How to use

startPosition

method

in

org.mapsforge.map.datastore.MapDataStore

/**
 * @return the start point (may be null).
 */
public LatLong getStartPosition() {
  if (this.mapDataStore != null) {
    return this.mapDataStore.startPosition();
  }
  return null;
}

/**
 * adds another mapDataStore
 *
 * @param mapDataStore      the mapDataStore to add
 * @param useStartZoomLevel if true, use the start zoom level of this mapDataStore as the start zoom level
 * @param useStartPosition  if true, use the start position of this mapDataStore as the start position
 */
public void addMapDataStore(MapDataStore mapDataStore, boolean useStartZoomLevel, boolean useStartPosition) {
  if (this.mapDatabases.contains(mapDataStore)) {
    throw new IllegalArgumentException("Duplicate map database");
  }
  this.mapDatabases.add(mapDataStore);
  if (useStartZoomLevel) {
    this.startZoomLevel = mapDataStore.startZoomLevel();
  }
  if (useStartPosition) {
    this.startPosition = mapDataStore.startPosition();
  }
  if (null == this.boundingBox) {
    this.boundingBox = mapDataStore.boundingBox();
  } else {
    this.boundingBox = this.boundingBox.extendBoundingBox(mapDataStore.boundingBox());
  }
}

/**
 * @return the start point (may be null).
 */
public LatLong getStartPosition() {
  if (this.mapDataStore != null) {
    return this.mapDataStore.startPosition();
  }
  return null;
}

/**
 * Extracts the initial position from the map file, falling back onto the value supplied
 * by getDefaultInitialPosition if there is no initial position coded into the map file.
 * You will only need to override this method if you do not want the initial position extracted
 * from the map file.
 *
 * @return the initial position encoded in the map file or a fallback value.
 */
protected MapPosition getInitialPosition() {
  MapDataStore mapFile = getMapFile();
  if (mapFile.startPosition() != null) {
    Byte startZoomLevel = mapFile.startZoomLevel();
    if (startZoomLevel == null) {
      // it is actually possible to have no start zoom level in the file
      startZoomLevel = new Byte((byte) 12);
    }
    return new MapPosition(mapFile.startPosition(), startZoomLevel);
  } else {
    return getDefaultInitialPosition();
  }
}

/**
 * adds another mapDataStore
 *
 * @param mapDataStore      the mapDataStore to add
 * @param useStartZoomLevel if true, use the start zoom level of this mapDataStore as the start zoom level
 * @param useStartPosition  if true, use the start position of this mapDataStore as the start position
 */
public void addMapDataStore(MapDataStore mapDataStore, boolean useStartZoomLevel, boolean useStartPosition) {
  if (this.mapDatabases.contains(mapDataStore)) {
    throw new IllegalArgumentException("Duplicate map database");
  }
  this.mapDatabases.add(mapDataStore);
  if (useStartZoomLevel) {
    this.startZoomLevel = mapDataStore.startZoomLevel();
  }
  if (useStartPosition) {
    this.startPosition = mapDataStore.startPosition();
  }
  if (null == this.boundingBox) {
    this.boundingBox = mapDataStore.boundingBox();
  } else {
    this.boundingBox = this.boundingBox.extendBoundingBox(mapDataStore.boundingBox());
  }
}