How do I access all the tags on my google map object (Android maps V2) and set them to (visible)?

I am currently trying to implement an actionbar button to set all tags on my google map object to be visible or invisible when using it. My problem is that I don't know how to reference it after creating and displaying all tags on the map. I am looking for a solution. I store all tag objects in an array, I can access other parts of my code. Is this reasonable?

This is what I was thinking:

 private Marker[] mMarkerArray = null;
 for (int i = 0; i < MainActivity.customers.size(); i++) {

     LatLng location = new LatLng(mData.lat, mData.lng);

     Marker marker = mMap.addMarker(new MarkerOptions().position(location)
                          .title(mData.title)
                          .snippet(mData.snippet));
     mMarkerArray.add(marker);                      
   }

And set all tags invisible in another method:

for (int i = 0;  i < mMarkerArray.length;; i++) {
    mMarkerArray[i].setVisible(false);
}

It refuses to add tags to the marker [] – array. How can I implement it?

Mmarkerarray. Add (tag) does not work

resolvent:

I came up with an answer. My customerlist makes customers have no coordinates – > (0,0; 0,0). The inspiration comes from this blog

Initialize ArrayList:

private ArrayList<Marker> mMarkerArray = new ArrayList<Marker>();

Add tags to my map and mmarkerarray:

for (int i = 0; i < MainActivity.customers.size(); i++) {
        Customer customer = MainActivity.customers.get(i);
        if (customer.getLon() != 0.0) {
            if (!customer.isProspect()) {
                Data mData= new Data(customer.getLat(),customer.getLon(),customer.getName(),
                        customer.getOrt());

                LatLng location = new LatLng(mData.lat, mData.lng);

                Marker marker = mMap.addMarker(new MarkerOptions().position(location)
                          .title(mData.title)
                          .snippet(mData.snippet));

                mMarkerArray.add(marker); 
}}} 

Set all tags invisible

for (Marker marker : mMarkerArray) {
    marker.setVisible(false);
    //marker.remove(); <-- works too!
}