Скачать или смотреть How to Call Native Code in Flutter Desktop for Windows Using Method Channel

Discover how to effectively call native Windows code from your Flutter Desktop applications using `Method Channel`. This guide provides step-by-step instructions for integrating native APIs with Flutter.
---
This video is based on the question https://stackoverflow.com/q/67460070/ asked by the user 'shivanshPurple' ( https://stackoverflow.com/u/8282063/ ) and on the answer https://stackoverflow.com/a/69821423/ provided by the user 'MohsenZ' ( https://stackoverflow.com/u/13698448/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Flutter Desktop Windows: How to call native code via Method Channel. (Make api calls in windows.h header file)

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Call Native Code in Flutter Desktop for Windows Using Method Channel

Flutter is revolutionizing the way we build applications, allowing developers to create beautiful, feature-rich apps across platforms. However, when it comes to integrating with native code, specifically on Windows, many find the documentation sparse. This post addresses the common issue of how to invoke native methods within a Flutter Desktop application on Windows, specifically using the Method Channel.

Understanding the Problem

While Flutter offers incredible capabilities for cross-platform application development, developers often face challenges when they need to access platform-specific features not directly available in Flutter. When developing for Windows, you may want to call functions or use APIs that are part of the native Windows SDK (such as those found in <windows.h>). Unfortunately, there's little documentation on how to achieve this with Flutter on Windows.

Solution Overview

To leverage Windows native code in your Flutter app, you'll need to set up a Method Channel in your Flutter project. This allows the Dart side of the application to communicate with the C++ native side. Below, I break down the necessary steps required to implement a basic method channel.

Step 1: Include Necessary Modules

First, you’ll need to include specific Flutter modules in your flutter_window.cpp file located at your_flutter_project\windows\runner\flutter_window.cpp. Open this file and add the following includes:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Initialize the Method Channel

Next, define a method to initialize the Method Channel before the onCreate() function. Here’s the code to set it up:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Call the Method in onCreate

You should call the initMethodChannel function in the onCreate() function of your FlutterWindow class, right after registering plugins. Update the OnCreate method as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Create a Dart Method Channel

On the Dart side of your Flutter application, you will now create a MethodChannel instance to call the native method defined earlier. Here’s how you can do that in your Dart code:

[[See Video to Reveal this Text or Code Snippet]]

Complete Code Example

Finally, here’s a complete snippet for your modified flutter_window.cpp:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you can now successfully call native Windows code from your Flutter Desktop application using Method Channel. This integration not only enhances the functionality of your application but also opens up a myriad of possibilities for Windows-specific features. If you have any questions or need further assistance, feel free to comment below!