Associate an object with Marker (google map v2)

Question

In my app I have some objects that have their location displayed on the map using markers. The problem is that the only way I've found to handle marker clicks is

googleMap.setOnMarkerClickListener(new ... {     @Override     public void onMarkerClick(Marker marker) {        // how to get the object associated to marker???     } }) 

In other words I get the Marker object while the only interface that I have allows me to set just MarkerOptions.

Any way to associate Marker with an object?

Answer 1

I reckon this callback was not very thoroughly though by the Android team, but, it's what we have.

Whenever you call mMap.addMarker(); it returns the generated marker. You can then use a HashMap or some other data holder structure to remember it.

// Create the hash map on the beginning WeakHashMap <Marker, Object> haspMap = new WeakHashMap <Marker, Object>();   // whenever adding your marker Marker m = mMap.addMarker(new MarkerOptions().position(lat, lng).title("Hello World").icon(icon_bmp)); haspMap.put(m, your_data); 

Answer 2

You can associate arbitrary object by using Marker's setTag() method

Marker amarker = mMap.addMarker(new MarkerOptions().position(lat, lng).title("Hello World")); amarker.setTag(new SomeData()); 

To retrieve data associated with marker, you simply read it using its getTag() and then cast it to its original type.

SomeData adata = (SomeData) amarker.getTag(); 

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