/**
* 得到坐标群的中心点坐标
*
* @param list
* @return
*/
public LatLng getCenterPointer(List<MyPoint> list) {
double maxLng = 0;
double maxLat = 0;
double minLng = 0;
double minLat = 0;
for (int i = 0; i < list.size(); i++) {
double lat = list.get(i).getLat();
double lng = list.get(i).getLng();
if (i == 0) {
minLat = maxLat = lat;
minLng = maxLng = lng;
continue;
}
if (minLat > lat) {
minLat = lat;
}
if (minLng > lng) {
minLng = lng;
}
if (maxLat < lat) {
maxLng = lat;
}
if (maxLng < lng) {
maxLng = lng;
}
}
LatLng southwest = new LatLng(minLat, minLng);
LatLng northeast = new LatLng(maxLat, maxLng);
LatLngBounds bounds = new LatLngBounds.Builder().include(northeast).include(southwest).build();
return bounds.getCenter();
}
public void initOverlay() {
// add marker overlay
addOverlay(39.963175, 116.400244, R.drawable.icon_marka, 9);
addOverlay(39.942821, 116.369199, R.drawable.icon_markb, 5);
MarkerOptions ooC = (MarkerOptions) addOverlay(39.939723, 116.425541, R.drawable.icon_markc, 7);
MarkerOptions ooD = (MarkerOptions) addOverlay(39.906965, 116.401394, R.drawable.icon_markd, 0);
ooC.perspective(false).anchor(0.5f, 0.5f).rotate(30);
ooD.period(10);
// ArrayList<BitmapDescriptor> giflist = new ArrayList<BitmapDescriptor>();
// giflist.add(bdA);
// giflist.add(bdB);
// giflist.add(bdC);
BitmapDescriptor bd = BitmapDescriptorFactory.fromResource(R.drawable.icon_gcoding);
mBitmapList.add(bd);
// add ground overlay
LatLng southwest = new LatLng(39.92235, 116.380338);
LatLng northeast = new LatLng(39.947246, 116.414977);
LatLngBounds bounds = new LatLngBounds.Builder().include(northeast).include(southwest).build();
BitmapDescriptor bdGround = BitmapDescriptorFactory.fromResource(R.drawable.ground_overlay);
mBitmapList.add(bdGround);
OverlayOptions ooGround =
new GroundOverlayOptions().positionFromBounds(bounds).image(bdGround).transparency(0.8f);
mBaiduMap.addOverlay(ooGround);
MapStatusUpdate u = MapStatusUpdateFactory.newLatLng(bounds.getCenter());
mBaiduMap.setMapStatus(u);
mBaiduMap.setOnMarkerDragListener(
new OnMarkerDragListener() {
public void onMarkerDrag(Marker marker) {}
public void onMarkerDragEnd(Marker marker) {
Toast.makeText(
OverlayDemo.this,
"拖拽结束，新位置："
+ marker.getPosition().latitude
+ ", "
+ marker.getPosition().longitude,
Toast.LENGTH_LONG)
.show();
}
public void onMarkerDragStart(Marker marker) {}
});
}
@SuppressLint("NewApi")
public void run() {
if (clusters.equals(DefaultClusterRenderer.this.mClusters)) {
mCallback.run();
return;
}
final MarkerModifier markerModifier = new MarkerModifier();
final float zoom = mMapZoom;
final boolean zoomingIn = zoom > mZoom;
final float zoomDelta = zoom - mZoom;
final Set<MarkerWithPosition> markersToRemove = mMarkers;
final LatLngBounds visibleBounds = mMap.getMapStatus().bound;
// TODO: Add some padding, so that markers can animate in from off-screen.
// Find all of the existing clusters that are on-screen. These are candidates for
// markers to animate from.
List<Point> existingClustersOnScreen = null;
if (DefaultClusterRenderer.this.mClusters != null && SHOULD_ANIMATE) {
existingClustersOnScreen = new ArrayList<Point>();
for (Cluster<T> c : DefaultClusterRenderer.this.mClusters) {
if (shouldRenderAsCluster(c) && visibleBounds.contains(c.getPosition())) {
Point point = mSphericalMercatorProjection.toPoint(c.getPosition());
existingClustersOnScreen.add(point);
}
}
}
// Create the new markers and animate them to their new positions.
final Set<MarkerWithPosition> newMarkers =
Collections.newSetFromMap(new ConcurrentHashMap<MarkerWithPosition, Boolean>());
for (Cluster<T> c : clusters) {
boolean onScreen = visibleBounds.contains(c.getPosition());
if (zoomingIn && onScreen && SHOULD_ANIMATE) {
Point point = mSphericalMercatorProjection.toPoint(c.getPosition());
Point closest = findClosestCluster(existingClustersOnScreen, point);
if (closest != null) {
LatLng animateTo = mSphericalMercatorProjection.toLatLng(closest);
markerModifier.add(true, new CreateMarkerTask(c, newMarkers, animateTo));
} else {
markerModifier.add(true, new CreateMarkerTask(c, newMarkers, null));
}
} else {
markerModifier.add(onScreen, new CreateMarkerTask(c, newMarkers, null));
}
}
// Wait for all markers to be added.
markerModifier.waitUntilFree();
// Don't remove any markers that were just added. This is basically anything that had
// a hit in the MarkerCache.
markersToRemove.removeAll(newMarkers);
// Find all of the new clusters that were added on-screen. These are candidates for
// markers to animate from.
List<Point> newClustersOnScreen = null;
if (SHOULD_ANIMATE) {
newClustersOnScreen = new ArrayList<Point>();
for (Cluster<T> c : clusters) {
if (shouldRenderAsCluster(c) && visibleBounds.contains(c.getPosition())) {
Point p = mSphericalMercatorProjection.toPoint(c.getPosition());
newClustersOnScreen.add(p);
}
}
}
// Remove the old markers, animating them into clusters if zooming out.
for (final MarkerWithPosition marker : markersToRemove) {
boolean onScreen = visibleBounds.contains(marker.position);
// Don't animate when zooming out more than 3 zoom levels.
// TODO: drop animation based on speed of device & number of markers to animate.
if (!zoomingIn && zoomDelta > -3 && onScreen && SHOULD_ANIMATE) {
final Point point = mSphericalMercatorProjection.toPoint(marker.position);
final Point closest = findClosestCluster(newClustersOnScreen, point);
if (closest != null) {
LatLng animateTo = mSphericalMercatorProjection.toLatLng(closest);
markerModifier.animateThenRemove(marker, marker.position, animateTo);
} else {
markerModifier.remove(true, marker.marker);
}
} else {
markerModifier.remove(onScreen, marker.marker);
}
}
markerModifier.waitUntilFree();
mMarkers = newMarkers;
DefaultClusterRenderer.this.mClusters = clusters;
mZoom = zoom;
mCallback.run();
}