将信息窗口添加到FastPointOverlay-OsmDroid

Question

最初我使用Marker类实现了所需的功能，但当达到更多时，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();
}
}

虽然这是一种变通方法，但我不喜欢它，因为popupView位于显示的中心，并且不能与单击的元素的位置相关联。有没有一种方法可以让我对OsmDroid的Marker和InfoWindow有类似的行为？

Answer 1

我终于找到了一个解决方案：为了获得所需的功能性，我应该在每次单击simpleFastPoint时添加一个标记，如果另一次单击，则删除前一个标记并添加新的标记。所以性能仍然很好，但有了Marker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();
}
}