// Create a drawable for your divider
Drawable exampleDrawable = getResources().getDrawable(R.drawable.example_drawable);

// Create a DividerItemDecoration instance with a single layer and add it to your recycler view
RecyclerView.ItemDecoration itemDecoration = new DividerItemDecoration(new Layer(DividerBuilder.get().with(exampleDrawable).build()));
recyclerView.addItemDecoration(itemDecoration);

public class HighRatingMovieSelector implements Selector {

  private final List<Movie> movies;
  private final int maxHighRating;

  public HighRatingMovieSelector(List<Movie> movies, int maxHighRating) {
    this.movies = movies;
    this.maxHighRating = maxHighRating;
  }

  @Override public boolean isPositionSelected(Position position) {
    return movies.get(position.getAbsoluteIndex()).getRating() >= maxHighRating;
  }

  @Override public EnumSet<Direction> getDirectionsByPosition(Position position) {
    return EnumSet.allOf(Direction.class);
  }
}

Drawable drawable = getResources().getDrawable(R.drawable.example_divider);
Divider divider = DividerBuilder.from(highlightedDrawable).build()

Collection<Layer> layers = LayersBuilder.with(new Layer(new HighRatingMovieSelector(), divider)).build();

RecyclerView.ItemDecoration itemDecoration = new DividerItemDecoration(layers);

recyclerView.addItemDecoration(itemDecoration);

Drawable drawable = getResources().getDrawable(R.drawable.example_drawable);

// Create a layer that applies to all the layers. It's the same as writing :
// Layer allItemsLayer = new Layer(new AllItemsSelector(), DividerBuilder.from(drawable).build());
Layer allItemsLayer = new Layer(DividerBuilder.from(drawable).build());

// Create a layer that applies to all the items in the header with an empty drawable to avoid displaying anything
Layer headerLayer = new Layer(new HeaderSelector(), DividerBuilder.fromEmpty().build());

// Add your layers to the DividerItemDecoration class and provide it to your recycler view!
recyclerView.addItemDecoration(new DividerItemDecoration(LayersBuilder.from(allItemsLayer, headerLayer).build()));

public class NotInHeaderSelector implements Selector {
  @Override public boolean isPositionSelected(Position position) {
    return !position.isFirstRow();
  }

  @Override public EnumSet<Direction> getDirectionsByPosition(Position position) {
    return EnumSet.allOf(Direction.class);
  }
}

public class RowGroupSelector extends AllItemsInRowSelector {

  protected final int row;

  public RowGroupSelector(int row) {
    this.row = row;
  }

  @Override public boolean isPositionSelected(Position position) {
    return position.getRow() == row;
  }

  @Override public EnumSet<Direction> getDirectionsByPosition(Position position) {
    // Every component of the row will need to draw, at least, SOUTH_WEST, WEST, NORTH_WEST, 
    // NORTH_EAST, EAST and SOUTH_EAST directions
    EnumSet<Direction> directions = EnumSet.complementOf(
        EnumSet.of(Direction.WEST, Direction.EAST));

    // If we are the element of the left side we also need to draw the west direction
    if (position.isFirstColumn()) {
      directions.add(Direction.WEST);
    }
    // If we are the element of the right side we also need to draw the east direction
    if (position.isLastColumn()) {
      directions.add(Direction.EAST);
    }

    return directions;
  }
}