by Bernhard Kolter » Sat, 14 Mar 2009 02:12:12 GMT

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1. What does "Battery Usage" Mean?

I have an application that runs a background service.  This background
service wakes and runs once every 2 seconds.  The background service
registers as a listener with the orientation sensor with the lowest
possible rate of event delivery (application).  When my service thread
wakes it uses the latest value delivered by the sensor events, so
there is no heavy-weight processing being done on the sensor thread.
Furthermore, the background thread is doing very light processing when
it wakes.

I've done tests that show that my background thread poses very minor
power overhead, somewhere around 3%.  The test was basically:  charge
to 100%, leave phone on for two hours with service running, record
battery level.  Repeat with service off and compare.

However "Battery Usage" of my application is listed as some insanely
high value  (e.g., 40%).  Over the same two hour period of the test,
CPU usage was less than 3 seconds.

What does "battery usage" mean?  In my case, it clearly isn't an
indication of "battery drain", but that is what the stat seems to

2. Double-Permissions when publishing to Android Market?

It's a bug :) and the permissions will be appear correctly on the phone.

On Tue, Oct 6, 2009 at 3:48 AM, Alexander Kazanin <


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