Hi,

I was looking towards capturing the latitude and longitude of any point I click on a map in my application.

setOnClickListener() / onTouchEvent() do not work. They are not fired when i click on the map.

onTap() dint really prove to be useful as i need to capture clicks ANYWHERE on the map.

I could not figure out how to override

Hope someone helps me out with this

Thanks,
Immanuel

immanueln2005 wrote:Hi,

I was looking towards capturing the latitude and longitude of any point I click on a map in my application.

setOnClickListener() / onTouchEvent() do not work. They are not fired when i click on the map.

onTap() dint really prove to be useful as i need to capture clicks ANYWHERE on the map.

I could not figure out how to override

Hope someone helps me out with this

Thanks,
Immanuel

hi

i am not sure. But you may try this code in your application

@Override
public void onCreate(Bundle icicl){
.............
.............
OnTouchListener myOnTouchListener=new OnTouchListener(){
public boolean onTouch(View mapView,MotionEvent m){
int action=m.getAction();
switch(action){
case MotionEvent.ACTION_UP:
int x=(int)m.getX();
int y=(int)m.getY();
double latspan=(myMapView.getLatitudeSpan()/1.0E6);
double lngspan=(myMapView.getLongitudeSpan()/1.0E6);
GeoPoint center=myMapView.getMapCenter();
double xpcent=(x/(double)myMapView.getWidth());
double ypcent=(y/(double)myMapView.getHeight());
double lat0=(center.getLatitudeE6()/1.0E6+(latspan/2.0));
double lng0=(center.getLongitudeE6()/1.0E6-(lngspan/2.0));
double lat=lat0-(ypcent*latspan);
double lng=lng0+(xpcent*lngspan);
Log.i("x=",""+x);
Log.i("y=",""+y);
GeoPoint newpoint=new GeoPoint((int)(lat*1E6),(int)(lng*1E6));
// myMapView.getController().zoomOut();

Log.i("Map","Height"+myMapView.getHeight());
Log.i("Map","width"+myMapView.getWidth());
Log.i("Current","LatitudeSpane"+myMapView.getLatitudeSpan());
Log.i("Current","LongitudeSpan"+myMapView.getLongitudeSpan());
Log.i("center Longitude","is"+newpoint.getLongitudeE6());
Log.i("center","Latitude is"+newpoint.getLatitudeE6());
Log.i("new ","latitude "+lat);
Log.i("new","longitude "+lng);


Log.i("background","is"+myMapView.getBackground());
Log.i("Zoom in","works");

myMapView.invalidate();
mc.animateTo(newpoint);

mc.zoomIn();

break;

}
return true;
}
};
myMapView.setOnTouchListener(myOnTouchListener);
......
.....
}

Regards
Sridhar.S

Thanks a lot..

I'll just check out and let you know.

Regards,
Immanuel

Works wonderful... Just what i wanted...

Thanks sridhar...

Facing a new problem... not able to move the map using mouse..
My intention was to allow the user to choose/set a location.

I'll try finding it out... Do let me know if there's an easy solution..

Thanks again..

Shouldn't you just call MapView.setClickable(true)?? Won't that fix both of your questions?

MrSnowflake wrote:Shouldn't you just call MapView.setClickable(true)?? Won't that fix both of your questions?

It is set as clickable...

What actually happens in the code provided by sridhar is, he zoom's into the selected geopoint, and disabling my map controls..

I am also facing the same problem. If you find out the answer please tell me.

How about creating an overlay and then using the onTap() method of it to get the GeoPoint?

Something like:
public class ClickGeoPoint extends Overlay{
BitmapDrawable bmp;
private Context context;

public ClickGeoPoint(Drawable d, Point p, Context _context) {
context = _context;
bmp = (BitmapDrawable) d;
}

@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
bmp.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
bmp.setAlpha(0);
bmp.draw(canvas);
}

@Override
public boolean onTap(GeoPoint p, MapView mapView) {
Toast.makeText(context, p.toString(), Toast.LENGTH_SHORT).show();
return true;
}

}

redtalonn wrote:How about creating an overlay and then using the onTap() method of it to get the GeoPoint?

Something like:
public class ClickGeoPoint extends Overlay{
BitmapDrawable bmp;
private Context context;

public ClickGeoPoint(Drawable d, Point p, Context _context) {
context = _context;
bmp = (BitmapDrawable) d;
}

@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
bmp.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
bmp.setAlpha(0);
bmp.draw(canvas);
}

@Override
public boolean onTap(GeoPoint p, MapView mapView) {
Toast.makeText(context, p.toString(), Toast.LENGTH_SHORT).show();
return true;
}

}

Hi,
i am not fully clear about your doubt. Anyway you go througth the following link. it is very useful for you.

http://blog.pocketjourney.com/2008/03/1 ... oogle-map/

in this tutorial they show how to draw overlay and the onTap functionalities.

Regards
Sridhar.S

immanueln2005 wrote:Works wonderful... Just what i wanted...

Thanks sridhar...

Facing a new problem... not able to move the map using mouse..
My intention was to allow the user to choose/set a location.

I'll try finding it out... Do let me know if there's an easy solution..

Thanks again..

Hi immanueln

in your code you just set the return value as false. Then you can move the map using mouse.

OnTouchListener myOnTouchListener=new OnTouchListener(){
public boolean onTouch(View mapView,MotionEvent m){
int action=m.getAction();
switch(action){
case MotionEvent.ACTION_UP:
........
........
break;

}
return false;
}
};

Just what I wanted...

Thanks a lot for gettin back sridhar..

I know this thread is a few months old but I am trying to implement the same solution you are. When I return false at the end of onTouch the case for ACTION_UP never gets called. If I return false it does.