I encountered the same problem with a Samsung S4.
On Wednesday, October 2, 2013 8:41:01 AM UTC-5, String wrote: > > I've been getting error reports from users of the Note 3 that boil down to > the following: > > > *java.lang.IllegalArgumentException: R array length must be 3 or 4* > > *at > android.hardware.SensorManager.getRotationMatrixFromVector(SensorManager.java:1336)* > > > This function, *getRotationMatrixFromVector()*, is documented as a > "Helper function to convert a rotation vector to a rotation matrix. Given a > rotation vector (presumably from a ROTATION_VECTOR sensor)". My typical > call to this function looks like this: > > > *SensorManager.getRotationMatrixFromVector(R, rotationVector);* > > > Where the *rotationVector *comes from the hardware accelerometer and > gyroscope, and (despite the error message about *R*) it's with this > parameter where the problem lies. It's directly passed from > *android.hardware.SensorEventListener.onSensorChanged(SensorEvent > event)* for a *Sensor.TYPE_ROTATION_VECTOR* event. The *event *parameter > there has a *values *property that is passed as the *rotationVector *in > the previous call. And according to the docs at > > http://developer.android.com/reference/android/hardware/SensorEvent.html#values, > > this array can legitimately have up to 5 elements - moreover, in Android > 4.3, it *should *have all 5. However, passing an array of length 5 causes > the Note 3 to crash on the aforementioned *IllegalArgumentException*; it > seems to expect 4 elements at most. > > > So, here's the summary: Android 4.3 passes an array with 5 elements to > this hardware event, and the Note 3 throws an exception when passed that > same array to the system-defined helper function for that event. This > behavior does not happen on the other 4.3 devices I have at hand (Galaxy > Nexus and Nexus 7); it appears to be a basic flaw in the Samsung > implementation of 4.3. > > > And I know, this all looks like minutiae of a hyper-specific issue - but > believe me, it's likely to be encountered by any app using the device's > motion sensors. A Google search for *getRotationMatrixFromVector *returns > 51,400 results. > > Any comment from Samsung on this would be most welcome, if unlikely. > > > String > > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
