How hard is it to customize how the phone app responds to the g-sensor response?

Question

Android

Good afternoon,
here is the task.
We have an Android app.
It is necessary that the application takes g-sensor indicators and, with a certain change in the acceleration of the phone (for example, an accident), it gives out some kind of signal. If I understand correctly, we need to compare X, Y, Z values ​​over time and create some kind of application reaction to changes in these parameters above certain values.
How difficult is this task?
What parts will it consist of?
Thanks for answers)

Answer 1

some reaction

when you specify this, then you can talk about something.
In general - just according to the current description - nothing complicated. But without TK - the result of HZ, and TK does not smell here.

Answer 2

To understand what readings will be on the sensors at the time of the accident, many tests are needed. Based on the test results, create "vector accident profiles". Then write an application that starts a service that polls the sensor at least 3 times per second, and builds a vector profile of the last minute (accident activity mostly ends within a minute).
Thus, having a kind of "fingerprint" of accidents - a profile of changes in accelerations - one can recognize an accident. The downside is that if the phone is thrown against the wall, it can also be considered an accident.