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androidserviceaccelerometerwear-os

Accelerometer sensor cause losses running into a service

I am developing an application for Android Wear. It listens coordinates from an accelerometer sensor and finds a pattern.

To do this, when the user clicks a button, the service starts and begins to store coordinates in a List. Usually, the accelerometer sensor logs 4 to 5 coordinates per second.

The problem is sometimes the onSensorChanged() method does not receive data during several seconds causing losses of data and trouble to find a pattern.

Here is a gist of my service: https://gist.github.com/cpalosrejano/8f0e59e47124275136fc3d5d941faa07

Things I've tried:

  • I am using android:stopWithTask=false to prevent the service to stop when the activity dies.
  • I have also used a WakeLock to prevent the device go to sleep while the services are recording coordinates.

What am I doing wrong? Is there another way to receive callbacks from the accelerometer sensor without causing data loss?

Thanks in advance.

Solution

  • Its a bit late, but finnaly I found the solution.

    I start the service in foreground, with method startForeground(int, Notification) so the service never wont stop. With this fix, you will never lost any SensorEvent.