如何在后台捕捉事件按下解锁/锁定按钮(物理)- Google Flutter

import 'package:flutter/services.dart';

const platform = const MethodChannel('com.example.app/lock_button');

// 监听物理按键事件
platform.setMethodCallHandler((call) async {
  if (call.method == 'onLockButtonPressed') {
    // 解锁按钮按下的处理逻辑
    // ...
  } else if (call.method == 'onUnlockButtonPressed') {
    // 锁定按钮按下的处理逻辑
    // ...
  }
});

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

public class LockButtonReceiver extends BroadcastReceiver {
    private static final String LOCK_BUTTON_ACTION = "android.intent.action.LOCK_BUTTON";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(LOCK_BUTTON_ACTION)) {
            if (intent.getIntExtra("android.intent.extra.KEY_EVENT", 0) == 0) {
                // 解锁按钮按下
                MethodChannel channel = new MethodChannel(
                        FlutterMain.getLookupKeyForAsset("flutter_assets/flutter_lock_button"));
                channel.invokeMethod("onLockButtonPressed", null);
            } else {
                // 锁定按钮按下
                MethodChannel channel = new MethodChannel(
                        FlutterMain.getLookupKeyForAsset("flutter_assets/flutter_lock_button"));
                channel.invokeMethod("onUnlockButtonPressed", null);
            }
        }
    }

    public static void register(Context context) {
        IntentFilter filter = new IntentFilter();
        filter.addAction(LOCK_BUTTON_ACTION);
        context.registerReceiver(new LockButtonReceiver(), filter);
    }

    public static void unregister(Context context) {
        context.unregisterReceiver(new LockButtonReceiver());
    }
}

import Flutter

class LockButtonObserver {
    static func startObserving() {
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(onLockButtonPressed),
            name: UIApplication.willResignActiveNotification,
            object: nil
        )
        
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(onUnlockButtonPressed),
            name: UIApplication.didBecomeActiveNotification,
            object: nil
        )
    }
    
    static func stopObserving() {
        NotificationCenter.default.removeObserver(self)
    }
    
    @objc static func onLockButtonPressed() {
        let channel = FlutterMethodChannel(
            name: "com.example.app/lock_button",
            binaryMessenger: FlutterViewController().binaryMessenger
        )
        channel.invokeMethod("onLockButtonPressed", arguments: nil)
    }
    
    @objc static func onUnlockButtonPressed() {
        let channel = FlutterMethodChannel(
            name: "com.example.app/lock_button",
            binaryMessenger: FlutterViewController().binaryMessenger
        )
        channel.invokeMethod("onUnlockButtonPressed", arguments: nil)
    }
}

void main() {
  LockButtonObserver.startObserving();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Lock Button Demo',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Lock Button Demo'),
        ),
        body: Center(
          child: Text('Press the lock/unlock button'),
        ),
      ),
    );
  }
  
  @override
  void dispose() {
    LockButtonObserver.stopObserving();
    super.dispose();
  }
}