android-mapview

Sometimes when trying to get the Latitude span or Longitude span of a mapview with getLatitudeSpan() and getLongitudeSpan() I get 0 and 360*1E6 respectively. This doesn't happen always but it is a problem, has anybody got this problem? Any workarounds? I tried using getProjection() too but I get the same problem. Here is the piece of code: MapView mapView = (MapView) findViewById(R.id.mapview); int lat = mapView.getLatitudeSpan(); // sometimes returns 0 int long = mapView.getLongitudeSpan(); // sometimes returns 360*1E6 I would detect the condition and schedule your work to try again after a

I have a RelativeLayout that has a 9-patch background image. The image is a simple speech bubble with a perfectly centered "arrow" at the bottom middle. The RelativeLayout is inflated and placed on a MapView. Using the emulator, the speech bubble can be easily pointed to a location and will expand to its contents (text, an image, or both). When I run my app on a phone however, the 9-patch doesn't stretch properly. The "arrow" for the speech bubble will be offset to the left by a very noticeable amount. I primarily test on a Nexus S, but also a Samsung Captivate and Nexus One. Targeting SDK 7.

I am creating an application which trakcs down users path on a mapview. What I want to achieve when user takes a left turn for instance map should rotate it self in such a way that the head of the mapview should always point to upward direction. I hope that makes sense. I came across Mr. Romain Guy's post an he says I have done this in the past and it requires to create a custom ViewGroup that rotates the Canvas in the dispatchDraw() method. You also need to increase the size of the MapView (so that it draws enough pixels when rotated.) You will also need to rotate the touch events in

Say I have mapview control in my Android app. If I know a landmark exists at a certain latitude and longitude, how can I determine if that landmark is currently viewable on the user's screen? Is there a method for getting the coordinates for the top left and bottom right corners of the visible area? skyman You can project GeoPoint to Point and check if it is box (0, screen width) by (0, screen height) See: https://developer.android.com/reference/com/google/android/gms/maps/Projection.html Something like this will do the trick. private boolean isCurrentLocationVisible() { Rect

I use that Google Maps component MapView in an Android application. I can use the GPS location to show my location with a dot. But I would like to show an arrow instead, that points out the driving direction (bearing). I think that I can use the bearing value to get the angle of the arrow. How can I do that? pheelicks Assuming you've got the Location then obtain the bearing by doing: float myBearing = location.getBearing(); To implement the overlay you'll be using ItemizedOverlay and OverlayItem . You'll need to subclass OverlayItem to add the functionality to rotate the Drawable. Something