Klik marker untuk masuk ke activity dengan membawa parameter

AcitvityUtama.java

/*
skema: susun marker (indexing) (1*) > klik marker > munculin infowindow/snip (2)> klik infowindow (3)> masuk ke activity (4)
*/

@Override
public void onMapReady(GoogleMap googleMap) {
    mMap = googleMap;

    mMap.setMyLocationEnabled(true);
}
//....
// (1) buat marker dan indexing masing-masing marker
LatLngBounds.Builder builder = new LatLngBounds.Builder();
  for(int i = 0 ; i < items.size() ; i++) {
      Marker marker = createMarker(
              i,
              items.get(i).getLat(),
              items.get(i).getLot(),
              items.get(i).getJudul(),
              items.get(i).getDeskripsi()
      );
      builder.include(marker.getPosition());
  }
  LatLngBounds bounds = builder.build();
  // ini membuat marker marker tadi center (bound) di layar
  int width = getResources().getDisplayMetrics().widthPixels;
  int height = getResources().getDisplayMetrics().heightPixels;
  int padding = (int) (width * 0.25); // offset from edges of the map 25% of screen
  cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, padding);
                      mMap.animateCamera(cu);

private Marker createMarker(int index, String lat_tujuan, String lot_tujuan, String judul, String deskripsi) {

    Marker marker = null;

    marker = mMap.addMarker(new MarkerOptions()
            .position(new LatLng(Double.valueOf(lat_tujuan),Double.valueOf(lot_tujuan)))
            .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED))
            .title(judul)
            // buat snip
            .snippet(deskripsi)
    );
    String id_marker = marker.getId();
    // pake ini kalau di fragment
    mSettings = getActivity().getSharedPreferences(id_marker, Context.MODE_PRIVATE);
    // pake ini kalau di activity
    //mSettings = getSharedPreferences(id_marker, Context.MODE_PRIVATE);
    editor = mSettings.edit();
    editor.putInt("id", index);
    editor.apply();

    // (2) munculin infowindow/snip yg sudah di buat
    marker.showInfoWindow();
    return marker;
}

// (3) klik infowindow/snip
mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
      @Override
      public void onInfoWindowClick(Marker marker) {
          String id_marker = marker.getId();
          mSettings = getActivity().getSharedPreferences(id_marker, Context.MODE_PRIVATE);
          int i = mSettings.getInt("id", 0);
          // (4) masuk ke activity
          Intent intent = new Intent(getActivity(), DetailActivity.class);
          // bawa parameter kalo emang ada parameter.
          intent.putExtra("key_id", items.get(i).getId());
          // pake ini kalau di fragment
          getActivity().startActivity(intent);
          // pake ini kalau di activity
          // startActivity(intent);

      }
  });