如何通过使用Google Maps获取用户当前位置并在android中放置标记

Question

i develop the application that has Google API so i can put map in my app i have problem in get user Current location, i want : when the user open map Activity it display the map and marker on her location.i already doing google API stuff but i faced problem with USER CURRENT LOCATION AND MARKER ON IT. this is my code(it is shows me in ocean !!): alert.setButton2("get an address", new DialogInterface.OnClickListener() {

                        public void onClick(DialogInterface dialog,
                                int which) {
                            // TODO Auto-generated method stub
                            Geocoder geocoder = new Geocoder(
                                    getBaseContext(), Locale.getDefault());

                            try {
                                List<Address> address = geocoder.getFromLocation(touchedPoint.getLatitudeE6() / 1E6,touchedPoint.getLatitudeE6() / 1E6,1);
                                OverlayItem overlayItem = new OverlayItem( touchedPoint, "Whats up", "2nd String");
                                CustomPinpoint custom = new CustomPinpoint(d,MapsActivity.this);
                                custom.insertPinpoint(overlayItem);
                                overlaylist.add(custom);
                                if (address.size() > 0) {
                                    String display = "";
                                    for (int i = 0; i < address.get(0)
                                            .getMaxAddressLineIndex(); i++) {
                                        display += address.get(0)
                                                .getAddressLine(i) + "\n";
                                    }

                                    Toast t = Toast.makeText(
                                            getBaseContext(), display,
                                            Toast.LENGTH_LONG);
                                    t.show();

                                }
                            } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            } finally {
                            }
                        }
                    });

i Have a nightmare about Map, PLEASE FIX MY CODE

Answer 1

please check below example

1) http://eagle.phys.utk.edu/guidry/android/mapOverlayDemo.html

2) http://androidmyway.wordpress.com/2012/02/26/map-marker-dragging

in second one you can check how to get address.

Thank You

Answer 2

if you just want to show users current location you could use MyLocationOverlay class in mapactivity. it will draw the marker on the location itself.