We're using OpenStreetMaps with Osmdroid. We need to make the user's marker 'pulse' a small force field ( like Uber's app ).
The Marker class doesn't provide access to the View that's plotted as the marker, so, I'm not able start an animation with 'startAnimation'.
Does anybody know how to do such thing?
Here goes a snippet of my code:
mUserMarker = new Marker(mOpenStreetMap);
mUserMarker.setPosition(mCurrentPosition);
mUserMarker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_CENTER);
mUserMarker.setIcon(ContextCompat.getDrawable(getActivity(), R.drawable.ic_my_position));
mUserMarker.setDraggable(true);
mUserMarker.setInfoWindow(null);
mOpenStreetMap.getOverlays().add(mUserMarker);
mOpenStreetMap.invalidate();
Related
I'm trying to develop an offline navigation app for Trekking.
The app shows to the user a list of nearby track/routes where he can go.
Examples:
-Walking to Etna Vulcan
-Walking in the wood.
I've several KML files provided to me by local guides, each one for a different track.
So, if i choose "Walking to Etna Vulcan", I will have a Map with the track that I've to follow to go the Etna Vulcan, with some markers of interesting point (Examples: Refuges, Monuments). This data is actually ready, in KML format.
So:
The user chooses the track from the list that I provide, then the phone shows the track on the map(from kml or equivalent) with the current user position.
I'm doing it with MapBox sdk (but i'm open to alternatives).
Actually, I've successfully downloaded an offline map of the zone (Sicily), but i'm note sure how to write my kml on the map.
I also imported a kml in Mapbox Studio, but i don't know how to download a MapBox Studio Map into my application.
Thank you for your time!
If Mapbox seems like a good alternative then you just need to study their Android SDK to see if and how drawing markers and coordinate tracks are supported.
For the tracks see https://www.mapbox.com/android-sdk/geojson/
The relevant (to you) part is right at the end of their example code:
LatLng[] pointsArray = points.toArray(new LatLng[points.size()]);
// Draw Points on MapView
mapboxMap.addPolyline(new PolylineOptions()
.add(pointsArray)
.color(Color.parseColor("#3bb2d0"))
.width(2));
Here they have the coordinate points in the points ArrayList. They have been extracted from GeoJSON data, but you would just need to extract the coordinate points from the KML data and then draw the track based on that example.
For markers see https://www.mapbox.com/android-sdk/marker/
They have this example code:
mapboxMap.addMarker(new MarkerOptions()
.position(new LatLng(48.13863, 11.57603))
.title("Hello World!")
.snippet("Welcome to my marker."));
For a marker with a custom icon see https://www.mapbox.com/android-sdk/custom-marker-icon/
They have this example code:
// Create an Icon object for the marker to use
IconFactory iconFactory = IconFactory.getInstance(MainActivity.this);
Drawable iconDrawable = ContextCompat.getDrawable(MainActivity.this, drawable.ic_directions_boat_black_18dp);
Icon icon = iconFactory.fromDrawable(iconDrawable);
// Add the custom icon marker to the map
mapboxMap.addMarker(new MarkerOptions()
.position(new LatLng(-33.8500000, 18.4158234))
.title("Cape Town Harbour")
.icon(icon));
So you would just use a regular Android Drawable for the custom icon.
Looks quite convenient. I haven't used the Mapbox SDK myself.
I'm new to android development.
I need to load a custom google-map someone made in google maps (a map with marks and information).
My question is how to load this map on a android app (and not just creating a new map and manually adding all the markers and information -- because than each time client wants to change something in the map he will need to change it in 2 places).
I know i can just make a webview but than i can't access the location and focus on users location -- is there any other way?
Thanks for the help!
You can take the location of your indicated region and add the markers manually if there isn't place to mark.
static final LatLng MELBOURNE = new LatLng(-37.813, 144.962);
Marker melbourne = mMap.addMarker(new MarkerOptions()
.position(MELBOURNE)
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
https://developers.google.com/maps/documentation/android-api/marker
I am trying to write an android application that use google map to show some points (shop places) on the map. I have shop specifications including LatLng, title, etc on a database server and have a rest api to access them. my problem is the total amount of shops are too much, so I can't get all of them and show them on the map, so I need to have some kind of lazy loading showing to access just shops that are required.
I found this link, but it isn't lazy loading, what I understood is that it gets all the item first and show them with marker, which isn't what exactly I need.
Is it possible to do this? if yes how ? please give me some example or tutorial if it is possible.
thanks in advance.
Why you dont use Google Maps Android Marker Clustering Utility?
I used to load 12000 markers in a map and is ok for me. I load all of this markers at the same time.
To use lazy loading you can determine the viewable map area and load only this markers.
You can use OnCameraChangeListener to determine it:
map.setOnCameraChangeListener(new OnCameraChangeListener() {
#Override
public void onCameraChange(CameraPosition position) {
BOUNDS = map.getProjection().getVisibleRegion().latLngBounds;
Float mapZoom = map.getCameraPosition().zoom;
LatLng latlong = map.getCameraPosition().target;
updateItems(BOUNDS);
mapZoom = map.getCameraPosition().zoom;
}
});
I have a specific problem with Google Maps for Android. I should be able to make Google Maps look like the map on this page www.bam.brno.cz, but I'm new to Goole Maps for Android so I don't know if there's a way to do it.
I don't have any of those map images, but i guess there should be a way to get it from the internet (like WMS or something). If I was eventually able to save them and use them offline that would be great, but if not and the app would have to use data connection, it's also ok.
I already got app with google maps, so the question is just about how to get the map images and replace default google maps images.
Also if that wouldn't be posible, I would like to know what other options I have(like if theres some other map images I can use and how)
PS: not sure how it's called correctly: map images/map tiles
EDIT: I don't care about the objects, I know how to do them. I don't know how to get the whole map, the tiles it's made from. I'm already familiar with markers and camera moving etc.
Yes you can use marker for same.
You can try some thing like ..
m = myMap.addMarker(new MarkerOptions()
.position(new LatLng(startLatLng.latitude, startLatLng.longitude))
.title("Vivek Test"));
Here m is Marker;
and myMap is GoogleMap
Complete structure like this ..
myMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
//myMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
myMap.setMyLocationEnabled(true);
myMap.moveCamera(CameraUpdateFactory.newLatLng(startLatLng));
myMap.animateCamera(CameraUpdateFactory.zoomTo(20), 2000, null);
m = myMap.addMarker(new MarkerOptions()
.position(new LatLng(startLatLng.latitude, startLatLng.longitude))
.title("Vivek Test"));
Hope it helps. Cheers!
There is at least one file holding a series of coordinates (Latitude, Longitude) of each of the colored lines. Get those coordinates and use Polylines. These should take care of the colored lines. The grey dots would be Markers and these could be in the same file. Assuming that GoogleMaps has similar places names, then with these two you ought to be able to reproduce the map.
We're porting an app from the v1 Maps API to the v2 API, and having trouble with markers.
We need markers that point in a specific geographic direction. In V1, we could build the bitmap pointing in the right direction at draw time, but in V2 the marker bitmap can't be changed.
I'm not sure if the best approach is to destroy and re-build all our markers when the map is rotated (which sounds like a performance problem), or to try drawing them all ourselves. That could be via a TileOverlay or via a view of our own that we sat on top of the map.
I don't really like any of these approaches. Has anyone tried any of them ?
UPDATE:
I've tried drawing via a view of our own, but that was far too laggy when the map was dragged.
I'm now destroying & recreating the markers, but that is (as expected) a performance problem, taking ~2000mS to update 60 markers.
Good news everyone! Google has added rotation to the Maps API, so we don't have to roll our own implementations anymore.
They have also added flat markers, which I guess is more related to the original question. A flattened marker will always stay in the orientation it was originally drawn on the map: https://developers.google.com/maps/documentation/android/marker#flatten_a_marker
The only requirement is that you reference the latest version of Google Play Services.
I'm also rewriting my app (Runbot) for the new API and had to figure out how to create custom markers representing milestones (like 1km, 2km, ...) and how to show or show not all of them depending on the zoom level.
I had a custom drawable that I used for the v1 API and what I do now to render the markers is about this (Position is a class of my own that holds the position and further information; all needed here is its LatLng property):
private void addMarker(Position p, MilestoneDrawable milestone) {
if (mMarkers.containsKey(p)) {
mMarkers.get(p).setVisible(true);
} else {
Marker m = mMap.addMarker(new MarkerOptions()
.position(p.latLng)
.icon(BitmapDescriptorFactory.fromBitmap(Util.drawableToBitmap(milestone)))
.anchor(0.5f, 1.0f) // bottom center
);
mMarkers.put(p, m);
}
}
Besides creating and adding the custom markers, what you see is that I keep the markers in a HashMap so I do not have to destroy and create them all the time. When it comes to zooming and deciding which ones to show, I first set all of the markers to invisible and than call addMarker() for those I want to be shown, and those which I already have in the HashMap I simply make visible again.
I hope this helps you a bit. I have a bit of mixed feelings towards the new API...
I had a similar problem where I had markers that needed to rotate. My solution was to have the object the marker represented be responsible for generating the marker. I have a few methods in the object that look like:
protected Marker getMarker(GoogleMap map) {
if (this.marker == null) {
marker = map.addMarker(new MarkerOptions().position(location).
icon(BitmapDescriptorFactory.fromBitmap(BusMarkerImageFactory.
getMarkerIcon(heading))));
}
return marker;
}
protected void updateMarker(GoogleMap map) {
if (marker != null) {
rotateIcon();
marker.setPosition(location);
} else {
getMarker(map);
}
private void rotateIcon() {
marker.setIcon(BitmapDescriptorFactory.
fromBitmap(BusMarkerImageFactory.getMarkerIcon(heading)));
}
This is from a system that draws buses with the markers pointing in the direction they are heading, so of course, your code will be different, but the concept is very similar. Instead of rebuilding the entire marker you're keeping a reference to it somewhere and then simply resetting the icon.
Of course, drawing all those bitmaps for minor changes is a drain on memory. I used a flyweight pattern in the (incorrectly named) BusMarkerImageFactory to keep 16 images for 16 possible heading ranges. It is a static class that simply takes in the heading and returns the image that I've mapped to that range.
can't you use addMarker(new MarkerOptions()) method ?
If you need a custom marker you can create an implementation of InfoWindowAdapter and use that implementation like mMap.setInfoWindowAdapter(new CustomInfoWindowAdapter());
here is the documentation for InfoWindowAdapter