google-maps-android-api-2

Check if a latitude and longitude is within a circle

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What you basically need, is the distance between two points on the map: float[] results = new float[1]; Location.distanceBetween(centerLatitude, centerLongitude, testLatitude, testLongitude, results); float distanceInMeters = results[0]; boolean isWithin10km = distanceInMeters < 10000; If you have already Location objects: Location center; Location test; float distanceInMeters = center.distanceTo(test); boolean isWithin10km = distanceInMeters < 10000; Here is … Read more

How to update TileOverlay without a flicker?

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Would it be possible to load the upcoming tile image however have the visibility set to false? Tile.setVisible(false); Then when you want to change (after the upcoming tile has loaded), set the upcoming tile to be visible and the current tile to be invisible? CurrentTile.setVisible(false); NewTile.setVisible(true); This way the change all occurs within the same … Read more

Replace getMap with getMapAsync

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as in the official doc, get map async requires a callback; it’s there your “main entry point” for google maps stuff! public class MapPane extends Activity implements OnMapReadyCallback { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map_activity); MapFragment mapFragment = (MapFragment) getFragmentManager() .findFragmentById(R.id.map); mapFragment.getMapAsync(this); } @Override public void onMapReady(GoogleMap map) { // DO WHATEVER YOU … Read more

Animating markers on Google Maps v2

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Some Google engineers have provided a nice demo video with some elegant sample code about how to animate markers from a starting point to an ending point, for all various versions of Android: The relevant code is here: https://gist.github.com/broady/6314689 And a nice demo video of all of it in action. OLD DEPRECATED ANSWER BELOW In … Read more

Android app is crashing due to V/GoogleSignatureVerifier: Signature not valid

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This logcat warning is caused by a bug introduced in Google Play Services 9.x. It can be safely ignored, I don’t believe it causes a crash, so your crash may be caused by a different issue. The message should go away with a future update to play services. This issue has been acknowledged by an … Read more

How to get current Location in GoogleMap using FusedLocationProviderClient

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This is similar to my other answer here, updated to use the recently introduced FusedLocationProviderClient class. In order to use a FusedLocationProviderClient in conjunction with a Google Map: Wait until the Google Map is ready Request the Location permission at runtime if needed Request location updates once the permission is granted Update the Google Map … Read more

Android map marker color?

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Here is a method I am using to generate dynamic Hue colors for markers based on given String color. May be useful for someone 🙂 Marker melbourne = mMap.addMarker(new MarkerOptions().position(MELBOURNE) .icon(getMarkerIcon(“#ff2299”))); // method definition public BitmapDescriptor getMarkerIcon(String color) { float[] hsv = new float[3]; Color.colorToHSV(Color.parseColor(color), hsv); return BitmapDescriptorFactory.defaultMarker(hsv[0]); }

How to remove all the polylines from a map

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Keep track of the Polyline as you add it to the map: Polyline polyline = this.mMap.addPolyline(new PolylineOptions()…..); Then when you want to remove it: polyline.remove(); If you have lots of Polylines, just add them to a List as they are put on the map: List<Polyline> polylines = new ArrayList<Polyline>(); for(….) { polylines.add(this.mMap.addPolyline(new PolylineOptions()….)); } And … Read more

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