@BindView(R.id.bottom_nav)
    BottomNavigationView bottomNavigationView;

 	private final BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
            = item -> {
        switch (item.getItemId()) {
            case R.id.item_1:
                return true;

            case R.id.item_2:
                return true;

            case R.id.item_report:
                showFragment(R.string.main_tab_report, fragmentReport);
                return true;
        }
        return false;
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       this.bottomNavigationView.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
    }