Flutter quick start

File Viewer Flutter is an independently maintained Flutter component with application-scoped warm-up, reusable sessions and bundled offline resources. The pub.dev release is development preview 0.1.0-dev.1. Customer applications need no Node.js or JavaScript source build.

1. Install and configure

Use Flutter 3.47+ / Dart 3.13+. Add to your application's pubspec.yaml:

dependencies:
  file_viewer_flutter: 0.1.0-dev.1

flutter pub get
dart run file_viewer_flutter:setup --project . --check
dart run file_viewer_flutter:setup --project . --apply

Run from the application root. --check previews host changes; only --apply writes them. Web needs no native host changes. Fully rebuild the application afterward.

2. Add and display a document

Place a PDF at assets/example.pdf and declare it in the same pubspec.yaml:

flutter:
  assets:
    - assets/example.pdf

Application entry:

import 'package:flutter/material.dart';
import 'package:file_viewer_flutter/file_viewer_flutter.dart';

void main() {
  runApp(const FileViewerHost(
    child: MaterialApp(
      home: Scaffold(
        body: FileViewer(
          source: FileViewerSource.asset('assets/example.pdf'),
        ),
      ),
    ),
  ));
}

FileViewerHost warms up after the first frame and Scaffold.body provides bounded layout. Use an explicit size or Expanded in other layouts.

Continue reading

• Complete Flutter documentation: platform setup, sources, controllers, session reuse and offline delivery.
• pub.dev package and independent Flutter repository.

Targets include Android, iOS, Web, Windows, macOS and Linux. Consult the Flutter site's qualification notes for measured device, OS and format scope. Background retention remains subject to OS suspension and reclamation; perpetual background operation and universal device qualification are not promised.