Interface MapProvider

public interface MapProvider

The service-provider interface a native map backend implements so the core NativeMap component can drive it without knowing which provider (Apple MapKit, Google Maps, Bing, Huawei, ...) is in use.

This is a plain interface, deliberately not a com.codename1.system.NativeInterface: core neither ships nor references any concrete implementation. When the developer selects a provider with the maps.provider build hint, the build pushes a provider implementation (carrying the platform-native methods) into the com.codename1.maps package of the app and weaves in a call to MapProviderRegistry.register(MapProvider). Absent that injection the registry stays empty and NativeMap falls back to the pure-vector MapView.

Every method is keyed by a mapId so a single provider implementation can serve multiple NativeMap instances. Coordinate conversion uses a stateful "calculate then read" idiom (calcScreenPosition(int, double, double) then getScreenX(int) / getScreenY(int)) to avoid returning multiple values across the native boundary. Native code reports user interaction back through the static callbacks on NativeMap (fireTap, fireLongPress, fireMarkerClick, fireCameraChange, fireMapReady).

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final int
    MAP_TYPE_HYBRID
    Map type: hybrid imagery with labels.
    static final int
    MAP_TYPE_SATELLITE
    Map type: satellite imagery.
    static final int
    MAP_TYPE_STANDARD
    Map type: standard street map.
    static final int
    MAP_TYPE_TERRAIN
    Map type: terrain relief.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    addCircle(int mapId, double lat, double lon, double radiusMeters, int fillColor, int strokeColor, int strokeWidth)
    Adds a geodesic circle and returns its element key.
    long
    addMarker(int mapId, byte[] icon, double lat, double lon, String title, String snippet, float anchorU, float anchorV)
    Adds a marker.
    void
    addToPath(int mapId, long pathId, double lat, double lon)
     
    long
    beginPath(int mapId)
    Starts accumulating a path; feed it with addToPath(int, long, double, double).
    void
    calcLatLongPosition(int mapId, int x, int y)
     
    void
    calcScreenPosition(int mapId, double lat, double lon)
     
    PeerComponent
    createPeer(NativeMap host, int mapId)
    Creates the native peer view for the map identified by mapId and returns it wrapped as a Codename One PeerComponent.
    void
    deinitialize(int mapId)
    Releases native resources for mapId when the map is no longer used.
    long
    finishPolygon(int mapId, long pathId, int fillColor, int strokeColor, int strokeWidth)
    Finishes the path as a filled polygon and returns its element key.
    long
    finishPolyline(int mapId, long pathId, int strokeColor, int strokeWidth)
    Finishes the path as a stroked polyline and returns its element key.
    String
    getId()
    A stable identifier for this provider, e.g.
    double
    getLatitude(int mapId)
     
    double
    getLongitude(int mapId)
     
    float
    getMaxZoom(int mapId)
     
    float
    getMinZoom(int mapId)
     
    double
    getScreenLat(int mapId)
     
    double
    getScreenLon(int mapId)
     
    int
    getScreenX(int mapId)
     
    int
    getScreenY(int mapId)
     
    float
    getZoom(int mapId)
     
    boolean
    isAvailable()
    Whether this provider can render on the current device right now (e.g. Google checks that Play Services is present).
    void
    removeAllElements(int mapId)
     
    void
    removeElement(int mapId, long elementId)
     
    void
    setCamera(int mapId, double lat, double lon, float zoom, float bearing, float tilt)
    Moves the camera.
    void
    setMapType(int mapId, int type)
     
    void
    setRotateGestureEnabled(int mapId, boolean enabled)
     
    void
    setShowMyLocation(int mapId, boolean show)
     

  • Field Details

    • MAP_TYPE_STANDARD

      static final int MAP_TYPE_STANDARD
      Map type: standard street map.
      See Also:

    • MAP_TYPE_SATELLITE

      static final int MAP_TYPE_SATELLITE
      Map type: satellite imagery.
      See Also:

    • MAP_TYPE_HYBRID

      static final int MAP_TYPE_HYBRID
      Map type: hybrid imagery with labels.
      See Also:

    • MAP_TYPE_TERRAIN

      static final int MAP_TYPE_TERRAIN
      Map type: terrain relief.
      See Also:

  • Method Details

    • getId

      String getId()
      A stable identifier for this provider, e.g. "apple" or "google".

    • isAvailable

      boolean isAvailable()
      Whether this provider can render on the current device right now (e.g. Google checks that Play Services is present). When this returns false NativeMap falls back to the vector engine.

    • createPeer

      PeerComponent createPeer(NativeMap host, int mapId)
      Creates the native peer view for the map identified by mapId and returns it wrapped as a Codename One PeerComponent. Returning null triggers the vector fallback.

    • deinitialize

      void deinitialize(int mapId)
      Releases native resources for mapId when the map is no longer used.

    • setCamera

      void setCamera(int mapId, double lat, double lon, float zoom, float bearing, float tilt)
      Moves the camera. bearing and tilt are in degrees; providers that do not support them ignore those arguments.

    • getLatitude

      double getLatitude(int mapId)

    • getLongitude

      double getLongitude(int mapId)

    • getZoom

      float getZoom(int mapId)

    • getMaxZoom

      float getMaxZoom(int mapId)

    • getMinZoom

      float getMinZoom(int mapId)

    • addMarker

      long addMarker(int mapId, byte[] icon, double lat, double lon, String title, String snippet, float anchorU, float anchorV)
      Adds a marker. icon is PNG bytes (or null for the default pin); returns an opaque element key. anchorU/anchorV are normalized.

    • beginPath

      long beginPath(int mapId)
      Starts accumulating a path; feed it with addToPath(int, long, double, double).

    • addToPath

      void addToPath(int mapId, long pathId, double lat, double lon)

    • finishPolyline

      long finishPolyline(int mapId, long pathId, int strokeColor, int strokeWidth)
      Finishes the path as a stroked polyline and returns its element key.

    • finishPolygon

      long finishPolygon(int mapId, long pathId, int fillColor, int strokeColor, int strokeWidth)
      Finishes the path as a filled polygon and returns its element key.

    • addCircle

      long addCircle(int mapId, double lat, double lon, double radiusMeters, int fillColor, int strokeColor, int strokeWidth)
      Adds a geodesic circle and returns its element key.

    • removeElement

      void removeElement(int mapId, long elementId)

    • removeAllElements

      void removeAllElements(int mapId)

    • calcScreenPosition

      void calcScreenPosition(int mapId, double lat, double lon)

    • getScreenX

      int getScreenX(int mapId)

    • getScreenY

      int getScreenY(int mapId)

    • calcLatLongPosition

      void calcLatLongPosition(int mapId, int x, int y)

    • getScreenLat

      double getScreenLat(int mapId)

    • getScreenLon

      double getScreenLon(int mapId)

    • setShowMyLocation

      void setShowMyLocation(int mapId, boolean show)

    • setRotateGestureEnabled

      void setRotateGestureEnabled(int mapId, boolean enabled)

    • setMapType

      void setMapType(int mapId, int type)