android - Maps V2 myLocation 蓝点回调

Question

我希望能够单击地图上显示的蓝点（我的位置）。无论如何可以从该点击中获得回调？

谢谢，马丁

Answer 1

一种可能的解决方法是Marker在“我的位置”点顶部绘制一个（带有类似图标），以便您可以接收相应的onMarkerClick()回调。这还需要在每次发生位置更新事件时删除标记并将其添加到新位置，您可以通过实现OnMyLocationChangeListener.

编辑：该OnMyLocationChangeListener接口现在已弃用，应该使用新LocationClient的和关联的LocationListener.

所以相关代码可能看起来像这样（我实际上没有测试过）：

public class DemoMapFragment extends SupportMapFragment implements OnMyLocationChangeListener, OnMarkerClickListener { 

    // Note that 'mMap' may be null if the Google Play services APK is not available. 
    private GoogleMap mMap; 
    private Marker myLocationMarker;
    private static BitmapDescriptor markerIconBitmapDescriptor;
    /* ... */

    @Override 
    public void onResume() { 
        super.onResume(); 
        setUpMapIfNeeded(); // Get a reference to the map      
        mMap.setMyLocationEnabled(true); // Enable the my-location layer 
        mMap.setOnMyLocationChangeListener(this); 
        mMap.setOnMarkerClickListener(this);
    }

    private void setUpMapIfNeeded() { 
        // Do a null check to confirm that we have not already instantiated the map. 
        if (mMap == null) { 
            mMap = getMap(); 
            // Check if we were successful in obtaining the map. 
            if (mMap != null) { 
                // The Map is verified. It is now safe to manipulate the map:

                // Load custom marker icon
                markerIconBitmapDescriptor = BitmapDescriptorFactory.fromResource(R.drawable.my_location_dot_icon); 

                // When the map is first loaded we need to add our marker on top of My Location dot
                myLocationMarker = mMap.addMarker(new MarkerOptions() 
                        .position(new LatLng(mMap.getMyLocation().getLatitude(),mMap.getMyLocation().getLongitude())) 
                        .icon(markerIconBitmapDescriptor)); 

                // Set default zoom 
                mMap.moveCamera(CameraUpdateFactory.zoomTo(15f)); 
            } 
        } 
    }   

    @Override
    public void onMyLocationChange(Location location) {
        // Remove the old marker object
        myLocationMarker.remove(); 

        // Add a new marker object at the new (My Location dot) location
        myLocationMarker = mMap.addMarker(new MarkerOptions() 
                .position(new LatLng(location().getLatitude(),location().getLongitude())) 
                .icon(markerIconBitmapDescriptor)); 
    }

    @Override
    public boolean onMarkerClick(Marker marker) {
        if (marker.equals(myLocationMarker)) {
            /* My Location dot callback ... */
        }
    }
}