//    @Override
//    public void onAttach(Context context) {
//        super.onAttach(context);
//
//         AppCompatActivity activity = (AppCompatActivity) context;
//         final FloatingActionButton fab = new FloatingActionButton(context);
//         fab.setId(R.id.fab_categories);
//         LinearLayout.LayoutParams layoutParams =
//                 new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
//         layoutParams.setMarginEnd((int) getResources().getDimension(R.dimen.fab_margin));
//         layoutParams.gravity = Gravity.BOTTOM|Gravity.END;
//         fab.setLayoutParams(layoutParams);
//         fab.setImageResource(R.drawable.ic_add);
//         fab.setVisibility(View.INVISIBLE);
//
//         CoordinatorLayout coordinatorLayout = (CoordinatorLayout) activity.findViewById(R.id.main_coordinator_layout);
//         coordinatorLayout.addView(fab);
//    }