public void addAnnotation(String annotation,double x,double y){
  mAnnotations.add(annotation);
  while (mStringXY.get(x) != null) {
    x+=getPadding(x);
  }
  mStringXY.put(x,y);
}

public void addAnnotation ( String annotation , double x , double y ) { mAnnotations . add ( annotation ) ; while ( mStringXY . get ( x ) != null ) { x += getPadding ( x ) ; } mStringXY . put ( x , y ) ; }
add an string at ( x , y ) coordinates
