Android问题----Android OnSensorChanged() not working when screen lock is on

Some of the Android OS versions have a bug which stops the sensors such as the accelerometer recording when the screen lock is on.

The bug has been submitted but has not been fixed in all instances

http://code.google.com/p/android/issues/detail?id=3708

http://code.google.com/p/android/issues/detail?id=11028

Below is a list of Phones and OS versions the do and don’t have the bug + some are reported to be intermittent.

BugNo BugIntermittentMotorola Milestone 2.1Google Nexus One 2.2Google Nexus One 2.2Nexus One 2.1T-Mobile G1 1.6HTC Desire 2.2Google ION 1.6HTC EVO 4G 2.2 Motorola Droid 2.2 HTC Eris 2.2 Droid Incredible 2.2 HTC Legend 2.1HTC Wildfire 2.2

Update: There are a couple of workarounds that i have found

The first works for all phones but is a drain on the battery and involves keeping the screen on all the time. It changes the timeout of the screen to a higher number:

http://stackoverflow.com/questions/1114270/android-screen-timeout

The second seems to only work on some phones such as the Milestone and Droid which registers the sensor, then un-registers the sensor when the screen is off and re-registers the sensor. Long winded but if it works…

http://stackoverflow.com/questions/2143102/accelerometer-stops-delivering-samples-when-the-screen-is-off-on-droid-nexus-one

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