将标记添加到哈希映射而不将它们添加到映射

Question

我想在这个哈希图中添加谷歌地图标记：

private HashMap<Marker, MyMarker> mMarkersHashMap;

不将它们添加到谷歌地图。这是我目前拥有的代码：

MarkerOptions markerOption = new MarkerOptions().position(new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude()));
Marker currentMarker = mMap.addMarker(markerOption);
mMarkersHashMap.put(currentMarker, myMarker);

此代码将标记添加到哈希映射，但也将标记添加到映射（使用 addMarker），这是我不想要的。任何建议

这是我正在处理的功能：

private void plotMarkers(ArrayList<MyMarker> markers)
    {
        if(markers.size() > 0)
        {
            for (final MyMarker myMarker : markers)
            {
                MarkerOptions markerOption = new MarkerOptions().position(new LatLng(myMarker.getmLatitude(), myMarker.getmLongitude()));

                Marker currentMarker = mMap.addMarker(markerOption);
                //Passes markers into hashmap so they can be used by the information window methods
                mMarkersHashMap.put(currentMarker, myMarker);

                mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
                    @Override
                    public void onInfoWindowClick(Marker marker) {
                        Intent ListIntent = new Intent(getApplicationContext(), InfoWindowList.class);
                        MyMarker myMarker = mMarkersHashMap.get(marker);
                        String title = myMarker.getmLabel();
                        ListIntent.putExtra("COUNTY", title);
                        startActivity(ListIntent);
                    }
                });

                mMap.setInfoWindowAdapter(new MarkerInfoWindowAdapter());
            }

        }
        mClusterManager.addItems(markers);
    }

我希望mClusterManager.addItems(markers); 将标记添加到地图中。

这是我的信息窗口函数，它需要哈希图在哈希图中的标记上设置信息窗口：

public class MarkerInfoWindowAdapter implements GoogleMap.InfoWindowAdapter
    {
        public MarkerInfoWindowAdapter()
        {
        }

        @Override
        public View getInfoWindow(Marker marker)
        {
            return null;
        }

        @Override
        public View getInfoContents(Marker marker)
        {

            View v  = getLayoutInflater().inflate(R.layout.infowindow_layout, null);
            MyMarker myMarker = mMarkersHashMap.get(marker);

            ImageView markerIcon = (ImageView) v.findViewById(R.id.marker_icon);
            TextView markerLabel = (TextView)v.findViewById(R.id.marker_label);
            TextView anotherLabel = (TextView)v.findViewById(R.id.another_label);
            //anotherLabel.setOnClickListener(newsfeed);

            markerIcon.setImageResource(manageMarkerIcon(myMarker.getmIcon()));
            anotherLabel.setText("Newsfeed");
            markerLabel.setText(myMarker.getmLabel());

            return v;

        }
    }

MyMarker 类：

public class MyMarker implements ClusterItem {
    private String mLabel;
    private String mIcon;
    private Double mLatitude;
    private Double mLongitude;
    private final LatLng mPosition;

    public MyMarker(String label, String icon, Double latitude, Double longitude)
    {
        this.mLabel = label;
        this.mLatitude = latitude;
        this.mLongitude = longitude;
        this.mIcon = icon;
        mPosition = new LatLng(latitude, longitude);
    }

    //mPosition = LatLng(mLatitude, mLongitude);
    @Override
    public LatLng getPosition() {
        return mPosition;
    }

    public String getmLabel()
    {
        return mLabel;
    }

    public void setmLabel(String mLabel)
    {
        this.mLabel = mLabel;
    }

    public String getmIcon()
    {
        return mIcon;
    }

    public void setmIcon(String icon)
    {
        this.mIcon = icon;
    }

    public Double getmLatitude()
    {
        return mLatitude;
    }

    public void setmLatitude(Double mLatitude)
    {
        this.mLatitude = mLatitude;
    }

    public Double getmLongitude()
    {
        return mLongitude;
    }

    public void setmLongitude(Double mLongitude)
    {
        this.mLongitude = mLongitude;
    }
}

Answer 1

当您将MarkerOptions 提供给地图并调用addMarker 时会创建一个“标记”，因此如果不先将其添加到地图中，您将无法获得标记。

如果您只是想让标记不可见，请更改其可见性

Answer 2

您可以将标记添加到地图，然后使用隐藏它

currentMarker.setVisible(false);

但不确定这是最有效的路线。取决于您的用例。

---

根据评论编辑

如果您只需要维护一个HashMap 标记，您是否尝试过使用ClusterRenderer？

这是一个例子：

clusterManager.setRenderer(new DefaultClusterRenderer<MyMarker>(activity, map, clusterManager) {
            @Override
            protected void onClusterItemRendered(MyMarker myMarker, Marker marker) {
                super.onClusterItemRendered(mobileMarker, marker);
                // add to hashmap here
            }

            ... override other methods as needed

        });

clusterManager.addItems(markers)