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Can anybody tell me what is the difference between SENSOR_DELAY_NORMAL, SENSOR_DELAY_GAME, SENSOR_DELAY_UI and SENSOR_DELAY_FASTEST in Android sensors.
Where should a developer use all these things? What will user feel by using all these?
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SensorManager lets you access the device's sensors . Always make sure to disable sensors you don't need, especially when your activity is paused. Failing to do so can drain the battery in just a few hours.
Body Sensors: Allows access to your health data from heart-rate monitors, fitness trackers, and other external sensors. The good: Fitness apps need this permission to provide health tips, monitor your heart rate while you exercise, and so on.
Here are some approximations based on tested results:
Accelerometer, SENSOR_DELAY_FASTEST: 18-20 ms Accelerometer, SENSOR_DELAY_GAME: 37-39 ms Accelerometer, SENSOR_DELAY_UI: 85-87 ms Accelerometer, SENSOR_DELAY_NORMAL: 215-230 ms Orientation Sensor, SENSOR_DELAY_FASTEST: 16-17 ms Orientation Sensor, SENSOR_DELAY_GAME: 37-39 ms Orientation Sensor, SENSOR_DELAY_UI: 77 ms Orientation Sensor, SENSOR_DELAY_NORMAL: 224-225 ms
You can also define your own rate, for example 100ms.
int READINGRATE = 100000; // time in us
mSensorManager.registerListener(this, mLinearAccelerometer, READINGRATE);
However the rate is just an approximation, if you need an accurate rate it is better to use a timer.
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read this
http://developer.android.com/guide/topics/sensors/sensors_overview.html
SENSOR_DELAY_FASTEST 0 microsecond
SENSOR_DELAY_GAME 20,000 microsecond
SENSOR_DELAY_UI 60,000 microsecond
SENSOR_DELAY_NORMAL 200,000 microseconds(200 milliseconds)
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