Question

我正在使用apiV2在Google地图中显示一个带精度光盘的圆圈和一个以圆圈为中心的标记。

onLocationChanged我正在删除现有的圈子/标记。 onMapReady我正在绘制新的圆圈/标记。

我试图在＃34;之后画出Marker＆＃34;代码中的圆圈。我试着在标记上调用.showInfoWindow（），但即便如此，它仍然显示在圆圈后面。

这是我的代码（显然没有完成）：

    public void onLocationChanged(Location location) {

    newLatLng = new LatLng(location.getLatitude(), location.getLongitude());

    //Circle management
    if (myLocationCircle != null) {
        myLocationCircle.remove();
    }
    circleOptions = new CircleOptions()
            .center(newLatLng)
            .radius(location.getAccuracy())
            .strokeWidth(2)
            .strokeColor(Color.BLUE)
            .fillColor(Color.parseColor("#500084d3")); //Format are: #RRGGBB #AARRGGBB, where #AA is the transparency

    //Marker management
    if (myLocationMarker != null) {
        myLocationMarker.remove();
    }
    markerOptions = new MarkerOptions()
            .position(newLatLng)
            .title("Hey, that's my position!");

    onMapReady(mGoogleMap);
}


@Override
public void onMapReady(GoogleMap myGoogleMap) {

    if (myGoogleMap == null) {
        Toast.makeText(this.getApplicationContext(),"Sorry! Unable to initialize the map", Toast.LENGTH_LONG).show();
    }

    else {

        mGoogleMap = myGoogleMap;

        myGoogleMap.setMyLocationEnabled(true);
        myGoogleMap.getUiSettings().setZoomControlsEnabled(true);
        myGoogleMap.getUiSettings().setAllGesturesEnabled(true);
        myGoogleMap.getUiSettings().setCompassEnabled(true);
        myGoogleMap.getUiSettings().setMapToolbarEnabled(true);
        myGoogleMap.setMyLocationEnabled(true);
        myCurrentCameraPosition = myGoogleMap.getCameraPosition();

        if ( newLatLng != null ) {

            CameraPosition myNewCameraPosition = new CameraPosition(newLatLng, 15, myCurrentCameraPosition.tilt, myCurrentCameraPosition.bearing);
            myGoogleMap.animateCamera(CameraUpdateFactory.newCameraPosition(myNewCameraPosition));

            if (circleOptions!=null){
                //Draw blue circle around your position (setup of options done in onLocationChange())
                myLocationCircle = myGoogleMap.addCircle(circleOptions);
            }

            if (markerOptions != null) {
                //Draw a marker at your position (setup of options done in onLocationChange())
                myLocationMarker = mGoogleMap.addMarker(markerOptions);
                myLocationMarker.showInfoWindow();
            }
        }
    }
}

Answer 1

请查看此代码，该代码演示绘图标记和圆圈以及更新其位置。

private Circle mCircle;
private Marker mMarker;
private GoogleMap mGoogleMap;

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

    mGoogleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.mapFragment)).getMap();
    mGoogleMap.setMyLocationEnabled(true);
    mGoogleMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
        @Override
        public void onMyLocationChange(Location location) {
            LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
            if(mCircle == null || mMarker == null){
                drawMarkerWithCircle(latLng);
            }else{
                updateMarkerWithCircle(latLng);
            }
        }
    });
}

private void updateMarkerWithCircle(LatLng position) {
    mCircle.setCenter(position);
    mMarker.setPosition(position);
}

private void drawMarkerWithCircle(LatLng position){
    double radiusInMeters = 100.0;
    int strokeColor = 0xffff0000; //red outline
    int shadeColor = 0x44ff0000; //opaque red fill

    CircleOptions circleOptions = new CircleOptions().center(position).radius(radiusInMeters).fillColor(shadeColor).strokeColor(strokeColor).strokeWidth(8);
    mCircle = mGoogleMap.addCircle(circleOptions);

    MarkerOptions markerOptions = new MarkerOptions().position(position);
    mMarker = mGoogleMap.addMarker(markerOptions);
}

如何在Circle上方绘制MapsV2标记？

1 个答案: