Question About ShakeDetector Code

Hello, I have a quick question about the ShakeDetector.java file from "Shaking Things Up", when I placed the file in my com.example package in the src folder, two errors instantly showed up for lines 42, and 84. The code on 42 is "public void onSensorChanged(SensorEvent event)" and the code on 84 is "public void onAccuracyChanged(Sensor sensor, int accuracy)", the error for line 42 is "The method onSensorChanged(SensorEvent) of type ShakeDetector must override a superclass method"
and the error for 84 is "The method onAccuracyChanged(Sensor, int) of type ShakeDetector must override a superclass method" and when I went to quick fix them, the only quick fix is to remove the Override annotation, I tried removing the Override annotation to see if it would fix it and the errors are still there, I'm not sure if it will help but on the little icon on the left side of 42 also says "implements android.hardware.SensorEventListener.onSensorChanged" and "implements android.hardware.SensorEventListener.onAccuracyChanged" on line 84, so if anyone could help me out with this issue I would greatly appreciate it :)