Android: sensors

Question

Can someone 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 of these things? What will the user feel using all of this?

Answer 1

int SENSOR_DELAY_FASTEST get sensor data as quickly as possible int SENSOR_DELAY_GAME rate suitable for games int SENSOR_DELAY_NORMAL rate (default) suitable for changing the screen orientation int SENSOR_DELAY_UI course suitable for the user interface

Answer 2

Below are some approximations based on verified 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 speed, for example 100 ms.

int READINGRATE = 100000% of the time in us mSensorManager.registerListener (this, mLinearAccelerometer, READINGRATE);

However, speed is just an approximation, if you need accurate speed, it is better to use a timer.

Answer 3

read it
http://developer.android.com/guide/topics/sensors/sensors_overview.html

SENSOR_DELAY_FASTEST 0 microseconds
SENSOR_DELAY_GAME 20,000 microseconds
SENSOR_DELAY_UI 60,000 microseconds
SENSOR_DELAY_NORMAL 200,000 microseconds (200 milliseconds)

Answer 4

My results with devices:
Honor 4C Android 5.1.1
Xperia Z3 Android 6.0.1
for Sensor.TYPE_ACCELEROMETER

 Approximate values: For samplingPeriodUs: 0ms: Honor: 4-12ms, long time(1min) 10ms Xperia: 1-5ms, long time(1min) 3ms For samplingPeriodUs: 30ms: Honor: 4-12ms, long time(1min) 7ms Xperia: 7-21ms, long time(1min) 20ms For samplingPeriodUs: SensorManager.SENSOR_DELAY_NORMAL: Many tests from internet: Accelerometer, SENSOR_DELAY_NORMAL: 215-230 ms Honor: 4-11ms, long time(1min) 10ms Xperia: 6-114ms, long time(1min) 14ms Omitted:SENSOR_DELAY_GAME, SENSOR_DELAY_UI For samplingPeriodUs: SensorManager.SENSOR_DELAY_FASTEST: Many tests from internet: Accelerometer, SENSOR_DELAY_FASTEST: 18-20 ms Honor: 3-12ms, long time(1min) 8ms Xperia: 1-5ms, long time(1min) 5ms