Flutter EDID信息获取插件edid的使用

在Flutter中，如果你想获取显示器的EDID（Extended Display Identification Data）信息，你可以使用第三方插件或编写自定义的插件来实现。目前，Flutter社区中并没有一个广泛使用的、专门用于获取EDID信息的插件，因此你可能需要自己编写或使用现有的平台通道（Platform Channels）来调用原生代码。

1. 使用平台通道（Platform Channels）

Flutter提供了平台通道（Platform Channels）机制，允许你调用原生代码（如Android的Java/Kotlin或iOS的Objective-C/Swift）来获取EDID信息。

步骤：

1. 创建Flutter项目： 首先，创建一个新的Flutter项目。

2. 添加平台通道： 在lib/main.dart中，定义一个平台通道来调用原生代码。

   import 'package:flutter/material.dart';
   import 'package:flutter/services.dart';
   
   class EDIDInfo {
     static const MethodChannel _channel = MethodChannel('edid_info');
   
     static Future<String> getEDID() async {
       try {
         final String edid = await _channel.invokeMethod('getEDID');
         return edid;
       } on PlatformException catch (e) {
         return "Failed to get EDID: ${e.message}";
       }
     }
   }
   
   void main() {
     runApp(MyApp());
   }
   
   class MyApp extends StatelessWidget {
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
         home: Scaffold(
           appBar: AppBar(
             title: Text('EDID Info'),
           ),
           body: Center(
             child: FutureBuilder<String>(
               future: EDIDInfo.getEDID(),
               builder: (context, snapshot) {
                 if (snapshot.connectionState == ConnectionState.waiting) {
                   return CircularProgressIndicator();
                 } else if (snapshot.hasError) {
                   return Text('Error: ${snapshot.error}');
                 } else {
                   return Text('EDID: ${snapshot.data}');
                 }
               },
             ),
           ),
         ),
       );
     }
   }
   

3. 实现Android原生代码： 在android/app/src/main/kotlin/com/example/your_app/MainActivity.kt中，实现获取EDID信息的逻辑。

   package com.example.your_app
   
   import android.os.Build
   import android.view.Display
   import androidx.annotation.NonNull
   import io.flutter.embedding.android.FlutterActivity
   import io.flutter.embedding.engine.FlutterEngine
   import io.flutter.plugin.common.MethodChannel
   
   class MainActivity: FlutterActivity() {
       private val CHANNEL = "edid_info"
   
       override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
           super.configureFlutterEngine(flutterEngine)
           MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
               if (call.method == "getEDID") {
                   val edid = getEDID()
                   result.success(edid)
               } else {
                   result.notImplemented()
               }
           }
       }
   
       private fun getEDID(): String {
           if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
               val displayManager = getSystemService(DISPLAY_SERVICE) as android.hardware.display.DisplayManager
               val display = displayManager.getDisplay(Display.DEFAULT_DISPLAY)
               val displayInfo = display.displayInfo
               return displayInfo.toString() // 这里需要根据实际情况解析EDID信息
           }
           return "EDID not available"
       }
   }
   

4. 实现iOS原生代码： 在ios/Runner/AppDelegate.swift中，实现获取EDID信息的逻辑。

   import UIKit
   import Flutter
   
   [@UIApplicationMain](/user/UIApplicationMain)
   [@objc](/user/objc) class AppDelegate: FlutterAppDelegate {
       override func application(
           _ application: UIApplication,
           didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
       ) -> Bool {
           let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
           let edidChannel = FlutterMethodChannel(name: "edid_info",
                                                 binaryMessenger: controller.binaryMessenger)
           edidChannel.setMethodCallHandler({
               (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
               if call.method == "getEDID" {
                   self.getEDID(result: result)
               } else {
                   result(FlutterMethodNotImplemented)
               }
           })
   
           GeneratedPluginRegistrant.register(with: self)
           return super.application(application, didFinishLaunchingWithOptions: launchOptions)
       }
   
       private func getEDID(result: FlutterResult) {
           // 这里需要根据实际情况解析EDID信息
           result("EDID not available on iOS")
       }
   }
   

2. 使用现有的插件

如果你不想自己编写原生代码，可以搜索Flutter社区中是否有现成的插件。你可以通过以下命令在pub.dev上搜索相关插件：

flutter pub search edid