Advanced Android: Advanced Android 03.1: Getting sensor data / taks 2/ 2.3 Listen for new sensor data

[Productivix]

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A clear and concise description of what the problem is.
The version has changed and the code does not at all run and puts the rest of the code in bad situation !

it is impossible to do the step :

At the top of the class, modify the class signature to implement the SensorEventListener interface.

public class MainActivity
extends AppCompatActivity implements SensorEventListener {