android - play video in Web View

Android - play video in Web View

To play a video in a WebView on Android, you need to handle the video playback using HTML5 <video> tag within the WebView. Here's a step-by-step guide on how to achieve this:

1. Set up your Android Project

Ensure you have a basic Flutter project set up. If not, you can create one using:

flutter create my_webview_project

2. Add Webview Flutter Plugin

Add the webview_flutter dependency to your pubspec.yaml file:

dependencies: flutter: sdk: flutter webview_flutter: ^2.0.14 # Replace with the latest version

Run flutter pub get to install the plugin.

3. Implement WebView in Flutter

Now, implement a WebView in your Flutter code. Here's an example:

import 'package:flutter/material.dart'; import 'package:webview_flutter/webview_flutter.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: WebViewPage(), ); } } class WebViewPage extends StatefulWidget { @override _WebViewPageState createState() => _WebViewPageState(); } class _WebViewPageState extends State<WebViewPage> { @override void initState() { super.initState(); // Enable hybrid composition for the webview to play video WebView.platform = SurfaceAndroidWebView(); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('WebView Video Player'), ), body: WebView( initialUrl: 'https://www.example.com/video.html', // Replace with your video URL javascriptMode: JavascriptMode.unrestricted, ), ); } }

4. HTML File (video.html)

Create a simple HTML file (video.html) that contains the <video> tag with your video source:

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Video Player</title> </head> <body> <video width="100%" height="auto" controls> <source src="https://www.example.com/video.mp4" type="video/mp4"> Your browser does not support the video tag. </video> </body> </html>

Replace "https://www.example.com/video.mp4" with the URL of your video file.

Explanation:

  • WebView Initialization: WebView.platform = SurfaceAndroidWebView(); is used to enable hybrid composition for the webview, which is necessary for video playback in some scenarios.

  • WebView Widget: The WebView widget is used to display the HTML content containing the <video> tag. It loads the video.html file from a specified URL.

  • HTML Video Tag: The <video> tag in video.html specifies the video source (src) and includes fallback content for browsers that do not support video playback.

Additional Considerations:

  • Video Formats: Ensure your video file (video.mp4) is in a format supported by HTML5 video (mp4, webm, ogg, etc.).

  • WebView Settings: Adjust WebView settings as per your requirements, such as enabling/disabling JavaScript or handling navigation events.

  • Error Handling: Implement error handling in Flutter and in your HTML/JS code to manage cases where the video cannot be loaded or played.

By following these steps, you can integrate a WebView in your Flutter application to play videos using HTML5 <video> tag. Customize the implementation according to your specific video source and application requirements.

Examples

  1. "How to enable video playback in WebView?"

    Description: You need to enable JavaScript and set a WebChromeClient to support video playback.

    Code:

    val webView: WebView = findViewById(R.id.webView) webView.settings.javaScriptEnabled = true webView.webChromeClient = WebChromeClient()

  2. "How to load a video URL in WebView?"

    Description: Use the loadUrl method to load a video URL directly into the WebView.

    Code:

    webView.loadUrl("https://www.example.com/video.mp4")

  3. "How to handle video fullscreen in WebView?"

    Description: Override the onShowCustomView method in WebChromeClient to manage fullscreen videos.

    Code:

    webView.webChromeClient = object : WebChromeClient() { override fun onShowCustomView(view: View, requestedOrientation: Int) { // Handle fullscreen view } }

  4. "How to pause and resume video in WebView?"

    Description: Use the onPause and onResume lifecycle methods to control video playback.

    Code:

    override fun onPause() { super.onPause() webView.onPause() } override fun onResume() { super.onResume() webView.onResume() }

  5. "How to handle WebView errors during video playback?"

    Description: Implement onReceivedError in WebViewClient to manage playback errors.

    Code:

    webView.webViewClient = object : WebViewClient() { override fun onReceivedError( view: WebView?, request: WebResourceRequest?, error: WebResourceError? ) { // Handle the error } }

  6. "How to play YouTube videos in WebView?"

    Description: Load the YouTube video URL in the WebView to enable playback.

    Code:

    webView.loadUrl("https://www.youtube.com/watch?v=VIDEO_ID")

  7. "How to control video playback with JavaScript in WebView?"

    Description: Use evaluateJavascript to control video playback from your Android code.

    Code:

    webView.evaluateJavascript("document.getElementById('video').play();", null)

  8. "How to detect when video ends in WebView?"

    Description: Use JavaScript to listen for the ended event of the video.

    Code:

    val js = "document.getElementById('video').addEventListener('ended', function() { Android.onVideoEnded(); });" webView.evaluateJavascript(js, null)

  9. "How to customize video controls in WebView?"

    Description: Override the default video controls with your own using HTML/CSS.

    Code:

    <video controls> <source src="video.mp4" type="video/mp4"> </video>

  10. "How to clear WebView cache for video playback?"

    Description: Clear the cache before loading a new video to avoid playback issues.

    Code:

    webView.clearCache(true) webView.loadUrl("https://www.example.com/video.mp4")

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