Google Maps v2 Marker zOrdering - Set to top

Question

I know there are a few threads around on this topic but i havent yet found a good enough solution.

I NEED to place a marker over the top of all other markers. How do

Answer 1

This was added in Google Play Services 9.2 (June 27, 2016)

The new MarkerOptions.zIndex() sets the stack order of a marker in relation to other markers on the map. Read more about marker z-indexes and the effect of z-index on click events. (Issue 4688)

Answer 2

Aiden Fry's answer works if you do actually display an InfoWindow. If you don't, the marker won't come to the front. Here is a hack to make it come to the front anyway:

Create a custom InfoWindowAdapter that displays a 0dp info window:

public class MapWindowAdapter implements GoogleMap.InfoWindowAdapter {
    private Context context = null;

    public MapWindowAdapter(Context context) {
        this.context = context;
    }

    // Hack to prevent info window from displaying: use a 0dp/0dp frame
    @Override
    public View getInfoWindow(Marker marker) {
        View v = ((Activity) context).getLayoutInflater().inflate(R.layout.no_info_window, null);
        return v;
    }

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

Here is the code for the layout:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="0dp"
              android:layout_height="0dp">
</LinearLayout>

When you set up your map, set the adapter and custom InfoWindowAdapter and OnMarkerClickListener (using showInfoWindow and returning true as AIden Fry advised):

mMap.setInfoWindowAdapter(new MapWindowAdapter(this));

//Call showInfoWindow to put marker on top of others.
myMarker.showInfoWindow();

This is not beautiful, but I didn't find any other way to deal with z-indexing without using info windows.

Answer 3

Whilst not the perfect solution! I have figured out how to show a selected (tapped) marker over all other markers by consuming the onMarkerClick event. Returning TRUE will consume this event, so we have to do the showInfoWindow and zoom to center

    @Override
    public boolean onMarkerClick(Marker marker) {

       //Manually open the window
       marker.showInfoWindow();

       //Animate to center
       sMapFrag_v2.getMap().animateCamera(CameraUpdateFactory.newLatLng(marker.getPosition());

       //Consume the method
       return true;
    }