//menu des boutons
        final FloatingActionsMenu menuMultipleActions = (FloatingActionsMenu) findViewById(R.id.floatingButtonMenu_Achat);
        final com.getbase.floatingactionbutton.FloatingActionButton buttonAddPersonne = (com.getbase.floatingactionbutton.FloatingActionButton) findViewById(R.id.b_add);
        buttonAddPersonne.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                buttonAddPersonne.setTitle("Ajouter une personne");
                //buttonAdd.setVisibility(buttonAdd.getVisibility() == View.GONE ? View.VISIBLE : View.GONE);
                //Ajout d'une personne avec le fragemtn AddName
                // create a Dialog component
                final Dialog dialog = new Dialog(UnAchat.this);

                //tell the Dialog to use the dialog.xml as it's layout description
                dialog.setTitle("Ajout d'un nom");
                dialog.setContentView(R.layout.fragment_add_name);
                dialog.show();
            }
        });