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POOverlay not drawing on the right spot
 

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  1. POOverlay not drawing on the right spot
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    <p>I have an extremely weird issue.</p> <p>First of all, when I zoom in and out of a MapView, the marker (overlay) moves to incorrect places (doesn't work well with scaling).</p> <p>Secondly, the market is being drawn at the wrong position!</p> <p>I'll post code below but first listen to this:</p> <p>I'm in Islamabad. The GeoCoder also tells me I'm in Islamabad. But when I draw a circle around my location using overlays, it draws it in a city that's 100s of kilometers away.</p> <p>Kindly help me with both the problems.</p> <p>Here's the activity:</p> <pre><code>public class LocatePickup extends MapActivity implements LocationListener { Geocoder gc; MapView mapView; MapController mc; GeoPoint p; double lat = 0; double lng = 0; LocationManager lm; WebMethods wm; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.locate_pickup); mapView = (MapView) findViewById(R.id.mapView); mapView.setBuiltInZoomControls(true); mapView.setStreetView(true); lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000L, 500.0f, this); Location l = new Location(LocationManager.NETWORK_PROVIDER); l = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); mc = mapView.getController(); p = new GeoPoint((int) (l.getLatitude()), (int) (l.getLongitude())); mc.setCenter(p); mc.setZoom(14); MapOverlay myLocationOverlay = new MapOverlay(); List&lt;Overlay&gt; list = mapView.getOverlays(); list.add(myLocationOverlay); gc = new Geocoder(this); try { List&lt;Address&gt; address = gc.getFromLocation(l.getLatitude(), l.getLongitude(), 1); Toast.makeText(this, ""+address.get(0).getAddressLine(1), 1).show(); } catch (IOException e) { e.printStackTrace(); } } @Override protected boolean isRouteDisplayed() { return false; } class MapOverlay extends com.google.android.maps.Overlay { Paint paint = new Paint(); @Override public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { super.draw(canvas, mapView, shadow); Point myScreenCoords = new Point(); mapView.getProjection().toPixels(p, myScreenCoords); paint.setStrokeWidth(1); paint.setARGB(255, 218, 28, 28); paint.setStyle(Paint.Style.STROKE); //Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.pin); canvas.drawCircle(myScreenCoords.x, myScreenCoords.y, 15, paint); //(bmp, myScreenCoords.x, myScreenCoords.y - 256, paint); canvas.drawText("Hey!", myScreenCoords.x, myScreenCoords.y, paint); return true; } } @Override public void onLocationChanged(Location arg0) { if(arg0 != null) { Log.d("New Location: ", arg0.getLatitude() + " - " + arg0.getLongitude()); lat = arg0.getLatitude(); lng = arg0.getLongitude(); p = new GeoPoint((int) lat * 1000000, (int) lng * 1000000); mc.animateTo(p); } } @Override public void onProviderDisabled(String provider) { // empty } @Override public void onProviderEnabled(String provider) { // empty } @Override public void onStatusChanged(String provider, int status, Bundle extras) { //empty } } </code></pre> <p>Once the code is complete, I'd like the user to be able to tap a spot on the map and get its address (the marker should move to that spot as well). But it should be accurate.</p>
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