> I am setting an alarm like thus:
>
> AlarmManager mgr = (AlarmManager)
> activity.getSystemService(Context.ALARM_SERVICE);
> mgr.setRepeating( AlarmManager.RTC_WAKEUP, msecs, INTERVAL_MSECS,
> pendingIntent );
>
> to go off at 3am in the morning.
>
> the alarm gets caught by a broadcast receiver. in the onReceive
> method of the broadcast receiver, I am acquiring a wakelock and
> starting a service.
>
> @Override
> public void onReceive(Context context, Intent intent) {
> PowerManager mgr = (PowerManager)
> context.getSystemService(Context.POWER_SERVICE);
> lock = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
> WAKELOCK_NAME);
> ...
> context.startService(new Intent(context, MyService.class));
Depending on where 'lock' is defined and when you're releasing the lock,
that may not work.
> in my service I am trying to start my app --
> @Override
> public void onStart(Intent intent, final int startId) {
> super.onStart(intent, startId);
> Intent intentStartMyActivity = new Intent(Intent.ACTION_MAIN);
> intentStartMyActivity.putExtra("com.test.main", true);
> startActivity( intentStartMyActivity );
Why not just start the activity from the BroadcastReceiver? What's the
point of the service?
And I really hope that this is either an alarm clock app or you make this
configurable, as users may not appreciate an activity spontaneously
starting up triggered by some background operation.
> I have some additional logging my start activity and discovered that
> sometimes this works and sometimes it doesn't. It will work like 4
> nights in a row and then on the 5th night, it won't work, and then it
> will work three more times after that. Any ideas on why it might
> 'sometimes' not work?
WakeLocks are tricky beasts. I spend a few pages in a book trying to
explain how to handle this pattern well. I can't tell whether your code is
OK, because it's missing some key pieces, like where 'lock' is declared
and when you're releasing the WakeLock.
I have the pattern wrapped up in a reusable component, though it is very
much not designed for use with an activity:
http://github.com/commonsguy/cwac-wakeful
You could take a peek at the code (it's not that big) and example to see
how to apply it in your app.
--
Mark Murphy (a Commons Guy)
http://commonsware.com
Android App Developer Books: http://commonsware.com/books.html
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