Hi I am working on google maps and more specifically on setting some markers when the user clicks on the map. The problem is that whenever I re-run the activity or re-compile the application the markers disappear from the map. Any advice on that. Please help. Thank you
Here is my code where the markers are created on the onmapclick event.
gMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
#Override
public void onMapClick(LatLng position) {
gMap.addMarker(new MarkerOptions().position(position)
.title("BAR")
.snippet("DRINKS")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
}
});
}
Think of Markers as you think of of Android Views. If you re-run the application, user and password EditTexts that were previously entered are not filled anymore.
Use some kind of persistance to achive it. Check out your storage options here.
Related
I am working with Google Maps Android API V2.
When my map fragment is loaded it shows my location automatically (with the blue dot). Why does this happen? Is my location history affecting or is the default working mode?
Does this code cause it?:
googleMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
#Override
public void onMyLocationChange(Location location) {
googleMap.setOnMyLocationChangeListener(null);
}
});
I have commented this piece of code but the map is still showing the blue dot.
If this is not happening because of the history, would this piece of code be enough to get user location or do I need to use LocationManager class as described in other questions?
Try to use
googleMap.setMyLocationEnabled(true/false);
to control showing your location on map. I think it is enough to turn the setting on to make your location work with Google Maps, without need to use LocationManager etc.
I am an android fresh man and developing a small app with Google Map V2.
I want to get the WGS84 (i.e. LatLng)position when longpress on the MAP.
Several methods are tried as the answers in other topic but the longpress guesture still could not be detected.
Can anyone help on this to provide some sample code for me?
Have you tried this?
mMap.setOnMapLongClickListener(new OnMapLongClickListener() {
#Override
public void onMapLongClick(final LatLng point) {
}
});
I'm using Google Maps v2 in an Android application that I'm writing. After creating the map and adding all the markers to it, I make all the markers draggable by using marker.setDraggable(true); for each marker on the map.
If I run the code like this, the markers are indeed draggable. However, I'd like to change the icon or color of the marker while it's being dragged, so I set up an OnMarkerDragListener, like so:
map.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() {
#Override
public void onMarkerDragStart(Marker marker) {
marker.setIcon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE));
}
#Override
public void onMarkerDrag(Marker marker) {
}
#Override
public void onMarkerDragEnd(Marker marker) {
marker.setIcon(BitmapDescriptorFactory.defaultMarker());
}
});
After adding in that block of code, though, the markers are no longer draggable. The color successfully changes in both the onMarkerDragStart and onMarkerDragEnd methods, but that's it. Can anyone explain what I'm doing wrong here, and why the markers aren't getting dragged ?
i would say that the problem comes from changing the icon rather than from settings the listener.
Please note that Marker.setIcon is not a function that is available in all the versions of the GoogleMaps V2 API. This means that probably it is not available in the library you have, or in the version of the play services installed in the device in which you are trying your app, and that could be causing any kind of malfunction.
As you can read here that function was added in May 2013. Please try updating everything, the google-play-services_lib, and the play services installed in the device.
If this happen to fix it, then you can try to change the icon only depending on the version installed on the mobile.
The default behavior for an InfoWindow is to hide if the map the marker is in, or the marker itself are tapped.
Is there any way to make the InfoWindow permanent so you can't hide it?
I have disabled all gestures in the map, but the InfoWindow still disappears when you tap.
visceralG's solution is what I would do in the first place, but there is also (untested) alternative:
keep a reference to marker showing info window (from getInfoContents)
in onMapClick call markerShowingInfoWindow.showInfoWindow() to force it back
if the above doesn't work, put markerShowingInfoWindow.showInfoWindow() inside Runnable.run() and post it with Handler or View
Not that I'm aware of. You're best bet is to create your own custom icon for the map marker that includes a drawn "infoWindow." It will then require some custom drawing on the infoWindow section of the icon bitmap to produce the same effect as a normal infoWindow, but it's not too terrible to pull off. Not quite as easy as the solution you were looking for, but it'll get you where you were wanting to go. Hope that helps!
Assuming that you already know how to setup info windows, these lines will make your infoWindow, for any one marker, permanent:
final Marker myMarker = mGoogleMap.addMarker(mDriverMarker);
myMarker.showInfoWindow();
mGoogleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
#Override
public void onMapClick(LatLng latLng) {
myMarker.showInfoWindow();
}
});
mGoogleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
#Override
public boolean onMarkerClick(Marker marker) {
myMarker.showInfoWindow();
return true;
}
});
I have a fully working GoogleMap and I can show my userlocation with the call
mMap.setMyLocationEnabled(true);
What I want to accomplish is the functionality of the actual click on the button that now appears on the GoogleMap (I.e animating the map to the userlocation with correct zoom etc).
The functionality is there in the GoogleMap-object already, how do I use it?
I do not want to use a LocationListener or such to accomplish this, I just want to "call the same code" that gets called when I click the button on the map. Can it be that simple?
Thanks in advance.
EDIT:
What I basically want to do is to center the map at the user location, exactly the way that the GoogleMap centers at user location when I click the button. Like this:
GoogleMap mMap = this.getMap();
if(mMap != null) {
mMap.setMyLocationEnabled(true);
//TODO center the map on mylocation
}
EDIT:
Apparently Google is working on this. http://code.google.com/p/gmaps-api-issues/issues/detail?id=4644
This is how I do to navigate to the center of the map when we get the first location-update.
my class header:
public class FragActivity extends SherlockFragmentActivity implements OnMyLocationChangeListener
private GoogleMap mMap;
my mMap-setup:
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = customMapFragment.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null)
setUpMap();
}
setUpMap-method:
private void setUpMap() {
mMap.setMyLocationEnabled(true);
mMap.setOnMyLocationChangeListener(this);
}
and my onlocationchange:
#Override
public void onMyLocationChange(Location lastKnownLocation) {
CameraUpdate myLoc = CameraUpdateFactory.newCameraPosition(
new CameraPosition.Builder().target(new LatLng(lastKnownLocation.getLatitude(),
lastKnownLocation.getLongitude())).zoom(6).build());
mMap.moveCamera(myLoc);
mMap.setOnMyLocationChangeListener(null);
}
Works like a charm
Not really sure why the other answers are talking about OnMyLocationChangeListeners. This is not what was asked in the OP. What was asked was how to replicate the exact behavior of clicking on the MyLocationButton, which is actually more complex than just animating the camera to the user's location. The button does different things depending on what zoom level you're currently on.
For example, when you're zoomed way out, clicking the button will animate you to your location while zooming you in, whereas if you're already at certain zoom levels, clicking the button will only animate you to your location while maintaining the current zoom level.
Rather than painstakingly trying to replicate this behavior, wouldn't it be great if we could simply get a reference to the MyLocationButton and just, you know, click it? Well, this is the current best way I've found to do just that:
#OnClick(R.id.fabMyLocation)
public void onMyLocationClick(FloatingActionButton fabMyLocation) {
View myLocationButton = ((View) mapFragment.getView().findViewById(Integer.parseInt("1")).getParent())
.findViewById(Integer.parseInt("2"));
myLocationButton.performClick();
}
Yeah, it's not pretty, and relies on hardcoded IDs that may change in future versions of the Google Maps API. But this method of retrieving the button is based off of this highly rated answer from 2013 and so far, as of Google Play Services 8.4.0, still works flawlessly.
Update February 2013:
This is now possible. You can now set the map's OnMyLocationChangeListener. Receive an update as you want and move the camera accordingly.
This is not possible. I've found that the GoogleMap in Android is quite limited in the information that it gives you. It simply doesn't give you direct access to the user location updates or to the button that the user can press (you can only enable/disable it, not simulate a press).
You must implement the LocationSource and LocationListener interfaces and use a LocationManager to get updates from the device and use them to send them to the map.
You could then add your own custom button to the overlay to replicate the default button and use your own camera and zoom controls to simulate the functionality.
Source: hours of searching