android location with pin on map

I'm working on an Android application which basically shows the real开发者_C百科 time location of user on map with a pin.

When the user moves the pin should also move. I want to show multiple user's with image and moving pin as location changes on map.

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    myLocationOverlay = new MyLocationOverlay(this, mapView); 
    mapView.getOverlays().add(myLocationOverlay); 
    myLocationOverlay.enableMyLocation(); 
    myLocationOverlay.runOnFirstFix(addfirststandort);