View mView;
    ImageButton mMenuPopup;
    Context mContext;
    private DatabaseReference mDatabase1;
    public BloviewHolderr(View itemView) {
        super(itemView);

        mView = itemView;
        mMenuPopup = (ImageButton) mView.findViewById(R.id.menuComentario);

        mMenuPopup.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mContext = mView.getContext();
                PopupMenu popup = new PopupMenu(mContext, mMenuPopup);
                //Inflando o popup usando o arquivo xml
                popup.getMenuInflater().inflate(R.menu.menu_comentarioo, popup.getMenu());

                //Resgata o item clicado e mostra em um Toast
                popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.apagar:
                                Intent singleBlogIntent = new Intent (Comentarios.this, FloatChat.class);
                                startActivity(singleBlogIntent);
                        // read the listItemPosition here
                                // read the listItemPositionForPopupMenu here
                                return true;
                            default:
                                return false;
                        }
                    }});

                popup.show();;
                }
            });
        }