend on how you use it.

if checkService("com.app.ServiceA") 
    running ServiceA;
running ServiceB;  // Because I see that ServiceB always still always run, not depend on ServiceA

Hope this help you 🙂