将 InfoWindow 添加到 FastPointOverlay - OsmDroid

Question

最初我使用标记 class 实现了所需的功能，但是当点越来越多时性能会严重下降，所以我将 SimpleFastPointOverlay 与 PopUpwindow 结合使用。

public class OpenMapFragment extends Fragment {
    private Map<Integer, MyPoint> myPointsMap;
    private Context context;
    private PageViewModel pageViewModel;
    private MapView map = null;
    private SimpleFastPointOverlay sfpo;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getParentFragment() != null) {
            pageViewModel = new ViewModelProvider(getParentFragment()).get(PageViewModel.class);
        }
        context = requireActivity().getApplicationContext();

    }

    @Override
    public View onCreateView(
            @NonNull LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View root = inflater.inflate(R.layout.fragment_open_map, container, false);
        LocationManager locationManager = (LocationManager) context.getSystemService(LOCATION_SERVICE);
        Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        map = root.findViewById(R.id.mapview);
        map.setTileSource(TileSourceFactory.MAPNIK);
        map.setMultiTouchControls(true);
        myPointsMap = new HashMap<>();
        pageViewModel.getMyPoints().observe(getViewLifecycleOwner(), myPointsList -> {
           myPointsMap = 
               myPointsList.stream().collect(Collectors.toMap(MyPoint::getId, p -> p));
           if (sfpo != null) {
               map.getOverlays().remove(sfpo);
           }
           sfpo = simpleFastPointOverlayBuilder(myPointsList);
           sfpo.setOnClickListener((points, point) -> {
                MyPoint mp = myPointsMap
                        .get(Integer.valueOf(((LabelledGeoPoint) points.get(point)).getLabel()));

                View popupView = inflater.inflate(R.layout.popup_window, null);
                TextView txtId = popupView.findViewById(R.id.txt_id);
                txtId.setText("id:" + mp.getId());

                int width = LinearLayout.LayoutParams.WRAP_CONTENT;
                int height = LinearLayout.LayoutParams.WRAP_CONTENT;
                final PopupWindow popupWindow = new PopupWindow(popupView, width, height, true);

                popupWindow.showAtLocation(getView(), Gravity.CENTER, 0, 0);

                popupView.setOnTouchListener(new View.OnTouchListener() {
                    @Override
                    public boolean onTouch(View v, MotionEvent event) {
                        popupWindow.dismiss();
                        return true;
                    }
                });
            });
            map.getOverlays().add(sfpo);
        });
        return root;
    }

    private SimpleFastPointOverlay simpleFastPointOverlayBuilder(List<MyPoint> myPointList) {
        List<IGeoPoint> points = new ArrayList<>();

        Paint textStyle = new Paint();
        textStyle.setStyle(Paint.Style.FILL);
        textStyle.setColor(Color.parseColor("#111111"));
        textStyle.setTextAlign(Paint.Align.CENTER);
        textStyle.setTextSize(24);

        Paint pointStyle = new Paint();
        pointStyle.setStyle(Paint.Style.FILL);
        pointStyle.setColor(Color.rgb(255, 0, 0));

        for(MyPoint myPoint: myPointList) {
            points.add(new StyledLabelledGeoPoint(myPoint.getLocationInfo().latitude,
                    myPoint.getLocationInfo().longitude, Integer.toString(myPoint.getId()),
                    pointStyle, textStyle));
        }

        SimplePointTheme pointTheme = new SimplePointTheme(points);

        SimpleFastPointOverlayOptions opt = SimpleFastPointOverlayOptions.getDefaultStyle()
                .setSymbol(SimpleFastPointOverlayOptions.Shape.CIRCLE)
                .setAlgorithm(SimpleFastPointOverlayOptions.RenderingAlgorithm.MAXIMUM_OPTIMIZATION)
                .setRadius(7).setIsClickable(true).setCellSize(12)
                .setMinZoomShowLabels(12);
        return new SimpleFastPointOverlay(pointTheme, opt);
    }


    @Override
    public void onResume() {
        super.onResume();
        map.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
        map.onPause();
    }
}

虽然这是一种解决方法，但我不喜欢它，因为 popupView 位于显示的中心，并且无法与单击元素的位置相关联。有没有一种方法可以让我对 OsmDroid 的标记和信息窗口有类似的行为？

Answer 1

我终于找到了解决办法：为了获得所需的功能，我应该在每次单击 simpleFastPoint 时添加一个标记，如果单击另一个标记，则删除前一个标记并添加一个新标记。所以性能仍然很好，但具有标记行为。我还让标记不可见

public class OpenMapFragment extends Fragment {
    private Map<Integer, MyPoint> myPointsMap;
    private Context context;
    private PageViewModel pageViewModel;
    private MapView map = null;
    private SimpleFastPointOverlay sfpo;
    private Marker marker;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getParentFragment() != null) {
            pageViewModel = new ViewModelProvider(getParentFragment()).get(PageViewModel.class);
        }
        context = requireActivity().getApplicationContext();

    }

    @Override
    public View onCreateView(
            @NonNull LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View root = inflater.inflate(R.layout.fragment_open_map, container, false);
        LocationManager locationManager = (LocationManager) context.getSystemService(LOCATION_SERVICE);
        Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        map = root.findViewById(R.id.mapview);
        map.setTileSource(TileSourceFactory.MAPNIK);
        map.setMultiTouchControls(true);
        myPointsMap = new HashMap<>();
        pageViewModel.getMyPoints().observe(getViewLifecycleOwner(), myPointsList -> {
           myPointsMap = 
               myPointsList.stream().collect(Collectors.toMap(MyPoint::getId, p -> p));
           if (sfpo != null) {
               map.getOverlays().remove(sfpo);
           }
           sfpo = simpleFastPointOverlayBuilder(myPointsList);
           sfpo.setOnClickListener((points, point) -> {
                MyPoint mp = myPointsMap
                        .get(Integer.valueOf(((LabelledGeoPoint) points.get(point)).getLabel()));
                if (marker != null) {
                    map.getOverlays().remove(marker);
                }
                marker = constructMarker(mp);
                map.getOverlays().add(marker);
            });
            map.getOverlays().add(sfpo);
        });
        return root;
    }

    private SimpleFastPointOverlay simpleFastPointOverlayBuilder(List<MyPoint> myPointList) {
        List<IGeoPoint> points = new ArrayList<>();

        Paint textStyle = new Paint();
        textStyle.setStyle(Paint.Style.FILL);
        textStyle.setColor(Color.parseColor("#111111"));
        textStyle.setTextAlign(Paint.Align.CENTER);
        textStyle.setTextSize(24);

        Paint pointStyle = new Paint();
        pointStyle.setStyle(Paint.Style.FILL);
        pointStyle.setColor(Color.rgb(255, 0, 0));

        for(MyPoint myPoint: myPointList) {
            points.add(new StyledLabelledGeoPoint(myPoint.getLocationInfo().latitude,
                    myPoint.getLocationInfo().longitude, Integer.toString(myPoint.getId()),
                    pointStyle, textStyle));
        }

        SimplePointTheme pointTheme = new SimplePointTheme(points);

        SimpleFastPointOverlayOptions opt = SimpleFastPointOverlayOptions.getDefaultStyle()
                .setSymbol(SimpleFastPointOverlayOptions.Shape.CIRCLE)
                .setAlgorithm(SimpleFastPointOverlayOptions.RenderingAlgorithm.MAXIMUM_OPTIMIZATION)
                .setRadius(7).setIsClickable(true).setCellSize(12)
                .setMinZoomShowLabels(12);
        return new SimpleFastPointOverlay(pointTheme, opt);
    }


    private Marker constructMarker(MyPoint l) {
        GeoPoint gp = new GeoPoint(l.getLocationInfo().latitude, l.getLocationInfo().longitude);
        Marker marker = new Marker(map);
        marker.setPosition(gp);
        CustomMarkerInfoWindow markerInfoWindow = new CustomMarkerInfoWindow(l, R.layout.marker_info_window, map);
        markerInfoWindow.open(marker, gp, 0, 0);
        marker.setAlpha((float) 0);
        marker.setInfoWindow(markerInfoWindow);
        marker.setInfoWindowAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
        marker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
        return marker;
    }


    @Override
    public void onResume() {
        super.onResume();
        map.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
        map.onPause();
    }
}

将 InfoWindow 添加到 FastPointOverlay - OsmDroid

Add InfoWindow to a FastPointOverlay - OsmDroid

java

android

osmdroid