Activity with ProgressBar -> Service -> AsyncTask for downloading - but how to update the progress?

Question

Hi,

this is the current state/situation: I have an Activity which binds a Service which creates AsyncTasks which downloads various web resources. That works well, but of course the ProgressBar shows nothing.

Previously i had an Activity which created an AsyncTask which downloaded some stuff. The AsyncTask got the View which holds the ProgressBar. So i could update the progress using onProgressUpdate and publishProgress. Obviously this doesn't work any longer because I have no reference to the ProgressBar.

So, do you have any idea on how to update the progress?

Thanks in advance.

Answer 1

Have the Service notify the then-running Activity about the progress from onProgressUpdate(). That could be via a broadcast Intent, or via a callback object registered by the Activity (and unregistered when the Activity is destroyed, such as on a screen rotation).