我设法用它来编写一个Android应用程序来跟踪用户位置并使用标记在地图上显示它。以下是相关代码:
public class MainActivity extends Activity implements LocationListener {
public MapView mapView;
private LocationManager locationManager;
MyItemizedOverlay myItemizedOverlay = null;
Drawable marker;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mapView = (MapView) this.findViewById(R.id.mapview);
mapView.setUseDataConnection(false);
mapView.setClickable(true);
mapView.setBuiltInZoomControls(true);
mapView.setMultiTouchControls(true);
mapView.setUseDataConnection(false);
mapView.setFocusable(true);
mapView.setFocusableInTouchMode(true);
mapView.getController().setZoom(16); // set initial zoom-level, depends
// on your need
marker = getResources().getDrawable(android.R.drawable.star_on);
int markerWidth = 1;
int markerHeight = 1;
marker.setBounds(0, markerHeight, markerWidth, 0);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, this); // You can also use LocationManager.GPS_PROVIDER and
// LocationManager.PASSIVE_PROVIDER
}
@Override
public void onLocationChanged(Location location) {
int lat = (int) (location.getLatitude() * 1E6);
int lng = (int) (location.getLongitude() * 1E6);
GeoPoint point = new GeoPoint(lat, lng);
mapView.getController().setCenter(point);
mapView.getController().animateTo(point);
mapView.invalidate();
ResourceProxy resourceProxy = new DefaultResourceProxyImpl(
getApplicationContext());
myItemizedOverlay = new MyItemizedOverlay(marker, resourceProxy);
mapView.getOverlays().clear();
mapView.getOverlays().add(myItemizedOverlay);
myItemizedOverlay.addItem(point, "myPoint1", "myPoint1");
TextView tv1 = (TextView) findViewById(R.id.myLat);
tv1.setText("Lat is " + lat);
TextView tv2 = (TextView) findViewById(R.id.myLong);
tv2.setText("Long is " + lng);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
现在我需要一种获取地图上点击位置的纬度和经度属性的方法。 我的意思是我需要类似于osmdroid中的以下代码(谷歌地图api中存在)。
google.maps.event.addListener(map, 'click', function(event) {
YourHandler(event.latLng);});
答案 0 :(得分:3)
您必须创建Overlay
并覆盖onSingleTapConfirmed
。
试试这个:
Overlay touchOverlay = new Overlay(this){
ItemizedIconOverlay<OverlayItem> anotherItemizedIconOverlay = null;
@Override
protected void draw(Canvas arg0, MapView arg1, boolean arg2) {
}
@Override
public boolean onSingleTapConfirmed(final MotionEvent e, final MapView mapView) {
final Drawable marker = getApplicationContext().getResources().getDrawable(R.drawable.markericon);
Projection proj = mapView.getProjection();
GeoPoint loc = (GeoPoint) proj.fromPixels((int)e.getX(), (int)e.getY());
String longitude = Double.toString(((double)loc.getLongitudeE6())/1000000);
String latitude = Double.toString(((double)loc.getLatitudeE6())/1000000);
System.out.println("- Latitude = " + latitude + ", Longitude = " + longitude );
ArrayList<OverlayItem> overlayArray = new ArrayList<OverlayItem>();
OverlayItem mapItem = new OverlayItem("", "", new GeoPoint((((double)loc.getLatitudeE6())/1000000), (((double)loc.getLongitudeE6())/1000000)));
mapItem.setMarker(marker);
overlayArray.add(mapItem);
if(anotherItemizedIconOverlay==null){
anotherItemizedIconOverlay = new ItemizedIconOverlay<OverlayItem>(getApplicationContext(), overlayArray,null);
mapView.getOverlays().add(anotherItemizedIconOverlay);
mapView.invalidate();
}else{
mapView.getOverlays().remove(anotherItemizedIconOverlay);
mapView.invalidate();
anotherItemizedIconOverlay = new ItemizedIconOverlay<OverlayItem>(getApplicationContext(), overlayArray,null);
mapView.getOverlays().add(anotherItemizedIconOverlay);
}
// dlgThread();
return true;
}
};
mapView.getOverlays().add(touchOverlay);
答案 1 :(得分:0)
如果您实施MapEventsReceiver
,则可以使用singleTapConfirmedHelper()
函数直接为您提供所点击位置的GeoPoint
对象。这是一个例子:
public class MapActivity extends AppCompatActivity implements MapEventsReceiver {
...
@Override
public boolean singleTapConfirmedHelper(GeoPoint p) {
mapController.animateTo(p);
return true;
}
}