file_saver 0.2.4

This package will help you save file with a single method on any platform including macOS, iOS, Android, Windows, Web, Linux.

example/lib/main.dart

import 'dart:developer';
import 'dart:io';

import 'package:excel/excel.dart';
import 'package:file_saver/file_saver.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  TextEditingController textEditingController = TextEditingController();
  TextEditingController linkController = TextEditingController(
      text:
          "https://i.pinimg.com/564x/80/d4/90/80d490f65d5e6132b2a6e3b5883785f3.jpg");
  TextEditingController extController = TextEditingController(text: "jpg");

  @override
  void initState() {
    super.initState();
  }

  List<int>? getExcel() {
    final Excel excel = Excel.createExcel();
    final Sheet sheetObject = excel['Sheet1'];
    sheetObject.insertColumn(0);
    for (int i = 1; i < 10; i++) {
      sheetObject.appendRow([i]);
    }
    List<int>? sheets = excel.encode();
    return sheets;
  }

  MimeType type = MimeType.jpeg;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('File Saver'),
        ),
        body: Column(
          children: [
            Center(
              child: Padding(
                padding: const EdgeInsets.all(8.0),
                child: TextField(
                  controller: textEditingController,
                  decoration: const InputDecoration(
                      labelText: "Name",
                      hintText: "Something",
                      border: OutlineInputBorder()),
                ),
              ),
            ),
            Center(
              child: Padding(
                padding: const EdgeInsets.all(8.0),
                child: TextField(
                  controller: linkController,
                  decoration: const InputDecoration(
                      labelText: "Link",
                      hintText:
                          "https://i.pinimg.com/564x/80/d4/90/80d490f65d5e6132b2a6e3b5883785f3.jpg",
                      border: OutlineInputBorder()),
                ),
              ),
            ),
            Center(
              child: Padding(
                padding: const EdgeInsets.all(8.0),
                child: TextField(
                  controller: extController,
                  decoration: const InputDecoration(
                      labelText: "Extension",
                      hintText: "jpg",
                      border: OutlineInputBorder()),
                ),
              ),
            ),
            DropdownButton(
              value: type,
              items: MimeType.values
                  .map((e) => DropdownMenuItem(value: e, child: Text(e.name)))
                  .toList(),
              onChanged: (value) {
                setState(() {
                  type = value as MimeType;
                });
              },
            ),
            ElevatedButton(
                onPressed: () async {
                  if (!kIsWeb) {
                    if (Platform.isIOS || Platform.isAndroid) {
                      bool status = await Permission.storage.isGranted;

                      if (!status) await Permission.storage.request();
                    }
                  }
                  if (type != MimeType.other && extController.text.isEmpty) {
                    ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(content: Text("Extension is required")));
                  }

                  if (linkController.text.isEmpty) {
                    ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(content: Text("Link is required")));
                  }

                  //!Code for testing bytes
                  Excel excel = Excel.createExcel();
                  Sheet sheetObject = excel['Sheet1'];
                  sheetObject.insertColumn(0);
                  for (int i = 1; i < 10; i++) {
                    sheetObject.appendRow([i]);
                  }

                  String path = await FileSaver.instance.saveFile(
                      name: textEditingController.text == ""
                          ? "File"
                          : textEditingController.text,
                      //link:  linkController.text,
                      bytes: Uint8List.fromList(excel.encode()!),
                      ext: 'xlsx',

                      ///extController.text,
                      mimeType: MimeType.microsoftExcel);
                  log(path);
                },
                child: const Text("Save File")),
            /* if (!kIsWeb)
              if (Platform.isAndroid || Platform.isIOS || Platform.isMacOS) */
            ElevatedButton(
              onPressed: () async {
                if (type != MimeType.other && extController.text.isEmpty) {
                  ScaffoldMessenger.of(context).showSnackBar(
                      const SnackBar(content: Text("Extension is required")));
                }

                if (linkController.text.isEmpty) {
                  ScaffoldMessenger.of(context).showSnackBar(
                      const SnackBar(content: Text("Link is required")));
                }
                /*    if (Platform.isAndroid || Platform.isIOS) {
                  var permission = await Permission.storage.request();
                  if (permission == PermissionStatus.granted) {
                  } else {
                    log("Permission Denied");
                  }
                } */

                //!Code for testing bytes
                Excel excel = Excel.createExcel();
                Sheet sheetObject = excel['Sheet1'];
                sheetObject.insertColumn(0);
                for (int i = 1; i < 10; i++) {
                  sheetObject.appendRow([i]);
                }
                String? path = await FileSaver.instance.saveAs(
                    name: textEditingController.text == ""
                        ? "File"
                        : textEditingController.text,
                    //link:  linkController.text,
                    bytes: Uint8List.fromList(excel.encode()!),
                    ext: 'xlsx',

                    ///extController.text,
                    mimeType: MimeType.microsoftExcel);
                log(path.toString());
              },
              child: const Text("Open File Manager"),
            )
          ],
        ),
      ),
    );
  }
}