public class MainActivity extends AppCompatActivity {

  private ProximityManager proximityManager;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    KontaktSDK.initialize("YOUR_API_KEY");

    proximityManager = ProximityManagerFactory.create(this);
    proximityManager.setIBeaconListener(createIBeaconListener());
    proximityManager.setEddystoneListener(createEddystoneListener());
  }

  @Override
  protected void onStart() {
    super.onStart();
    startScanning();
  }

  @Override
  protected void onStop() {
    proximityManager.stopScanning();
    super.onStop();
  }

  @Override
  protected void onDestroy() {
    proximityManager.disconnect();
    proximityManager = null;
    super.onDestroy();
  }

  private void startScanning() {
    proximityManager.connect(new OnServiceReadyListener() {
      @Override
      public void onServiceReady() {
        proximityManager.startScanning();
      }
    });
  }

  private IBeaconListener createIBeaconListener() {
    return new SimpleIBeaconListener() {
      @Override
      public void onIBeaconDiscovered(IBeaconDevice ibeacon, IBeaconRegion region) {
        Log.i("Sample", "IBeacon discovered: " + ibeacon.toString());
      }
    };
  }

  private EddystoneListener createEddystoneListener() {
    return new SimpleEddystoneListener() {
      @Override
      public void onEddystoneDiscovered(IEddystoneDevice eddystone, IEddystoneNamespace namespace) {
        Log.i("Sample", "Eddystone discovered: " + eddystone.toString());
      }
    };
  }
}