android maps: How to Long Click a Map?

user_203181 0
Viewed 25986

How do I long click on a mapview so that a place marker appears at that point on the map?

I tried a couple ways without success:

1) Using setOnLongClickListener on the MapvView which never detected the longclicks.

2) My other idea was to extend MapView to override dispatchTouchEvent .. Create a GestureDetector to respond to longpress callback. But I was stuck midway here as I could not get a handle to my subclassed Mapview. i.e.

MyMapview mymapview; //MyMapView extends MapView

//results in a classcast exception
mymapView = (MyMapView) findViewById(R.id.map);

3) The only other way I know how to try this is: Detect a MotionEvent.ACTION_DOWN and post a delayed runnable to a handler and detect longpress if the two other events: acton_move or an action_up, have not happened.

Can someone provide thoughts on any of these methods to detect long presses?

long-click android-mapview android
8 Answers

ambrose,

I modified the demo of the library mapview-overlay-manager. to get this code running with a double tap gesture:

package de.android1.overlaymanager.demo;

import android.os.Bundle;
import android.widget.Toast;
import android.graphics.drawable.Drawable;
import android.view.MotionEvent;
import com.google.android.maps.MapActivity;

import com.google.android.maps.MapView;
import com.google.android.maps.MapController;
import com.google.android.maps.GeoPoint;

import de.android1.overlaymanager.*;


public class DemoView extends MapActivity {

    MapView mapView;
    MapController mapController;

    OverlayManager overlayManager;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mapView = (MapView) findViewById(R.id.mapview);
        mapView.setBuiltInZoomControls(true);
        mapController = mapView.getController();

        overlayManager = new OverlayManager(getApplication(), mapView);
    }

    @Override
    public void onWindowFocusChanged(boolean b) {

         createOverlayWithListener();

    }


    public void createOverlayWithListener() {
        //This time we use our own marker
        final ManagedOverlay managedOverlay = overlayManager.createOverlay("listenerOverlay", getResources().getDrawable(R.drawable.marker));
        for (int i = 0; i < 40; i = i + 3) {
            managedOverlay.createItem(GeoHelper.geopoint[i], "Item" + i);
        }
        managedOverlay.setOnOverlayGestureListener(new ManagedOverlayGestureDetector.OnOverlayGestureListener() {


            public boolean onZoom(ZoomEvent zoom, ManagedOverlay overlay) {
                return false;
            }


            public boolean onDoubleTap(MotionEvent e, ManagedOverlay overlay, GeoPoint point, ManagedOverlayItem item) {
                Drawable defaultmarker = getResources().getDrawable(R.drawable.marker);     

                ManagedOverlay managedOverlay = overlayManager.createOverlay(defaultmarker);

                //creating some marker:
                managedOverlay.createItem(point);

                //registers the ManagedOverlayer to the MapView
                overlayManager.populate();
                Toast.makeText(getApplicationContext(), "You created a Marker!", Toast.LENGTH_LONG).show();

                return true;
            }


            public void onLongPress(MotionEvent arg0, ManagedOverlay arg1) {
                // TODO Auto-generated method stub

            }


            public void onLongPressFinished(MotionEvent arg0,
                    ManagedOverlay arg1, GeoPoint arg2, ManagedOverlayItem arg3) {
                // TODO Auto-generated method stub

            }


            public boolean onScrolled(MotionEvent arg0, MotionEvent arg1,
                    float arg2, float arg3, ManagedOverlay arg4) {
                // TODO Auto-generated method stub
                return false;
            }


            public boolean onSingleTap(MotionEvent arg0, ManagedOverlay arg1,
                    GeoPoint arg2, ManagedOverlayItem arg3) {
                // TODO Auto-generated method stub
                return false;
            }           
        });
        overlayManager.populate();
    }


    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }
}

Hope it helps.

user_4168320
Related