Flutter webview file download

Flutter WebView File Download

To download files from a WebView in Flutter, you can make use of the flutter_inappwebview package. This package provides a WebView widget that allows you to embed web content in your Flutter application.

First, you need to add the flutter_inappwebview dependency to your pubspec.yaml file:

dependencies:
  flutter_inappwebview: ^5.3.2

Run the flutter pub get command to fetch the added package.

Next, import the necessary packages in your Dart file:

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

Now, you can use the InAppWebView widget to display a WebView in your Flutter application:

class WebViewFileDownload extends StatefulWidget {
  @override
  _WebViewFileDownloadState createState() => _WebViewFileDownloadState();
}

class _WebViewFileDownloadState extends State {
  InAppWebViewController? _webViewController;
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('WebView File Download'),
      ),
      body: InAppWebView(
        initialUrlRequest: URLRequest(url: Uri.parse('https://example.com')),
        onDownloadStart: (controller, url) {
          // Handle file download here
        },
        onWebViewCreated: (controller) {
          _webViewController = controller;
        },
      ),
    );
  }
}

In the above example, the InAppWebView widget is used to display a WebView. The initialUrlRequest property is set to the desired URL you want to load in the WebView.

The onDownloadStart callback is triggered when a file download is started from the WebView. Inside this callback, you can handle the file download by using third-party packages like flutter_downloader or universal_html.

The onWebViewCreated callback assigns the created WebView controller to the _webViewController variable, which you can use to control the WebView programmatically.

Make sure to add necessary permissions for file download in your AndroidManifest.xml file:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Remember to modify the above code to suit your specific requirements and URL.

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