javascript channel flutter inappWebview
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Using the JavaScript Channel in Flutter's InAppWebView
To communicate between Flutter and JavaScript in an InAppWebView, you can utilize the JavaScript channel provided by the flutter_inappwebview package. This allows you to send messages from Flutter to JavaScript and vice versa.
Here's an example of how you can set up the JavaScript channel in Flutter:
- Import the required packages:
dart
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
- Create an instance of
InAppWebViewControllerto interact with the web view:
dart
InAppWebViewController _webViewController;
- Set up the JavaScript channel:
dart
JavascriptChannel _flutterChannel(BuildContext context) {
return JavascriptChannel(
name: 'FlutterChannel',
onMessageReceived: (JavascriptMessage message) {
// Handle messages received from JavaScript
var data = message.message;
// Do something with the data
},
);
}
- Inject the JavaScript channel into the web view, along with the URL:
dart
InAppWebView(
initialUrlRequest: URLRequest(url: Uri.parse('your_url_here')),
initialOptions: InAppWebViewGroupOptions(
android: AndroidInAppWebViewOptions(
useHybridComposition: true,
),
crossPlatform: InAppWebViewOptions(
javaScriptChannels: [
_flutterChannel(context).toJavascriptChannel(),
].toSet(),
),
),
onWebViewCreated: (controller) {
_webViewController = controller;
},
);
- Send messages from Flutter to JavaScript:
dart
_webViewController.evaluateJavascript('your_js_code_here');
- Send messages from JavaScript to Flutter:
javascript
FlutterChannel.postMessage('your_message_here');
That's it! You can now send messages between Flutter and JavaScript using the JavaScript channel in the InAppWebView.
Please note that this is just a basic example, and you can customize it based on your specific requirements. Ensure that you handle the messages received from JavaScript appropriately in the onMessageReceived callback.
I hope this helps! Let me know if you have any further questions.