title: Add markers dynamically on Google Maps v2 for Android
body: <p>what are the possibilities to add markers dynamically depending on the area of the map which is shown?</p>
  
  <p>I have a lot of markers or let´s say my markers need a lot of performance to be rendered, cause they are custom. I implemented it now, that only 40 markers are drawn when a "camerachange" was fired. So at this time i always render 40 new markers when cameraposition was changed.</p>
  
  <p>I read about runnable and handler, are their more options? Does someone know which of these possibilities is the best, so that ui-thread isn´t blocked?</p>