我正在尝试在两个不同的片段活动中使用两个不同的地图片段。根据 SupportMapFragment 设计，我将映射键保留在 Manifest 文件中应用程序属性的 META TAG 中。但是我的地图视图没有清除，它在第二个片段中显示与旧点相同的地图，即使我调用“getMap().clear()”。请建议
这工作正常，除非我不在单独的 Activity 中使用新的 MapFragment，如果我使用新的 MapFragment，它会采用相同的地图视图，因此地图视图不会清除。
代码 ：
地图片段
公共类 DisplayMapFragment 扩展 SupportMapFragment 实现 OnMarkerClickListener,OnInfoWindowClickListener {
View mMapViewContainer;
MapView mMapView;
private Utill utilClass = Utill.getInstance(false);
private View v;
private MapView mapView;
private GeoPoint p;
private MapController mc;
private String latstr = "";
private String lonstr = "";
private String name, address;
private double lat;
private double lng;
ArrayList<NearByItem> NearByList=new ArrayList<NearByItem>();
private LatLng mPosFija;
private ArrayList<Double> mlat, mlong;
private ViewGroup parent;
Utill utilclass=Utill.getInstance(false);
Bitmap bmp;
ImageView ivIcon;
StringBuilder sbc=new StringBuilder();
ProgressBar progressbar;
public ImageLoader imageLoader;
public DisplayMapFragment() {
super();
}
public static DisplayMapFragment newInstance(LatLng posicion) {
DisplayMapFragment frag = new DisplayMapFragment();
frag.mPosFija = posicion;
return frag;
}
@Override
public void onCreate(Bundle arg0) {
// TODO Auto-generated method stub
super.onCreate(arg0);
NearByList=NearByMapActivity.fltrdNearByLists;
imageLoader=new ImageLoader(this.getActivity().getApplicationContext());
}
@Override
public View onCreateView(LayoutInflater arg0, ViewGroup arg1, Bundle arg2) {
View v = super.onCreateView(arg0, arg1, arg2);
mlat = new ArrayList<Double>();
mlong = new ArrayList<Double>();
parent=arg1;
if(NearByMapActivity.fltrdNearByLists!=null && !NearByMapActivity.fltrdNearByLists.isEmpty())
NearByList.addAll(NearByMapActivity.fltrdNearByLists);
else
NearByList.addAll(Utill.NearbyList);
NearByMapActivity parentActivity = (NearByMapActivity) getActivity();
return v;
}
public class MyItemizedOverlay extends ItemizedOverlay<OverlayItem> {
private List<OverlayItem> items;
private Drawable marker;
public MyItemizedOverlay(Drawable defaultMarker) {
super(defaultMarker);
items = new ArrayList<OverlayItem>();
marker = defaultMarker;
}
@Override
protected OverlayItem createItem(int index) {
return items.get(index);
}
@Override
public int size() {
return items.size();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
boundCenterBottom(marker);
}
public void addItem(OverlayItem item) {
items.add(item);
}
public void populateNow() {
populate();
}
@Override
protected boolean onTap(int index) {
return true;
}
}
private void initMap() {
UiSettings settings = getMap().getUiSettings();
settings.setAllGesturesEnabled(true);
// settings.setMyLocationButtonEnabled(true);
settings.isZoomControlsEnabled();
getMap().setTrafficEnabled(true);
getMap().getMaxZoomLevel();
// getMap().setMyLocationEnabled(true);
if(NearByMapActivity.fltrdNearByLists!=null && !NearByMapActivity.fltrdNearByLists.isEmpty())
getMap().moveCamera(
CameraUpdateFactory.newLatLngZoom(
new LatLng(Double.parseDouble(NearByMapActivity.fltrdNearByLists.get(0).getLocationLat()),
Double.parseDouble(NearByMapActivity.fltrdNearByLists.get(0).getLocationLong())), 14));
getMap().isTrafficEnabled();
// getMap().addGroundOverlay(new GroundOverlayOptions().)
getMap().setOnMarkerClickListener(this);
getMap().setOnInfoWindowClickListener(this);
marker=new MarkerOptions()
.position(
new LatLng(
Double.parseDouble(item.getLocationLat()),
Double.parseDouble(item.getLocationLong())))
.title(""+item.getStoreTitle())
.icon(bitmapLoyalty
).snippet(sbc.toString());
else
marker=new MarkerOptions()
.position(
new LatLng(
Double.parseDouble(item.getLocationLat()),
Double.parseDouble(item.getLocationLong())))
.title(""+item.getStoreTitle())
.icon(bitmapIconNearBy
).snippet(sbc.toString());
Marker marker1=getMap().addMarker(marker);
PopupWindowAdapter view1=new PopupWindowAdapter();
this.getMap().setInfoWindowAdapter(view1);
// .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));
bmp=BitmapFactory.decodeResource(getResources(),R.drawable.orgr_icon);
}
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
initMap();
getMap().addMarker(new MarkerOptions().position(new
LatLng(36.865814,-119.758399)).icon(BitmapDescriptorFactory.fromResource(R.drawable.red_pin)));
//getMap().addGroundOverlay(new GroundOverlay(null));
/* getMap().addGroundOverlay(new GroundOverlayOptions() .image(image) .positionFromBounds(bounds) .transparency(0.5)); */ }
@Override
public void onPause() {
super.onPause();
//getMap().clear();
}
public void onResume(){
super.onResume();
if(NearByMapActivity.mainMapView!=null)
//if(NearByMapActivity.mainMapView.getVisibility()==View.GONE)
NearByMapActivity.mainMapView.setVisibility(View.VISIBLE);
}
@Override
public boolean onMarkerClick(Marker arg0) {
// TODO Auto-generated method stub
Log.e("cleared", "");
return false;
}
}
public void onStop(){
super.onStop();
//getMap().clear();
}
}
MAP ACTIVITY : 启动 Fragment 的 Activity 类。
public class NearByMapActivity extends FragmentActivity{
onCreate(){
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
Fragment frag=new DisplayMapFragment();
transaction.add(R.id.middle_view, frag);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE);
transaction.addToBackStack(null);
transaction.commit();
}
}