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PONot able to draw a circle around my current location in map
 

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  1. PONot able to draw a circle around my current location in map
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    <p>I am trying to show my current location in map along with the address. Below code works fine but somehow i am not able to draw or point a circle around my current location.Any help would be appreciated.I am using the old API.</p> <p>This is my main class.</p> <pre><code> public class GMapsActivity extends MapActivity implements LocationListener { private static final String TAG = "LocationActivity"; private static GMapsActivity instance; private MapView mapView; protected LocationManager locationManager; public Button retrieveLocationButton; Geocoder geocoder; TextView locationText; Location location; MapController mapController; CountDownTimer locationtimer; // private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters // private static final long MINIMUM_TIME_BETWEEN_UPDATES = 9000; // in Milliseconds // MapOverlay mapOverlay = new MapOverlay(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_gmaps); mapView = (MapView) findViewById(R.id.map_view); mapView.setBuiltInZoomControls(true); locationText = (TextView)this.findViewById(R.id.lblLocationInfo); mapController = mapView.getController(); mapController.setZoom(13); retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button); } public void showcurrentlocation(View view) { geocoder = new Geocoder(GMapsActivity.this); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); mapView.getOverlays().add(new CircleOverlay(this, location.getLatitude(),location.getLongitude(),325)); if (location != null) { Log.d(TAG, location.toString()); this.onLocationChanged(location); //&lt;6&gt; } } @Override public void onLocationChanged(Location location) { Log.d(TAG, "onLocationChanged with location " + location.toString()); String text = String.format("Lat:\t %f\nLong:\t %f\nAlt:\t %f\nBearing:\t %f", location.getLatitude(),location.getLongitude(), location.getAltitude(), location.getBearing()); this.locationText.setText(text); try { List&lt;Address&gt; addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 10); //&lt;10&gt; for (Address address : addresses) { this.locationText.append("\n" + address.getAddressLine(0)); } int latitude = (int)(location.getLatitude() * 1000000); int longitude = (int)(location.getLongitude() * 1000000); GeoPoint point = new GeoPoint(latitude,longitude); mapController.animateTo(point); //&lt;11&gt; } catch (IOException e) { Log.e("LocateMe", "Could not get Geocoder data", e); } } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status,Bundle extras) { // TODO Auto-generated method stub } // @Override protected void onResume() { // LocationListener locationListener = new LocationListener(){ // super.onResume(); // locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10, this); //&lt;7&gt; // } // @Override protected void onPause() { // super.onPause(); // locationManager.removeUpdates(this); //&lt;8&gt; // // } @Override protected boolean isRouteDisplayed() { return false; } } </code></pre> <p>Below is my circle class.</p> <pre><code>import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Point; import android.util.FloatMath; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapView; import com.google.android.maps.Overlay; import com.google.android.maps.Projection; public class CircleOverlay extends Overlay { Context context; double mLat; double mLon; float mRadius; public CircleOverlay(Context _context, double _lat, double _lon, float radius ) { context = _context; mLat = _lat; mLon = _lon; mRadius = radius; } public void draw(Canvas canvas, MapView mapView, boolean shadow) { super.draw(canvas, mapView, shadow); if(shadow) return; // Ignore the shadow layer Projection projection = mapView.getProjection(); Point pt = new Point(); GeoPoint geo = new GeoPoint((int) (mLat *1e6), (int)(mLon * 1e6)); projection.toPixels(geo ,pt); float circleRadius = projection.metersToEquatorPixels(mRadius) * (1/ FloatMath.cos((float) Math.toRadians(mLat))); Paint innerCirclePaint; innerCirclePaint = new Paint(); innerCirclePaint.setColor(Color.BLUE); innerCirclePaint.setAlpha(25); innerCirclePaint.setAntiAlias(true); innerCirclePaint.setStyle(Paint.Style.FILL); canvas.drawCircle((float)pt.x, (float)pt.y, circleRadius, innerCirclePaint); } } </code></pre>
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