code: public static Intent showLocation(float latitude, float longitude, Integer zoomLevel) {
          Intent intent = new Intent();
          intent.setAction(Intent.ACTION_VIEW);
          String data = String.format("geo:%s,%s", latitude, longitude);
          if (zoomLevel != null) {
              data = String.format("%s?z=%s", data, zoomLevel);
          }
          intent.setData(Uri.parse(data));
          return intent;
      }
docs: Opens the Maps application to the given location.
  
  @param latitude  Latitude
  @param longitude Longitude
  @param zoomLevel A zoom level of 1 shows the whole Earth, centered at the given lat,lng.
  A zoom level of 2 shows a quarter of the Earth, and so on. The highest zoom level is 23.
  A larger zoom level will be clamped to 23.
  @see #findLocation(String)