A RecyclerView with multiple view type.

GroupViewHolder

public class GroupViewHolder extends MainViewHolder {

    @InjectView ( R.id.groupTitle )
    TextView mTitle;
    @InjectView ( R.id.groupContent )
    TextView mContent;

    public GroupViewHolder ( View itemView ) {

        super ( itemView );
        ButterKnife.inject ( this, itemView );

    }

}

ImageViewHolder

public class ImageViewHolder extends MainViewHolder {

    @InjectView ( R.id.groupImage )
    ImageView mImage;

    public ImageViewHolder ( View itemView ) {

        super ( itemView );
        ButterKnife.inject ( this, itemView );

    }

}

MainAdapter

public class MainAdapter extends RecyclerView.Adapter< MainAdapter.ViewHolder > {

    private ArrayList< Group > groups = new ArrayList<> ();
    
    private static final int TYPE_IMAGE = 0;
    private static final int TYPE_GROUP = 1;

    @Override
    public int getItemViewType ( int position ) {

        int viewType;
        if ( groups.get ( position ).getImagePath () != null ) {
            viewType = TYPE_IMAGE;

        } else {
            viewType = TYPE_GROUP;
        }

        return viewType;
    }

    @Override
    public ViewHolder onCreateViewHolder ( ViewGroup viewGroup, int viewType ) {

        LayoutInflater mInflater = LayoutInflater.from ( viewGroup.getContext () );
        switch ( viewType ) {
            
            case TYPE_IMAGE:
                ViewGroup vImage = ( ViewGroup ) mInflater.inflate ( R.layout.item_image, viewGroup, false );
                ImageHolder vhImage = new ImageViewHolder ( vImage );
                return vhImage;
            case TYPE_GROUP:
                ViewGroup vGroup = ( ViewGroup ) mInflater.inflate ( R.layout.item_group, viewGroup, false );
                GroupViewHolder vhGroup = new GroupViewHolder ( vGroup );
                return vhGroup;
            default:
                ViewGroup vGroup0 = ( ViewGroup ) mInflater.inflate ( R.layout.item_group, viewGroup, false );
                GroupViewHolder vhGroup0 = new GroupViewHolder ( vGroup0 );
                return vhGroup0;
        }
    }

    @Override
    public void onBindViewHolder ( ViewHolder viewHolder, int i ) {

        switch ( viewHolder.getItemViewType () ) {
          
            case TYPE_IMAGE:

                ImageViewHolder imageViewHolder = ( ViewHolderGuide ) viewHolder;
                
                imageViewHolder.mImage.setImageResource ( R.drawable.img_placeholder );
                break;
                
            case TYPE_GROUP:
              
                GroupViewHolder groupViewHolder = ( GroupViewHolder ) viewHolder;

                groupViewHolder.mContent.setText ( groups.get ( i ).getContent() );
                groupViewHolder.mTitle.setText ( groups.get ( i ).getTitle () );
                break;
                
        }

    }

    @Override
    public int getItemCount () {

        return groups.size ();
    }

    public MainAdapter ( List< Group > groups ) {
      
        this.groups = new ArrayList<> ( groups );

    }

}

MainViewHolder

public class MainViewHolder extends RecyclerView.ViewHolder {

    public ViewHolder ( View itemView ) {

        super ( itemView );

    }
}

What is ViewHolderGuide?

Update:
I had just put my custom holder class instead of ViewHolderGuide and it worked.
Thanks a lot!

That is good that you created a multiple view type adapter, but the best way it is to use any library, for example https://github.com/vivchar/RendererRecyclerViewAdapter