Android Billing service - where to bind? -

i have specific workflow in android application, don't know should bind billing service.

initially app starts first background task determines location of user , afterwards calls second background task, because can run after location has been determined.

now want second background task execute if subscription active.

the problem both events - start of second task , obtaining service connection - undetermined in time, don't know how synchronize between them.

example activity:

public class myactivity extends activity {     public void onlocationchanged(location location)     {         // callback called when location obtained     }      public void onserviceconnected(componentname name, ibinder service)     {         // called when service connected         mservice = iinappbillingservice.stub.asinterface(service);     }  } 

you can use synchronized int counter, each of steps you've completed, increase one. , every time complete step, call method see if task complete , next task can started, psudo code:

public synchroized boolean executenext() {    completedcount++;    if(completedcount == total_steps) {        //starts next task here        return true;    }    return false; }