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我正在使用下面的代碼來顯示當前位置的標記...但是當我改變設備標記的方向消失..?谷歌地圖的標記(覆蓋)消失,同時改變設備的方向
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = Activity.this.getResources().getDrawable(R.drawable.icon);
MyItemizedOverlay itemizedOverlay = new MyItemizedOverlay(drawable ,Activity.this);
GeoPoint point = new GeoPoint((int)(location.getLatitude()*1000000),
(int)(location.getLongitude()*1000000));
OverlayItem overlayitem = new OverlayItem(point, "Current Location :","+acTextView.getText());
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
MapController mapController = mapView.getController();
mapController.animateTo(point);
mapController.setZoom(14);
如何處理mapview中的方向..?