Develop Reference

how to create a markers zoom animation when is created?

I would like create effect described in the title on my markers when they are added. I see for ios exists method marker.appearAnimation but nothing similar for android. Now I will just add a BitmapDescription to MarkerOptions
final Marker marker = mMap.addMarker(new MarkerOptions()
.position(pos)
.icon(getIconForCluster(new BitmapDescriptor(getObjectWrapped()))
);
any suggestions?

You can use the animateCamera() method from GoogleMaps object.
Example:
mGoogleMap.setOnMapLoadedCallback(()
-> mGoogleMap.animateCamera(CameraUpdateFactory
.newLatLngZoom(mMapBoundary.getCenter(), 17)));
with mMapBoundary is a LatLngBounds object. you can set the markers position here, and 17 is the zoom level.

LatLngBounds with CameraUpdate not zooming in

I have a GoogleMap (Lite Mode) object that has been properly initialized. It works properly with a single Marker and focuses on the proper area using CameraUpdate with newLatLngZoom.
However, when it comes to adding two markers, and have the map keep both in view using LatLngBounds, everything goes bonkers. The map is so zoomed out it shows the entire continent, and the two markers are on-top of each other (along with the polyline).
Kindly assume that the data from the pickup and destination is correct
Here's my code:
googleMap.addMarker(new MarkerOptions()
.position(pickup)
.title(job.getPickupAddress()));
googleMap.addMarker(new MarkerOptions()
.position(destination)
.title(job.getDestinationAddress())
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE)));
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngBounds(new LatLngBounds.Builder().include(pickup).include(destination).build(), 0);
googleMap.moveCamera(cameraUpdate);
String pickupLatLng = job.getPickupLatLong().latitude + "," + job.getPickupLatLong().longitude;
String destinationLatLng = job.getDestinationLatLong().latitude + "," + job.getDestinationLatLong().longitude;
plotPolyLines(pickupLatLng, destinationLatLng);
Output:

Setting a zoom with latlng bounds is not an effective solution for all use cases.
Might be a related Bug Maps Lite mode with incorrect zoom level first time app starts
Try few solutions / hacks listed here : https://issuetracker.google.com/issues/36218443
Like refreshing the map by destroying and recreating
Also check if by using a single marker with bounds builder if the map sets to the proper zoom level
One last thing make sure that zoom level limits have not been applied.

try changing the line
googleMap.moveCamera(cameraUpdate);
to
googleMap.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(xxxx,xxxx) , 14.0f) );
as suggested in How do I set default location and Zoom level for google map api v2?
or use
map.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
That should move the camera closer to your marker.

Android Google Map multiple markers on same location

I have a simple app with Google Map and dynamicly loading markers. In case 2 or more markers have same lat and long only one is presented. Is there any solution for this? This is how I plot markers to map
private void plotMarkers(ArrayList<MyMarker> markers, String markerIcon)
{
if(markers.size() > 0)
{
for (MyMarker myMarker : markers)
{
// Create user marker with custom icon and other options
// Toast.makeText(getApplicationContext(), myMarker.getmLatitude().toString(), Toast.LENGTH_SHORT).show();
MarkerOptions markerOption = new MarkerOptions().position(new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude()));
markerOption.icon(BitmapDescriptorFactory.fromResource(manageMarkerIcon(markerIcon)));
Marker currentMarker = mMap.addMarker(markerOption);
mMarkersHashMap.put(currentMarker, myMarker);
mMap.setInfoWindowAdapter(new MarkerInfoWindowAdapter());
}
}
}

Even if you could, how would you use these two overlapping markers? only the top one would be visible.
Instead, if two markers overlap, you could express the data they share in one marker that contains them both.
this answer might assist: Android Google Maps v2 - Add object to marker

Both markers are shown, but both on the same location and it seems to be only one, and if you click on them, only one info window will be presented.
If you really need to add two markers at the same location you may want to take a look at Google Maps Android Marker Clustering Utility. It's part of the Google Maps Android API Utility Library.
A possible workaround could be to check if there is another marker in the position you are trying to draw the marker into, and if so, move the new marker a little bit appart.

Adding hotspots with identical lat/long

I'm adding hotspots to my map with the following code:
public void addMarker(MyCustomMarker marker) {
LatLng latLng = new LatLng(marker.getLatitude(), marker.getLongitude());
mMap.addMarker(new MarkerOptions().position(latLng).title("Marker"));
}
What are the consequences of adding multiple hotspots with the identical lat/long? Will they both remain on the map and in memory, or will adding a new marker override the last one at that position?

Adding a new marker with identical lat/long will make both remain on the map and in memory.

The lat/long of a marker are just instance variables so no, this won't replace the existing Marker.

code to add markers to map using android google maps v2

I have lat&long values from database.how to display markers based on lat &long values using android google map api v2.In original android google maps,we display markers based on concept itemoverlay. In v2,I dont know how to display markers.
dbAdapter.open();
Cursor points = dbAdapter.clustercall(Btmlft_latitude, toprgt_latitude,
Btmlft_longitude, toprgt_longitude, gridsize1);
int c = points.getCount();
Log.d("count of points", "" + c);
if (points != null) {
if (points.moveToFirst()) {
do {
int latitude = (int) (points.getFloat(points
.getColumnIndex("LATITUDE")) * 1E6);
int longitude = (int) (points.getFloat(points
.getColumnIndex("LONGITUDE")) * 1E6);
mapView.addMarker(new MarkerOptions().position(
new LatLng(latitude, longitude)).icon(
BitmapDescriptorFactory.defaultMarker()));
} while (points.moveToNext());
}
}
points.close();
dbAdapter.close();
That is mycode.I am getting lat&long values from database,but how to add markers based on lat &long values to map.
I read the android google maps api v2.In that have only give statically added data of markers

Use the Marker Class
An icon placed at a particular point on the map's surface. A marker icon is drawn oriented against the device's screen rather than the map's surface; i.e., it will not necessarily change orientation due to map rotations, tilting, or zooming.
A marker has the following properties:
Anchor
The point on the image that will be placed at the LatLng position of the marker. This defaults to 50% from the left of the image and at the bottom of the image.
Position
The LatLng value for the marker's position on the map. You can change this value at any time if you want to move the marker.
Title
A text string that's displayed in an info window when the user taps the marker. You can change this value at any time.
Snippet
Additional text that's displayed below the title. You can change this value at any time.
Icon
A bitmap that's displayed for the marker. If the icon is left unset, a default icon is displayed. You can specify an alternative coloring of the default icon using defaultMarker(float). You can't change the icon once you've created the marker.
Drag Status
If you want to allow the user to drag the marker, set this property to true. You can change this value at any time. The default is true.
Visibility
By default, the marker is visible. To make the marker invisible, set this property to false. You can change this value at any time.
GoogleMap map = ... // get a map.
// Add a marker at San Francisco.
Marker marker = map.addMarker(new MarkerOptions()
.position(new LatLng(37.7750, 122.4183))
.title("San Francisco")
.snippet("Population: 776733"));

You have to use the method GoogleMap.addMarker(MarkerOptions);
I've explained this in a tutorial on my blog:
http://bon-app-etit.blogspot.be/2012/12/add-informationobject-to-marker-in.html
On this blog, you'll find some more posts concerning the new Maps API:
Move the map to current or some location
Create the custom InfoWindow
Associate geodata or objects to a marker

I'm guessing the issue is that you are multiplying your latitude/longitude values by 1E6 instead of dividing them by 1E6. If your stored values came from GeoPoints, that might be your issue. Otherwise, the way you are adding the Markers is fine and should work.
i.e. the lat/lng values you pass to new LatLng() should look like 45.4,-95.5 NOT 45400000,-95500000
Check out the following code:
//mMap is a GoogleMap and point is a GeoPoint
this.mMap.addMarker(getMarker(point, drawableId))
...
public MarkerOptions getMarker(GeoPoint point, int drawableId)
{
return new MarkerOptions()
.position(new LatLng(point.getLatitudeE6() / 1000000.0, point.getLongitudeE6() / 1000000.0))
.icon(BitmapDescriptorFactory.fromResource(drawableId));
}