This method is used for fragment transaction

PushFragment

/**
     * push fragment
     *
     * @param fragment  fragment
     * @param animate   fragment transition animation
     * @param shouldAdd add to back stack
     * @param tag       fragment tag
     */
    public void pushFragments(Fragment fragment, boolean animate, boolean shouldAdd, String tag) {
        FragmentManager manager = getActivity().getSupportFragmentManager();
        FragmentTransaction ft = manager.beginTransaction();
        if (animate) {
            ft.setCustomAnimations(R.anim.enter, R.anim.exit, R.anim.pop_enter, R.anim.pop_exit);
        }

        if (shouldAdd) {
            ft.replace(R.id.content, fragment, tag);
            ft.addToBackStack(tag);
            ft.commitAllowingStateLoss();
        } else {
            manager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
            ft.replace(R.id.content, fragment, tag);
            ft.commit();
        }

    }