sensor refresh rate, limited on Android 12, 与安全问题有什么关系？

Question

To protect potentially sensitive information about users, if your app targets Android 12 (API level 31) or higher, the system places a limit on the refresh rate of data from certain motion sensors and position sensors. This data includes values recorded by the device's accelerometer, gyroscope, and geomagnetic field sensor.

The refresh rate limit depends on how you access sensor data:

If you call the registerListener() method to monitor sensor events, the sensor sampling rate is limited to 200 Hz. This is true for all overloaded variants of the registerListener() method.
If you use the SensorDirectChannel class, the sensor sampling rate is limited to RATE_NORMAL, which is usually about 50 Hz.
If your app needs to gather motion sensor data at a higher rate, you must declare the HIGH_SAMPLING_RATE_SENSORS permission, as shown in the following code snippet. Otherwise, if your app tries to gather motion sensor data at a higher rate without declaring this permission, a SecurityException occurs.

Ref here

Answer 1

If you can detect small accelerations at a high enough rate, you can infer a user's keystrokes. For example, see this