Flutter : How to create search bar from ListView.builder with JSON data?

Question

I've created ListView.builder inside the FutureBuilder from my JSON (local) file. Also i've created a TextField widget to make it search bar of my ListView.builder. But I don't know how implement search bar syntax into my TextField and ListView.builder.

This is my FutureBuilder widget :

FutureBuilder(
  future: _isInit ? fetchDoa(context) : Future(null),
  builder: (context, _) {
    if (doaList != null) {
      return ListView.builder(
        itemCount: doaList.length,
        itemBuilder: (BuildContext context, int index) {
          Doa doa = doaList[index];
          return _itemList(index);
        },
      );
    } else {
      CircularProgressIndicator();
    }
    return CircularProgressIndicator();
  }),

Here is _itemList(index) :

_itemList(index) {
    Doa doa = doaList[index];
    return Container(
        margin: EdgeInsets.symmetric(horizontal: 24),
        child: ListTile(
            title: Text(doa.judul,
                style: TextStyle(fontFamily: "Poppins", fontSize: 16)),
            onTap: () {
              Navigator.of(context).push(MaterialPageRoute(
                  builder: (BuildContext context) => DetailDoa(doa: doa)));
            },
            trailing: Icon(
              Icons.arrow_forward_ios_rounded,
              color: Colors.teal,
            )));
  }

The search bar is separated from FutureBuilder because I used Stack in my project. And this is my TextField that I want to use as search bar :

_searchBar() {
    return SingleChildScrollView(
      child: Center(
        child: Container(
            margin: EdgeInsets.only(top: 60),
            width: context.widthPct(.8),
            height: context.widthPct(.8) / 6,
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(34),
              color: Colors.grey[200],
            ),
            child: Container(
                child: Theme(
              data: new ThemeData(
                primaryColor: Colors.grey[200],
              ),
              child: TextField(
                onSubmitted: (String str) {
                  str = str.toLowerCase();
                  setState(() {});
                },
                autofocus: false,
                style:
                    TextStyle(color: Colors.grey[700], fontFamily: "Poppins"),
                cursorColor: Colors.white,
                decoration: InputDecoration(
                    suffixIcon: Icon(
                      Icons.search,
                      color: Colors.grey[700],
                    ),
                    contentPadding: EdgeInsets.fromLTRB(24, 16, 24, 16),
                    hintText: "Cari doa dulu yuk",
                    hintStyle: TextStyle(
                        color: Colors.grey[700], fontFamily: "Poppins"),
                    border: OutlineInputBorder(
                        borderRadius: BorderRadius.circular(200),
                        borderSide: new BorderSide(color: Colors.grey[200]))),
              ),
            ))),
      ),
    );
  }

Here is the preview of my app :

Thank you very much for your help :)

@ProblematicDude how to use that??? I'm sorry because i'm still newbie in Flutter :( — Bill Rei
– Bill Rei, Commented Apr 17, 2021 at 12:03

Pathik Patel · Accepted Answer · 2021-04-17 12:08:08Z

2

To achieve search functionality,

You have to return _itemList(index); conditionally.
return _itemList(index); when search string is empty.
If search string isn't empty, check any matches of search string with doaList[index].judul if matches then, return _itemList(index); or return Container().
Search String is the input user given in search field.

Check below snippet with minimal logic to search two string with your case.

String searchSrc = doaList[index].judul.toString().toLowerCase();
String searchTarget = searchString.toString().toLowerCase();

if(searchTarget == "") return _itemList(index);

if (searchSrc.contains(searchTarget)) {
  // found
  return _itemList(index);
} else {
  // not found
  return Container();
}

answered Apr 17, 2021 at 12:08

Pathik Patel

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3 Comments

Bill Rei Over a year ago

replit.com/join/mhwfyckk-nabilrei here is my full code. can you help me to create a syntax for search bar?? thank you :)

Pathik Patel Over a year ago

Updated, Please check.

Bill Rei Over a year ago

WOW it's work ! THANK YOU VERY MUCH PATHIK :))) Hope you always success

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