Not able to make scrolling in my Listview items that are in the stack in flutter

Question

I want this design enter image description here and almost i have made this design but the problem is with i'm unable to add scrolling in it ..if i'm not using the right approach then give me solution for this

Here's my code "

 List<String> topics = [
    'Need support',
    'Relationship & love',
    'Confession & secret',
    'Inspiration & motivation',
    'Food & Cooking',
    'Personal Story',
    'Business',
    'Something I learned',
    'Education & Learning',
    'Books & Literature',
    'Spirit & Mind',
    'Travel & Adventure',
    'Fashion & Style',
    'Creativity & Art',
    'Humor & Comedy',
    'Sports & Fitness',
    'Technology & Innovation',
    'Current Events & News',
    'Health & Wellness',
    'Hobbies & Interests'
  ];

"
"

SizedBox(
                                height: 50,
                                child: Stack(
                                  children:
                                      List.generate(topics.length, (index) {
                                    Color? color;
                                    switch (index % 4) {
                                      case 0:
                                        color = Colors.yellow;
                                        break;
                                      case 1:
                                        color = Colors.blue;
                                        break;
                                      case 2:
                                        color = Colors.green;
                                        break;
                                      case 3:
                                        color = Colors.red;
                                        break;
                                    }
                                    int reversedIndex =
                                        topics.length - index - 1;
                                    return Positioned(
                                      left: reversedIndex * 130.0,
                                      child: Container(
                                        width: 150,
                                        alignment: Alignment.center,
                                        padding: const EdgeInsets.symmetric(
                                            horizontal: 5),
                                        decoration: BoxDecoration(
                                          color: color,
                                          borderRadius: const BorderRadius.only(
                                            topRight: Radius.circular(40),
                                            bottomRight: Radius.circular(40),
                                          ),
                                        ),
                                        height: 50,
                                        child: InkWell(
                                          onTap: () {
                                            filterPro.searchValue = '';
                                            filterPro.setSearchingValue(
                                                topics[reversedIndex]);
                                          },
                                          child: Text(
                                            topics[reversedIndex],
                                            style: TextStyle(
                                              fontFamily: fontFamily,
                                              color: whiteColor,
                                              fontSize: 11,
                                            ),
                                          ),
                                        ),
                                      ),
                                    );
                                  }),
                                ),
                              );
                     

" Please check my above code and give me the solution how to make this list scrollable.

Answer 1

Here is the code of your solution:

Scaffold(
  appBar: AppBar(),
  body: SizedBox(
    height: 50,
    width: double.infinity,
    child: ListView.builder(
      itemCount: topics.length,
      scrollDirection: Axis.horizontal,
      itemBuilder: (context, index) => Stack(
        children: [
          Container(
            width: 150,
            height: 50,
            color: _getColor(index + 1 < topics.length ? index + 1 : index),
          ),
          Container(
            width: 150,
            height: 50,
            alignment: Alignment.center,
            padding: const EdgeInsets.symmetric(horizontal: 5),
            decoration: BoxDecoration(
              color: _getColor(index),
              borderRadius: const BorderRadius.only(
                topRight: Radius.circular(40),
                bottomRight: Radius.circular(40),
              ),
            ),
            child: InkWell(
              onTap: () {},
              child: Text(
                topics[index],
                style: const TextStyle(
                  color: Colors.white,
                  fontSize: 11,
                ),
              ),
            ),
          ),
        ],
      ),
    ),
  ),
);

And function for get Colour:

Color _getColor(int index) {
switch (index % 4) {
  case 0:
    return Colors.purple;
  case 1:
    return Colors.blue;
  case 2:
    return Colors.green;
  case 3:
    return Colors.red;
  default:
    return Colors.purple;
}