Link preview in Flutter

In questo articolo vogliamo ottenere una sorta di link preview stile Google nella nostra app Flutter.

Per farlo abbiamo una libreria apposita: simple_url_preview!

Aggiungete la dipendenza al pubspec.yaml:

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  simple_url_preview: ^3.0.1

Qui sotto un pò di codice di esempio:

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

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final String _url = "https://github.com/mattepuffo";

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          SimpleUrlPreview(
            url: _url,
            titleLines: 2,
            descriptionLines: 3,
            imageLoaderColor: Colors.black,
            previewHeight: 500,
            previewContainerPadding: const EdgeInsets.all(10),
            titleStyle: const TextStyle(
              fontSize: 16,
              fontWeight: FontWeight.bold,
              color: Colors.black26,
            ),
            descriptionStyle: TextStyle(
              fontSize: 14,
              color: Theme.of(context).primaryColor,
            ),
            siteNameStyle: TextStyle(
              fontSize: 14,
              color: Theme.of(context).primaryColor,
            ),
          ),
        ],
      ),
    );
  }
}

Enjoy!