Can I rely on Timer and TimerTask to work properly on Android? I have a background Service with a single Timer, and I schedule (possibly multiple) TimerTask's via Timer.schedule()
At the beginning of each implemented TimerTask.run() method, I check the TimerTask.scheduledExecutionTime() and compare it with the current time. Sometimes things are fine, and the difference is a small number of ms. But sometimes things are nowhere near fine, and the invocation of my TimerTask is *way* late -- like multiple hours late. Can an Android phone go into some deep sleep mode when it doesn't think anything is going on that would cause a TimerTask to be so late? Can I not reliably use TimerTask for scheduling events, and should I be using some Android-specific means (e.g. the AlarmManager, or a Handler) instead? I've searched around a bit, and while I can find numerous posts suggesting Android-specific timing mechanisms, I have not found anything that says that java.util.TimerTask shouldn't be sufficient, the Android docs include no kinds of qualifiers, and this post (from Mark Murphy, who's written several good Android books) specifically mentions it as being available: http://groups.google.com/group/android-developers/browse_thread/thread/42effa0b2deb1b49/74c79d801be765ad?lnk=gst&q=TimerTask# Thanks for any help anyone may be able to provide. - Rich
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