我想从地址显示自己的位置是由用户使用 LocationOverlay 输入的，并通过一个小点或任何图标显示位置....（例如：可以通过 flag.png 显示这个位置）但现在我不知道如何在地图上显示。你能帮帮我吗！
源代码：
public class Main extends MapActivity implements LocationListener {
private static double lat;
private static double lon;
private MapController mapControl;
private MapView mapView;
LocationManager locman;
Location loc;
String provider = LocationManager.GPS_PROVIDER;
String TAG = "GPStest";
Bundle locBundle;
private int numberSats = -1;
private float satAccuracy = 2000;
private float bearing;
private double altitude;
private float speed;
private String currentProvider;
private TextView txt;
private double lat1;
private double lon1;
private Drawable marker;
private Geocoder gcoder;
private MyLocationOverlay me = null;
long GPSupdateInterval; // In milliseconds
float GPSmoveInterval; // In meters
private MyMyLocationOverlay myLocationOverlay;
private List<Overlay> mapOverlays;
public DisplayOverlay displayOverlay;
private EditText address;
Button test;
private Button btnMylocation;
private Button btnAddrress;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_long_van_map);
gps();
btnMylocation = (Button) findViewById(R.id.button1);
// get my location
btnMylocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
gps();
}
});
gcoder = new Geocoder(this);
me = new MyLocationOverlay(this, mapView);
address = (EditText) findViewById(R.id.editText1);
btnAddrress = (Button) findViewById(R.id.button2);
//Get postion from address
btnAddrress.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String add = address.getText().toString();
try {
List<Address> addresses = gcoder
.getFromLocationName(add, 1);
if (addresses == null) {
// return point;
}
// just get first item of list address
Address add2 = addresses.get(0);
lat1 = add2.getLatitude();
lon1 = add2.getLongitude();
} catch (IOException e) {
}
GeoPoint newPoint = new GeoPoint((int) (lat1 * 1e6),
(int) (lon1 * 1e6));
mapControl.animateTo(newPoint);
marker = getResources().getDrawable(R.drawable.startpoint);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),
marker.getIntrinsicHeight());
//mapView.getOverlays().add(new SitesOverlay(marker));
mapView.getOverlays().add(me);
}
});
}
//Info gps of me
public void gps() {
updateGPSprefs();
locman = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Listener for GPS Status...
final GpsStatus.Listener onGpsStatusChange = new GpsStatus.Listener() {
public void onGpsStatusChanged(int event) {
switch (event) {
case GpsStatus.GPS_EVENT_STARTED:
// Started...
break;
case GpsStatus.GPS_EVENT_FIRST_FIX:
// First Fix...
Toast.makeText(Main.this, "GPS has First fix",
Toast.LENGTH_LONG).show();
break;
case GpsStatus.GPS_EVENT_STOPPED:
// Stopped...
break;
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
// Satellite update
break;
}
//GpsStatus status = locman.getGpsStatus(null);
// Not presently doing anything with following status list for
// individual satellites
// Iterable<GpsSatellite> satlist = status.getSatellites();
}
};
locman.addGpsStatusListener(onGpsStatusChange);
locman.requestLocationUpdates(provider, GPSupdateInterval,
GPSmoveInterval, this);
Log.i(TAG, locman.toString());
// Add map controller with zoom controls
mapView = (MapView) findViewById(R.id.Mapview);
mapView.setSatellite(false);
mapView.setTraffic(false);
mapView.setBuiltInZoomControls(true); // Set android:clickable=true in
// main.xml
int maxZoom = mapView.getMaxZoomLevel();
int initZoom = (int) (0.95 * (double) maxZoom);
mapControl = mapView.getController();
mapControl.setZoom(initZoom);
// Set up compass and dot for present location map overlay
List<Overlay> overlays = mapView.getOverlays();
myLocationOverlay = new MyMyLocationOverlay(this, mapView);
overlays.add(myLocationOverlay);
// Set up overlay for data display
displayOverlay = new DisplayOverlay();
mapOverlays = mapView.getOverlays();
mapOverlays.add(displayOverlay);
txt = (TextView) findViewById(R.id.textView1);
txt.setText(LongVanMap.gettext());
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
// Called when location has changed
centerOnLocation();
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
locman.removeUpdates(this);
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
locman.requestLocationUpdates(provider, GPSupdateInterval,
GPSmoveInterval, this);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
centerOnLocation();
}
// Method to assign GPS prefs
public void updateGPSprefs() {
int gpsPref = Integer.parseInt(Prefs
.getGPSPref(getApplicationContext()));
switch (gpsPref) {
case 1:
GPSupdateInterval = 5000; // milliseconds
GPSmoveInterval = 1; // meters
break;
case 2:
GPSupdateInterval = 10000;
GPSmoveInterval = 100;
break;
case 3:
GPSupdateInterval = 125000;
GPSmoveInterval = 1000;
break;
}
}
}