问题描述
最初我使用 Marker 类实现了所需的功能,但是当获得更多的点时性能会严重下降,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);
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));
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,并且无法与被点击元素的位置关联。有没有办法让 OsmDroid 的 Marker 和 InfoWindow 有类似的行为?
解决方法
我终于找到了解决办法: 为了获得所需的功能,我应该在每次点击 simpleFastPoint 时添加一个标记,如果另一个点击删除前一个并添加一个新的。所以性能仍然很好,但具有标记行为。我也让标记不可见
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));
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);
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();
}
}