My application is to search through the list of books. Two different variables (book name or barcode) can be used while searching. There is no problem when searching by name. but when searching with barcode scanning, no results are listed. When I type the barcode manually, the application still works without any problems.
Can u help me?
Manually entered barcode: https://i.sstatic.net/njtLA.png
Barcode scan result : https://i.sstatic.net/ZsGot.png
My code here..
import 'package:fff/book_tile.dart'; import 'package:flutter/material.dart'; import 'package:flutter_barcode_scanner/flutter_barcode_scanner.dart'; import 'package:font_awesome_flutter/font_awesome_flutter.dart'; import 'package:fff/book_model.dart'; class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState(); } class _HomePageState extends State<HomePage> { TextEditingController _controller = new TextEditingController(); List<Book> _booksForDisplay = []; List<Book> _books = []; @override void initState() { super.initState(); fetchBooks().then((value) { setState(() { _books.addAll(value); _booksForDisplay = _books; print(_booksForDisplay.length); }); }); } Future _scan(BuildContext context) async { String barcode = await FlutterBarcodeScanner.scanBarcode( '#ff0000', 'İptal', true, ScanMode.BARCODE ); _controller.text = barcode; } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( toolbarHeight: 80, title: Padding( padding: EdgeInsets.all(8), child: Container( decoration: BoxDecoration( color: Colors.white, borderRadius: BorderRadius.circular(40) ), child: Padding( padding: EdgeInsets.symmetric(horizontal: 12), child: TextFormField( textAlignVertical: TextAlignVertical.center, controller: _controller, decoration: InputDecoration( border: InputBorder.none, icon: Icon(Icons.search), suffixIcon: IconButton( icon: Icon(FontAwesomeIcons.barcode), onPressed: (){ _scan(context); }, ) ), onChanged: (string){ string = string.toLowerCase(); setState(() { _booksForDisplay = _books.where((b){ var bName = b.name!.toLowerCase(); var bBarcode = b.barcode!.toLowerCase(); return bName.startsWith(string) || bBarcode.startsWith(string); }).toList(); }); }, ), ), ), ), ), body: SafeArea( child: Container( child: _controller.text.isNotEmpty ? new ListView.builder( itemCount: _booksForDisplay.length, itemBuilder: (context, index){ return BookTile(book: this._booksForDisplay[index]); }, ) : Center( child: Text('Searching..'), ) ), ) ); } } 
