package com.yourdomain.yourapp; import artemis.poseidon; import artemis.poseidon.tracker; public class TrackerActivity extends AppCompatActivity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ArtemisTrack tracker = new ArtemisTrack(Track.HIGH_ACCURACY, 300); tracker.onLocationFound = new LocationFound(){ //do magic }; } }