code: public boolean isEdgeTouched(int edges) {
          final int count = mInitialEdgeTouched.length;
          for (int i = 0; i < count; i++) {
              if (isEdgeTouched(edges, i)) {
                  return true;
              }
          }
          return false;
      }
docs: Check if any of the edges specified were initially touched in the
  currently active gesture. If there is no currently active gesture this
  method will return false.
  
  @param edges Edges to check for an initial edge touch. See
  {@link #EDGE_LEFT}, {@link #EDGE_TOP}, {@link #EDGE_RIGHT},
  {@link #EDGE_BOTTOM} and {@link #EDGE_ALL}
  @return true if any of the edges specified were initially touched in the
  current gesture