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POMapView adding pushpins on touch
 

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    <p>I managed to get the map shown on the screen. Now the user will move around the map and press on it. After pressing on a point I need to add a push pin on screen on the pressed location. If the user decides to go for another point, when pressing on the chosen point, the first pushpin would disapear and a new one will be drawn on the new location</p> <p>I did like this:</p> <pre><code>public class LocationSelectionActivity extends MapActivity { GeoPoint p; List&lt;Overlay&gt; listOfOverlays; MapOverlay mapOverlay; private MapView mapView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.locationselection); mapView = (MapView) findViewById(R.id.mapView); mapView.setSatellite(false); final MapController mc = mapView.getController(); String coordinates[] = {"46.540606", "22.454542"}; double lat = Double.parseDouble(coordinates[0]); double lng = Double.parseDouble(coordinates[1]); p = new GeoPoint( (int) (lat * 1E6), (int) (lng * 1E6)); mc.animateTo(p); mc.setZoom(10); ZoomControls zoomControls = (ZoomControls) findViewById(R.id.zoomcontrols); zoomControls.setOnZoomInClickListener(new View.OnClickListener() { public void onClick(View v) { mc.zoomIn(); } }); zoomControls.setOnZoomOutClickListener(new View.OnClickListener() { public void onClick(View v) { mc.zoomOut(); } }); //---Add a location marker--- mapOverlay = new MapOverlay(); listOfOverlays = mapView.getOverlays(); listOfOverlays.clear(); listOfOverlays.add(mapOverlay); mapView.invalidate(); } class MapOverlay extends com.google.android.maps.Overlay { @Override public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { super.draw(canvas, mapView, shadow); //---translate the GeoPoint to screen pixels--- Point screenPts = new Point(); mapView.getProjection().toPixels(p, screenPts); //---add the marker--- Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.map_flag); canvas.drawBitmap(bmp, screenPts.x, screenPts.y-48, null); return true; } @Override public boolean onTouchEvent(MotionEvent event, MapView mapView) { //---when user lifts his finger--- if (event.getAction() == 1) { GeoPoint p = mapView.getProjection().fromPixels( (int) event.getX(), (int) event.getY()); Toast.makeText(getBaseContext(), p.getLatitudeE6() / 1E6 + "," + p.getLongitudeE6() /1E6 , Toast.LENGTH_SHORT).show(); } return false; } } </code></pre> <p>This draws the initial pushpin (the map_flag resource). When clicking on the map I get the Toast with the coordonates... all is left to do is on a new click, erase the old pin and add a new one.</p> <p>But how to do it ?</p>
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