A couple of questions... See below: On Dec 19 2008, 8:46 pm, "Dianne Hackborn" <[email protected]> wrote: > Yes, there are a number of options: > > (1) In your activity use registerReceiver() for your own custom action > (scoped to your package), and broadcast to that from the service. We aware > that this opens you up to -any- application broadcasting to you through it > unless you also define and require a signature-based permission. > > (2) Create a PendingIntent to send results back to your activity and give it > to the service. The service should be able to use to to send you data that > you receive in onActivityResult(). Note that each time the result is > delivered your activity will go through onPause() and onResume(). >
"...and give it to the service." - How do I "give it to the service?". with intent.putExtra ? Since PendingIntent is a Parcelable? > (3) Create a Handler in your activity, create a Messenger pointing to it, > and give the Messenger to the service. The service can then just deliver > whatever messages it wants back to the activity. "...and give it to the service." (Same as above) ...with intent.putExtra ? Since a messenger is a Parcelable? > > (4) Easiest way: if your service and activity is running in the same process > (I would expect this to be the common case), then follow the local service > API demo where you can just directly call each other. Or have a global > pointing to your activity while it is running that the service looks at, > etc. A global ? As in "a global variable in the Application object?" I somehow felt that was bad practice. > > For most app developers, I strong encourage that they have their service run > in the same process as their activities, take advantage of that by using > globals and direct calls between them, and end up with a much simpler > situation to deal with and a much lighter-weight application (by avoiding > having multiple processes running at the same time). > > On Fri, Dec 19, 2008 at 11:49 AM, Noonien Soong > <[email protected]>wrote: > > > > > > > I got a question related to this. > > > I have an activity and a service. Right now they communicate via 2 > > connections with 2 binders like this: > > Activity binds to Service > > Service sets up callback binding to Activity > > Activity calls remote function in service over AIDL-thing ... ... > > Service loads current data from sqlite DB. > > Service starts thread and does some work. > > Service saves the new state into the sqlite DB. > > Work-Thread on Service is done. > > now : Service sends a notice back to the Activity telling the activity > > the operation has completed. > > This is either done by a callback if the Activity is still up or with > > the Notification-functionality ( the little icon thing on top of the > > screen ), if the activity is down. > > ( note: when the activity goes down, the service learns of that fact. > > so when the work-thread is done, I know about the state of the > > Activity ). > > > now my question: Since the communication between my service and my > > activity ( in either direction) is pretty simple ( just function > > calls, no other data submitted), I was wondering if I could do the > > thing simply by sending intents back and forth. I know how to send > > intents from the Activity to the Service ( startService() ), but how > > do I send intends the other way? > > With sendBroadcast(Intent intent) from the Context - class? > > I feel like if I could just send Intents back and forth it would make > > things easier.. > > > Or am I under a wrong impression here? > > > Any comments appreciated! > > -- > Dianne Hackborn > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support. All such questions should be posted on public > forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
