我在 OpenStreetMaps 应用程序中遇到了 MyCurrentPosition 问题。我已经使用 OSMdroid 3.0.9 库创建了该应用程序。问题是关于当前位置。问题似乎与捏放大/缩小有关。它仅在捏屏幕时向我显示 GPS 或网络提供商的正确当前位置。当我释放它时，它会改变我当前的位置与附近的另一个位置，但不是真正的一个位置。我在下面给你我的代码，让你一睹为快：
MainActivity.java
public class MainActivity extends Activity {
private MapView map;
private MapController mapController;
private MyLocationOverlay miLocalizacion;
private LocationManager locManager;
private LocationListener locListener;
private Button pruebas;
private Location actual;
private GeoPoint punto;
private double mLatitude, mLongitude;
private Button candado;
private OnItemGestureListener<OverlayItem> myOnItemGestureListener;
public static Resources res;
private ArrayList<OverlayItem> overlayItemArray;
final private String MAP_DEFAULT_STARTPOSITION = "Santander";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_ACTION_BAR);
setContentView(R.layout.activity_main);
overlayItemArray = new ArrayList<OverlayItem>();
candado = (Button)findViewById(R.id.button2);
map = (MapView)findViewById(R.id.openmapview);
map.setBuiltInZoomControls(true);
map.setMultiTouchControls(true);
map.setTileSource(TileSourceFactory.MAPNIK);
mapController = new MapController(map);
mapController = map.getController();
mapController.setZoom(15);
candado.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
}
});
LocationManager locManager = (LocationManager)getSystemService(LOCATION_SERVICE);
actual = locManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
locListener = new LocationListener() {
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
}
@Override
public void onProviderEnabled(String arg0) {
}
@Override
public void onProviderDisabled(String arg0) {
}
@Override
public void onLocationChanged(Location loc) {
ActualizarPosicion(loc);
mLatitude = (int) (loc.getLatitude() * 1E6);
mLongitude = (int) (loc.getLongitude() * 1E6);
}
};
locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
locManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locListener);
miLocalizacion = new MyLocationOverlay(getBaseContext(), map);
map.getOverlays().add(miLocalizacion);
//Mi ubicación
miLocalizacion.runOnFirstFix(new Runnable() {
public void run() {
map.getController().animateTo(miLocalizacion.getMyLocation());
}
});
res = getResources();
//Minimapa
MinimapOverlay miniMapOverlay = new MinimapOverlay(this, map.getTileRequestCompleteHandler());
miniMapOverlay.setZoomDifference(5);
miniMapOverlay.setHeight(200);
miniMapOverlay.setWidth(200);
map.getOverlays().add(miniMapOverlay);
myOnItemGestureListener = new OnItemGestureListener<OverlayItem>() {
@Override
public boolean onItemLongPress(int arg0, OverlayItem arg1) {
Toast.makeText(getBaseContext(), "Pulsacion larga", Toast.LENGTH_SHORT).show();
return false;
}
@Override
public boolean onItemSingleTapUp(int arg0, OverlayItem arg1) {
Toast.makeText(getBaseContext(), "Pulsacion corta", Toast.LENGTH_SHORT).show();
return false;
}
};
overlayItemArray.add(new OverlayItem("Hola", "Estás aquí.", new GeoPoint(actual.getLatitude(), actual.getLongitude())));
ItemizedOverlayWithFocus<OverlayItem> anotherItemizedIconOverlay = new ItemizedOverlayWithFocus<OverlayItem>(this, overlayItemArray, myOnItemGestureListener);
map.getOverlays().add(anotherItemizedIconOverlay);
anotherItemizedIconOverlay.setFocusItemsOnTap(true);
anotherItemizedIconOverlay.setFocusedItem(0);
//Botón de pruebas
pruebas = (Button)findViewById(R.id.button1);
pruebas.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Toast.makeText(getBaseContext(), actual.getLatitude() + " , " + actual.getLongitude(), Toast.LENGTH_SHORT).show();
}
});
protected void PonerMarcador(Location loc) {
overlayItemArray.add(new OverlayItem("Hola", "Estás aquí.", new GeoPoint(actual.getLatitude(), actual.getLongitude())));
ItemizedOverlayWithFocus<OverlayItem> anotherItemizedIconOverlay = new ItemizedOverlayWithFocus<OverlayItem>(this, overlayItemArray, myOnItemGestureListener);
map.getOverlays().add(anotherItemizedIconOverlay);
anotherItemizedIconOverlay.setFocusItemsOnTap(true);
}
protected void ActualizarPosicion(Location loc) {
actual.setLatitude(loc.getLatitude());
actual.setLongitude(loc.getLongitude());
mapController.animateTo(actual.getLatitude(),actual.getLongitude());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Se lanza el menú, codigo para la action bar, iconos etc..
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private void setOverlayLoc(Location overlayloc){
GeoPoint overlocGeoPoint = new GeoPoint(overlayloc);
overlayItemArray.clear();
OverlayItem newMyLocationItem = new OverlayItem("My Location", "My Location", overlocGeoPoint);
overlayItemArray.add(newMyLocationItem);
}
private class MyItemizedIconOverlay extends ItemizedIconOverlay<OverlayItem>{
public MyItemizedIconOverlay(
List<OverlayItem> pList,
org.osmdroid.views.overlay.ItemizedIconOverlay.OnItemGestureListener<OverlayItem> pOnItemGestureListener,
ResourceProxy pResourceProxy) {
super(pList, pOnItemGestureListener, pResourceProxy);
}
@Override
public void draw(Canvas canvas, MapView mapview, boolean arg2) {
super.draw(canvas, mapview, arg2);
if(!overlayItemArray.isEmpty()){
//overlayItemArray have only ONE element only, so I hard code to get(0)
GeoPoint in = overlayItemArray.get(0).getPoint();
Point out = new Point();
mapview.getProjection().toPixels(in, out);
Bitmap bm = BitmapFactory.decodeResource(getResources(),
R.drawable.ic_launcher);
canvas.drawBitmap(bm,
out.x - bm.getWidth()/2, //shift the bitmap center
out.y - bm.getHeight()/2, //shift the bitmap center
null);
}
}
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearlayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pruebas" />
<Button
android:id="@+id/button2"
android:layout_width="62dp"
android:layout_height="wrap_content"
android:layout_weight="0.13" />
</LinearLayout>
<org.osmdroid.views.MapView
android:id="@+id/openmapview"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</org.osmdroid.views.MapView>