For the record, rebooting with a momentary battery removal restored the sensor data acquisition rate to the previous rate. (In other words, I thankfully do not have to revert back to a prior OS version in order to acquire sensor data at the rate my application requires.)
On Monday, April 9, 2012 2:31:35 PM UTC-4, greg wrote: > > Last year, I slightly modified the SDK's samples/ApiDemos/OS/Sensors.java > code to log the acquired sensor data to the Nexus S internal SD card in CSV > format. Last week, after updating the Nexus S from OS 2.3.3 to 4.0.4, the > number of logged samples per second plummeted from about 50 samples per > second (accelerometer, magnetometer, and gyroscope) to between 5 to 8 > samples per second. In addition, the application's real time display of > data is no longer smooth and continuous but now has lags of several > seconds. Also, the TextToSpeech voice saying "starting" that I added to the > beginning of my modified sample application now has about a dozen audible > gaps in the output of that one word (e.g., > "s...s...st...t...ah...ar...rr...rrt..tti...in....ing"). Given that the > unmodified ApiDemos/OS/Sensors.java runs smoothly on OS 4.0.4, I suspect > the decrease in sampling speed is related to some change in the OS's > efficiency of writing to the SD card. > > Has anyone else noticed problems related to SD card write speed after > updating to OS 4.0.4 (Ice Cream Sandwich)? If I don't hear from anyone, > I'll try to isolate the problem with a simpler application and file a bug > report. > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
