Hi again,
sorry to spam. I just found the following note in
http://developer.android.com/reference/android/hardware/SensorEventListener.html#onSensorChanged(android.hardware.SensorEvent)
NOTE: The application doesn't own the event object passed as a
parameter and therefore cannot hold on o it. The object may be part of
an internal pool and may be reused by the framework.
I don't know how I missed that, which explains the problem.
Thanks again for your help.
Regards,
Markus
On Oct 28, 10:38 pm, josean1968 <josean1...@gmail.com> wrote:
> Hello,
>
> You have this:
>
> ...
> private SensorEvent lastEvent;
> ...
>
> @Override
> public void onSensorChanged(SensorEvent event) {
> if (lastEvent == null) {
> lastEvent = event;
> return;
> }
>
> Log.v(TAG, "dT [" + Thread.currentThread().getName() + "]: " +
> (event.timestamp - lastEvent.timestamp));
> }
>
> ----------------
>
> The problem is that the "onSensorChanged()" method can be invoked
> concurrently because it is an event listener.
> Declare a local variable and copy the value (not just a pointer to the
> object):
>
> @Override
> public void onSensorChanged(SensorEvent event) {
> ...
> int lastTimestamp = event.timestamp;
> ...
> }
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