Hi, You will probably want to use a Service ( with a PARTIAL WAKE LOCK ) rather than an Activity assuming you are not already.
GPS will keep going ok, not sure about TTS in a Service. Regards On Dec 8, 8:41 am, gotok <ken0g...@gmail.com> wrote: > First of all, I am very much a beginner working on my first app, and I > am stuck on a problem. My app uses GPS and TTS and is intended for > use when I am skiing. It has a single screen which displays speed, > odometer, altitude, and GPS coordinates. It also uses TTS to speak > speed, odometer, altitude, and time at user selected intervals. I have > it typically set to speak speed at 5mph intervals. So whenever the > speed crosses 5mph, 10,mph, 15mph, etc either on the way up or down, > the speed is spoken. Similarly, odomenter is spoken every mile, > altitude every 1000ft, and time every quarter hour. It is implemented > as a single activity and built for API level 8. The target device is a > Samsung YP-G70CW MP3 player which runs Froyo 2.2.2. Everything works > as intended when the screen is on. However, the behavior is not > consistent with the screen off (the primary use mode), either by > timeout or directly with the power button. Sometimes the TTS reporting > continues to work fine just as with the screen on. More likely, it > runs at a reduced rate where the odometer and time reports occur on > time, but the speed reports are much less frequent than normal and are > delayed. When the screen goes off, it will get into one of these two > modes and then stay that way. When in the "slow" mode, if I turn the > screen back on, it speeds up to normal. I have diagnostic TTS reports, > "pausing" in the onPause override, and "resuming" in the onResume > override, so I can hear that it pauses when the screen goes off. Now > my many questions: > 1. My app is paused, but it continues to run, either at full or > partial speed. So what does it mean for an app to be paused? Is it > reasonable to implement this kind of app as an activity, or is a > service required? > 2. What all happens when the screen goes off? The Android > documentation notes that one function, Proximity alerts, are slowed > down when the screen is off. Are other GPS functions slowed down also? > 3. I have tried a PARTIAL_WAKE_LOCK acquired in the onCreate override, > and released at the onDestroy override, but it seems to have no > affect. I also added diagnostic TTS such that when I report time I > also check whether the wake lock is held or not. Sometimes it is not > held, so who could be releasing the wake lock? > I would really appreciate any comments/advice to help me solve this > problem. > thanks... -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
