studio - marker android map

Android Maps Point Agrupación

Question

¿Hay algún código para Point Clustering en Android? ¿Cómo puedo cargar mil puntos sin tener problemas de rendimiento?

Answer 1

Anoche entré en PointClustering en Android MapView. Vi que no había nada para la comunidad, así que me gustaría compartir.

Agrupa los geopoints si la proyección de ellos en mapView está demasiado cerca. También representa solo los puntos visibles.

ACTUALIZAR

Código reelaborado desde scrach.

Ahora disponible en GitHub

1. Código reelaborado desde cero
2. Algoritmo de agrupamiento GVM usado (bastante rápido pero no posiciona el punto agrupado como el mío)
3. Pronto para agregar el algoritmo de agrupamiento anterior también

Answer 2

Google Maps Android Utils tiene una solución para esto: Google Maps Android Marker Clustering Utility .

Añadir dependencia

implementation ''com.google.maps.android:android-maps-utils:0.5''

Crea tu propio ClusterItem

class MyItem(
private val position: LatLng,
val title: String,
private val snippet: String
) : ClusterItem {
override fun getPosition() = position
override fun getTitle() = title
override fun getSnippet() = snippet
}

Configurar el administrador de clúster y agregar elementos

override fun onMapReady(googleMap: GoogleMap) {
val clusterManager = ClusterManager<MyItem>(this, googleMap)
googleMap.setOnCameraIdleListener(clusterManager)
clusterManager.addItem(MyItem(LatLng(51.51, -0.12), "title", "snippet"))
}

¡Eso es! Los elementos ahora se muestran de la siguiente manera:

Personalizar el icono

Para personalizar el ícono, agregue el val icon: BitmapDescriptor a su ClusterItem y cambie el renderizador del administrador del clúster:

 clusterManager.renderer = object : DefaultClusterRenderer<MyItem>(this, googleMap, clusterManager) {
override fun onBeforeClusterItemRendered(item: MyItem, markerOptions: MarkerOptions) {
markerOptions.icon(item.icon)
}
}

Haciendo clic en los elementos

Como regla general, cualquier interacción con marcadores debe pasar por el administrador de clúster. Lo mismo se aplica a hacer que los elementos se puedan hacer clic.

 googleMap.setOnMarkerClickListener(clusterManager)
clusterManager.setOnClusterItemClickListener {
Toast.makeText(this, "Clicked on item ${it.title}", Toast.LENGTH_SHORT).show()
true
}

Del mismo modo, puede llamar a googleMap.setOnInfoWindowClickListener(clusterManager) y clusterManager.setOnClusterItemInfoWindowClickListener para manejar los clics en la ventana de información.

Answer 3

Hay una buena muestra para eso. Consulte aquí: http://code.google.com/p/android-playground-erdao/source/browse/trunk/SampleClusterMap/?r=226

Answer 4

Hay una solicitud de extracción en github para la biblioteca de Polaris (https://github.com/cyrilmottier/Polaris) que agrega clústeres:

https://github.com/cyrilmottier/Polaris/pull/20

https://github.com/damianflannery/Polaris/tree/clustering

Answer 5

He vuelto a trabajar en el código anterior y controlé el ícono de no overlay en la vista del mapa y separé el grupo y el punto único.

Mi código:

MMapView.java

import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.impiger.maphighlight.R;
//Reference - http://.com/questions/7447350/android-maps-point-clustering
public class MMapView extends MapView {
private static final String TAG = MMapView.class.getSimpleName();
private static final int MAX_VISIBLE_POINTS = 1;
private PMapViewOverlay itemizedOverlay;
private List<Overlay> mapOverlays;
private List<GeoPoint> geoPoints = new ArrayList<GeoPoint>();
private BitmapDrawable drawable;
private Context context;
private Drawable emptyDrawable;
private int count;
private int oldZoomLevel = -1;
ArrayList<OverlayItemExtended> mOverlays;
public MMapView(Context context, AttributeSet attrs) {
super(context, attrs);
this.context = context;
mapOverlays = getOverlays();
drawable = new BitmapDrawable(
BitmapFactory.decodeResource(getResources(),
R.drawable.blue_65));
itemizedOverlay = new PMapViewOverlay(drawable, context);
emptyDrawable = context.getResources().getDrawable(
R.drawable.marker);
mOverlays = new ArrayList<OverlayItemExtended>();
init();
}
private GeoPoint getPoint(double lat, double lon) {
return (new GeoPoint((int) (lat * 1000000.0), (int) (lon * 1000000.0)));
}
private void init(){
putPoint(11, 77, true);
putPoint(11.5, 76.6, false);
putPoint(10.98383, 77.32112, false);
putPoint(10, 77, false);
putPoint(11, 78, false);
putPoint(11, 77.5, false);
putPoint(10.5, 77, false);
putPoint(12, 77, false);
putPoint(11.77, 77.11, false);
putPoint(12.1, 78.33, false);
putPoint(11.83, 77.293, false);
putPoint(11.12, 77, false);
putPoint(11.13, 77, false);
putPoint(11.14, 77, false);
putPoint(11.15, 77, false);
putPoint(11.12, 77.2, false);
putPoint(11.13, 77.34, false);
putPoint(11.14, 77.4, false);
putPoint(11.15, 77.1977, false);
putPoint(11.347373, 77.5627783, true);
putPoint(11.53454, 76.696645, false);
putPoint(10.19282, 77.847373, false);
putPoint(10.4728, 76.39388, false);
putPoint(11.4563, 78, false);
putPoint(11.73663, 77.5927, false);
putPoint(10.5674, 77.6762, false);
putPoint(12.02882, 77.672782, false);
putPoint(11.7767876, 77.1123423, false);
putPoint(12.18332, 78.33, false);
putPoint(11.8393883, 77.293938783, false);
putPoint(11.388323, 77.9478723, false);
putPoint(11.1345645, 77.97723, false);
putPoint(11.1423423, 77.73774, false);
putPoint(11.1552, 77.793783, false);
putPoint(11.127895434, 77.2944554, false);
putPoint(11.13232345, 77.342234, false);
putPoint(11.14456573, 77.4, false);
putPoint(11.159765, 77.1977, false);
}
public void putPoint(double lat, double lon, boolean isMyPosition) {
int latitude = (int) (lat * 1E6);
int longitude = (int) (lon * 1E6);
GeoPoint geo = new GeoPoint(latitude, longitude);
geo = getPoint(lat, lon);
/*
* Remove doubles
*/
Boolean alreadyExists = false;
for (GeoPoint item : geoPoints) {
if (item.getLatitudeE6() == geo.getLatitudeE6()
&& item.getLongitudeE6() == geo.getLongitudeE6()) {
alreadyExists = true;
}
}
if (!alreadyExists) {
geoPoints.add(geo);
}
}
/*
* Place the overlays
*/
public void placeOverlays() {
itemizedOverlay.removeAllOverlays();
getOverlays().clear();
mapOverlays.clear();
mOverlays.clear();
int i = 1;
for (GeoPoint item : geoPoints) {
OverlayItemExtended overlayitem = new OverlayItemExtended(item,
"title "+i, "snippet");
// Here is where the magic happens
addOverlayItemClustered(overlayitem, this,
geoPoints.size());
i++;
}
for(int j=0;j<mOverlays.size();j++){
OverlayItemExtended overlayItem = mOverlays.get(j);
if(overlayItem.isMaster){
if(overlayItem.slaves.size() > 0){
itemizedOverlay = new PMapViewOverlay(drawable, context);
itemizedOverlay.addOverlayItem(overlayItem);
}else{
itemizedOverlay = new PMapViewOverlay(emptyDrawable, context);
itemizedOverlay.addOverlayItem(overlayItem);
}
mapOverlays.add(itemizedOverlay);
}
}
}
/*
* Update the points at panned / zoom etc
*/
public void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
if (getZoomLevel() != oldZoomLevel) {
placeOverlays();
}
oldZoomLevel = getZoomLevel();
}
public void addOverlayItemClustered(OverlayItemExtended thisOverlay,
MapView mapView, int totalPoints) {
for (OverlayItemExtended otherOverlay : mOverlays) {
/*
* Thresshold for the clustering
*/
/*
* Zoom level >15 don''t cluster If less than Max_Visible_points
* don''t cluster
*/
if (mapView.getZoomLevel() >= 14
|| (MAX_VISIBLE_POINTS > totalPoints)
&& PointCluster.getOverLayItemDistance(thisOverlay,
otherOverlay, mapView) > 60) {
mOverlays.add(thisOverlay);
return;
}
if (PointCluster.getOverLayItemDistance(thisOverlay, otherOverlay,
mapView) < 90 && !thisOverlay.isClustered) {
// Here is where the clustering actually happens
if (otherOverlay.isMaster) {
thisOverlay.isMaster = false;
// otherOverlay.isMaster = false;
thisOverlay.isClustered = true;
otherOverlay.isClustered = true;
otherOverlay.slaves.push(thisOverlay);
thisOverlay.parent = otherOverlay;
} else if (PointCluster.getOverLayItemDistance(thisOverlay,
otherOverlay.parent, mapView) < 90
&& otherOverlay.isClustered) {
thisOverlay.isMaster = false;
thisOverlay.isClustered = true;
thisOverlay.parent = otherOverlay.parent;
otherOverlay.parent.slaves.push(thisOverlay);
}
}
}
mOverlays.add(thisOverlay);
}
}

OverlayItemExtended.java

import java.util.Stack;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.OverlayItem;
public class OverlayItemExtended extends OverlayItem {
public boolean isClustered = false;
public boolean isMaster = true;
public boolean isMe = false;
public OverlayItemExtended parent;
public Stack<OverlayItemExtended> slaves = new Stack<OverlayItemExtended>();
public OverlayItemExtended(GeoPoint point, String title, String snippet) {
super(point, title, snippet);
}
}

PMapViewOverlay.java

import java.util.ArrayList;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapView;
@SuppressWarnings("rawtypes")
public class PMapViewOverlay extends ItemizedOverlay {
private static final String TAG = PMapViewOverlay.class.getSimpleName();
private Context context;
private ArrayList<OverlayItemExtended> mOverlays;
public PMapViewOverlay(Drawable defaultMarker, Context context) {
super(boundCenterBottom(defaultMarker));
this.context = context;
mOverlays = new ArrayList<OverlayItemExtended>();
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(25);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
paint.setColor(Color.WHITE);
}
@Override
protected OverlayItemExtended createItem(int i) {
return mOverlays.get(i);
}
@Override
public int size() {
return mOverlays.size();
}
public void addOverlayItem(OverlayItemExtended overlay) {
mOverlays.add(overlay);
populate();
}
public void removeAllOverlays() {
mOverlays.clear();
populate();
}
public void removePointsButMe() {
for (int i = 0; i < mOverlays.size(); i++) {
OverlayItemExtended overlay = mOverlays.get(i);
if (overlay.isMe) {
mOverlays.clear();
addOverlayItem(overlay);
break;
}
}
populate();
}
Paint paint = new Paint();
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
// cycle through all overlays
for (int index = 0; index < mOverlays.size(); index++) {
OverlayItemExtended item = mOverlays.get(index);
// Converts lat/lng-Point to coordinates on the screen
GeoPoint point = item.getPoint();
Point ptScreenCoord = new Point();
mapView.getProjection().toPixels(point, ptScreenCoord);
if (item.isMaster) {
if (item.slaves.size() > 0) {
canvas.drawText(item.slaves.size() + 1 + "",
ptScreenCoord.x, ptScreenCoord.y - 13, paint);
}
}
}
}
@Override
protected boolean onTap(int index) {
OverlayItemExtended item = mOverlays.get(index);
if (item.isMaster) {
if (item.slaves.size() == 0) {
Toast.makeText(context, "You tapped item " + item.getTitle(),
Toast.LENGTH_LONG).show();
}
}
return super.onTap(index);
}
}

No cambié ningún código en PointCluster.java.

Espero que esto ayude a alguien.

Answer 6

PARA ANDROID V2 AQUÍ VA CÓDIGO CLUSTERING

Hola a todos

Miré varias bibliotecas y las encontré tan complejas. No podía entender una palabra, así que decidí hacer mi propio algoritmo. Aquí va mi código en Java.

static int OFFSET = 268435456;
static double RADIUS = 85445659.4471;
static double pi = 3.1444;
public static double lonToX(double lon) {
return Math.round(OFFSET + RADIUS * lon * pi / 180);
}
public static double latToY(double lat) {
return Math.round(OFFSET
- RADIUS
* Math.log((1 + Math.sin(lat * pi / 180))
/ (1 - Math.sin(lat * pi / 180))) / 2);
}
public static int pixelDistance(double lat1, double lon1, double lat2,
double lon2, int zoom) {
double x1 = lonToX(lon1);
double y1 = latToY(lat1);
double x2 = lonToX(lon2);
double y2 = latToY(lat2);
return (int) (Math
.sqrt(Math.pow((x1 - x2), 2) + Math.pow((y1 - y2), 2))) >> (21 - zoom);
}
static ArrayList<Cluster> cluster(ArrayList<Marker> markers, int zoom) {
ArrayList<Cluster> clusterList = new ArrayList<Cluster>();
ArrayList<Marker> originalListCopy = new ArrayList<Marker>();
for (Marker marker : markers) {
originalListCopy.add(marker);
}
/* Loop until all markers have been compared. */
for (int i = 0; i < originalListCopy.size();) {
/* Compare against all markers which are left. */
ArrayList<Marker> markerList = new ArrayList<Marker>();
for (int j = i + 1; j < markers.size();) {
int pixelDistance = pixelDistance(markers.get(i).getLatitude(),
markers.get(i).getLongitude(), markers.get(j)
.getLatitude(), markers.get(j).getLongitude(),
zoom);
if (pixelDistance < 40) {
markerList.add(markers.get(i));
markerList.add(markers.get(j));
markers.remove(j);
originalListCopy.remove(j);
j = i + 1;
} else {
j++;
}
}
if (markerList.size() > 0) {
Cluster cluster = new Cluster(clusterList.size(), markerList,
markerList.size() + 1, originalListCopy.get(i)
.getLatitude(), originalListCopy.get(i)
.getLongitude());
clusterList.add(cluster);
originalListCopy.remove(i);
markers.remove(i);
i = 0;
} else {
i++;
}
/* If a marker has been added to cluster, add also the one */
/* we were comparing to and remove the original from array. */
}
return clusterList;
}

Simplemente ingrese su lista de arreglos aquí que contiene la latitud y la longitud y luego para mostrar los clústeres aquí va la función

@Override
public void onTaskCompleted(ArrayList<FlatDetails> flatDetailsList) {
LatLngBounds.Builder builder = new LatLngBounds.Builder();
originalListCopy = new ArrayList<FlatDetails>();
ArrayList<Marker> markersList = new ArrayList<Marker>();
for (FlatDetails detailList : flatDetailsList) {
markersList.add(new Marker(detailList.getLatitude(), detailList
.getLongitude(), detailList.getApartmentTypeString()));
originalListCopy.add(detailList);
builder.include(new LatLng(detailList.getLatitude(), detailList
.getLongitude()));
}
LatLngBounds bounds = builder.build();
int padding = 0; // offset from edges of the map in pixels
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
googleMap.moveCamera(cu);
ArrayList<Cluster> clusterList = Utils.cluster(markersList,
(int) googleMap.getCameraPosition().zoom);
// Removes all markers, overlays, and polylines from the map.
googleMap.clear();
// Zoom in, animating the camera.
googleMap.animateCamera(CameraUpdateFactory.zoomTo(previousZoomLevel),
2000, null);
CircleOptions circleOptions = new CircleOptions().center(point) //
// setcenter
.radius(3000) // set radius in meters
.fillColor(Color.TRANSPARENT) // default
.strokeColor(Color.BLUE).strokeWidth(5);
googleMap.addCircle(circleOptions);
for (Marker detail : markersList) {
if (detail.getBhkTypeString().equalsIgnoreCase("1 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk1)));
} else if (detail.getBhkTypeString().equalsIgnoreCase("2 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk_2)));
}
else if (detail.getBhkTypeString().equalsIgnoreCase("3 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk_3)));
} else if (detail.getBhkTypeString().equalsIgnoreCase("2.5 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk2)));
} else if (detail.getBhkTypeString().equalsIgnoreCase("4 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk_4)));
} else if (detail.getBhkTypeString().equalsIgnoreCase("5 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk5)));
} else if (detail.getBhkTypeString().equalsIgnoreCase("5+ BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk_5)));
}
else if (detail.getBhkTypeString().equalsIgnoreCase("2 BHK")) {
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(detail.getLatitude(), detail
.getLongitude()))
.snippet(String.valueOf(""))
.title("Flat" + flatDetailsList.indexOf(detail))
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.bhk_2)));
}
}
for (Cluster cluster : clusterList) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable = true;
options.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.cluster_marker, options);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.white));
paint.setTextSize(30);
canvas.drawText(String.valueOf(cluster.getMarkerList().size()), 10,
40, paint);
googleMap.addMarker(new MarkerOptions()
.position(
new LatLng(cluster.getClusterLatitude(), cluster
.getClusterLongitude()))
.snippet(String.valueOf(cluster.getMarkerList().size()))
.title("Cluster")
.icon(BitmapDescriptorFactory.fromBitmap(bitmap)));
}
}

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Answer 7

También existe esta respuesta que solo requiere que anule el método de sorteo de su Overlay. Divide tu mapView en secciones, por lo que es un poco menos sofisticado. Pero al menos funcionó.