android - 在一个应用程序中使用 2 个 map fragment 时出现问题

Question

我正在尝试在两个不同的 fragment Activity 中使用两个不同的 map fragment 。根据 SupportMapFragment 设计，我将映射键保存在 list 文件中应用程序属性的元标记中。 但是我的 map View 没有清除，它在第二个 fragment 中显示了带有旧点的同一张 map ，尽管我正在调用“getMap().clear()”。请建议

除非我不在单独的 Activity 中使用新的 MapFragment，否则它工作正常，如果我使用新的 MapFragment，它会采用相同的 map View ，因此不会清除 map View 。

代码:

map fragment

公共(public)类 DisplayMapFragment 扩展了 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(图像) .positionFromBounds(界限) .透明度(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();
}
}

Answer 1

您可能受到此错误的影响: https://code.google.com/p/gmaps-api-issues/issues/detail?id=5027&thanks=5027&ts=1362071369