How to make BottomNavigationBarItem not clickable and disable tap splash effect?

Question

I have BottomNavigationBar with 5 items and also FloatingActionButton that should change 3rd item 'Photo'.

So I need if user press on central BottomNavigationBarItem 'Photo' it didn't affect switching to this tab.

How can I disable clicking on specific BottomNavigationBarItem?

And here is my code:

import 'package:flutter/material.dart';

class MainPage extends StatefulWidget {
  @override
  _MainPageState createState() => new _MainPageState();
}

class PageInfoData {
  final String title;
  final IconData iconData;

  const PageInfoData(this.title, this.iconData);
}

class _MainPageState extends State<MainPage> {
  int _selectedIndex = 0;

  static const List<PageInfoData> pageInfo = [
    PageInfoData('History', Icons.swap_horiz),
    PageInfoData('Download', Icons.file_download),
    PageInfoData('Photo ', null),
    PageInfoData('Upload', Icons.file_upload),
    PageInfoData('Settings', Icons.settings)
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        automaticallyImplyLeading: false,
        title: Text("Menu"),
        actions: <Widget>[IconButton(icon: Icon(Icons.search, color: Colors.white,),)],
      ),
      body: Center(child: Text('Index$_selectedIndex: ${pageInfo[_selectedIndex].title}')),
      backgroundColor: Colors.white,
      bottomNavigationBar: BottomNavigationBar(
        items: new List<BottomNavigationBarItem>.generate(pageInfo.length, (int index) {
          PageInfoData curPageInfo = pageInfo[index];
          return BottomNavigationBarItem(icon: Icon(curPageInfo.iconData, size: 30.0), title: Text(curPageInfo.title, style: TextStyle(fontSize: 9.0),));
        }),
        type: BottomNavigationBarType.fixed,
        unselectedItemColor: const Color(0xff797979),
        fixedColor: Theme.of(context).primaryColor,
        backgroundColor: const Color(0xffe2e2e2),
        currentIndex: _selectedIndex,
        showUnselectedLabels: true,
        onTap: _onItemTapped,
      ),

      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
      floatingActionButton: FloatingActionButton(
        backgroundColor: Color(0xffa2a5a4),
        child: Icon(Icons.photo_camera, size: 40.0,),
          onPressed: null),
    );
  }

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }
}

---

UPDATE:

Problem almost solved (thank you @ibhavikmakwana) by changing _onItemTapped function

void _onItemTapped(int index) {
    if (index != 2) {
      setState(() {
        _selectedIndex = index;
      });
    }
  }

But it solved not completely. When I tap photo label it still show me a tap splash effect. Can I disable a tap splash effect?

Answer 1

You can do something like below:

Your bottomNavigationBar

bottomNavigationBar: BottomNavigationBar(
  items: [
    BottomNavigationBarItem(
      ...
    ),
    BottomNavigationBarItem(
      ...
    ),
    BottomNavigationBarItem(
      ...
    ),
  ],
  onTap: navigationTapped,
  currentIndex: _page,
),

You can add the conditional check whether the page index match with the current index than don't do anything and return from that point.

Like page == index

Where, index is position of the BottomNavigationBarItem

void navigationTapped(int page) {
  if (page == 1) {
    return;
  } else {
    setState(() {
      _selectedIndex = page;
    });
  }
}