Hello, thanks for the reply.
Yes, that was actually the first thing I've tried.
Log shows that callback methods of listener are called with right
progress values.
But code that sets ProgressBar value and text of TextView within this
method does not cause screen redraw.
Also I've tried to explicitly call invalidate() on views which need to
be updated with no luck.
There are people with the same problem on the internet (several
threads on stackoverflow etc) but the only valuable advices are
related to usage of broadcast reciever and interacting with activity
from service through intents.
So that is why I wonder are there workable alternatives to that approach?
I register listener as anonymous class within custom adapter:
public View getView(int position, View contentView, ViewGroup parent) {
Object item = mDownloads.get(position);
LayoutInflater li = (LayoutInflater)
mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (contentView == null) contentView =
li.inflate(R.layout.active_download_row, null);
tvDownloadSize = (TextView)
contentView.findViewById(R.id.tvSize);
pbDownloadProgress = (ProgressBar)
contentView.findViewById(R.id.pbProgress);
mDownloadService.registerDownloadMonitor(d, new IDownloadMonitor() {
public void onStop(Integer...
progresses) {
pbDownloadProgress.setProgress(progresses[0]);
tvDownloadSize.setText("0 kb");
}
public void onStart() {}
public void onProgress(final
Integer... progresses) {
((Activity)
mContext).runOnUiThread(new Runnable() {
public void
run() {
Log.d("DOWN", "IDownloadMonitor::onProgress
Activity::runOnUiThread Runnable::run " + Thread.currentThread());
pbDownloadProgress.setProgress(progresses[0]);
pbDownloadProgress.postInvalidate();
tvDownloadSize.setText(progresses[0].toString() + " kb");
}
});
Log.d(mContext.getPackageName(), "Download id " + d.getID() + "
progress is " + progresses[0]);
}
public void onFinish(File
result) {
notifyDataSetChanged();
}
public Object getMonitorTag() {
return
mContext.getPackageName();
}
});
return contentView;
}
And here is snip of logcat:
D/DOWN ( 226): DownloadTask::doInBackground Thread[AsyncTask #1,5,main]
D/DOWN ( 226): DownloadTask::onProgress Thread[ActivityThread,5,main]
D/DOWN ( 226): IDownloadMonitor::onProgress Activity::runOnUiThread
Runnable::run Thread[ActivityThread,5,main]
D/com.play.downloader( 226): Download id 24 progress is 2
D/DOWN ( 226): DownloadTask::onProgress Thread[ActivityThread,5,main]
D/DOWN ( 226): IDownloadMonitor::onProgress Activity::runOnUiThread
Runnable::run Thread[ActivityThread,5,main]
D/com.play.downloader( 226): Download id 24 progress is 4
D/DOWN ( 226): DownloadTask::onProgress Thread[ActivityThread,5,main]
That ActivityThread is actually main and was intentionally renamed by
me with Thread.currentThread().setName("ActivityThread"); from within
onCreate() of Activity whose controls I'm trying to update so that to
see whether methods really run on the main thread.
2011/6/22 Kumar Bibek <[email protected]>:
> Have you tried logging your listener calls? See if those are actually
> being called.
>
>
> On Jun 19, 4:46 am, "Vadim S. Khondar" <[email protected]>
> wrote:
>> Hello to everyone.
>>
>> I have an application with service doing background work by
>> instantiating AsyncTasks and activity displaying progress of that
>> work.
>>
>> As soon as updates are expected to be quite often I preferred to make
>> connection between service and activity through listener rather than
>> via broadcast intents/receiver.
>> General lifecycle of application as intended by design I've tried is
>> the following:
>> Activity starts -> binds to service in onCreate -> registers listener
>> to the particular AsyncTask within service after bind succedes ->
>> receives updates -> unregisters listener in onPause -> unbinds in
>> onDestroy
>> This works fine (log shows it works as expected) but I've got a
>> problem with updating UI in activity.
>>
>> I understand that activity UI updates must be performed on UI-thread.
>> And that I've checked first and it seem to be ok, as soon as code with
>> updates within listener runs on main thread just like activity's on*()
>> methods. To ensure this I've also tried to wrap code in listener with
>> posting runnable to runOnUiThread() of my activity. That also gives
>> nothing (UI updates happen in one instance of emulator and do not
>> happen in another and also on real device, however screen is updated
>> if I scroll contents down and back).
>>
>> So the question is whether described scenario is possible on Android
>> or should I just use broadcast receiver as the only way to accomplish
>> my goal?
>>
>> Thanks in advance.
>
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Best regards,
Vadim
God, grant me the serenity to accept the things I cannot change,
courage to change the things I can,
and wisdom always to tell the difference.
Rainhold Niebuhr
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