在Flutter中，device_policy_manager 并不是一个官方或广泛认可的插件，用于设备管理策略。然而，Flutter应用可以通过平台通道（Platform Channels）与原生代码（如Android的Java/Kotlin代码或iOS的Swift/Objective-C代码）进行交互，从而实现类似设备管理策略的功能。

以下是一个简化的示例，展示如何在Flutter中通过平台通道调用Android的设备管理API。请注意，由于iOS的设备管理策略与Android有显著差异，这里仅展示Android部分的实现。

1. 创建Flutter插件

首先，我们需要创建一个Flutter插件，以便在Flutter和原生Android代码之间建立通信。

Flutter代码（lib/device_policy_manager.dart）

import 'dart:async';

import 'package:flutter/services.dart';

class DevicePolicyManager {
  static const MethodChannel _channel = MethodChannel('plugins.flutter.io/device_policy_manager');

  static Future<bool> lockNow() async {
    final bool result = await _channel.invokeMethod('lockNow');
    return result;
  }

  static Future<bool> wipeData(String password) async {
    final bool result = await _channel.invokeMethod('wipeData', {'password': password});
    return result;
  }
}

Android原生代码（android/app/src/main/java/com/example/device_policy_manager/DevicePolicyManagerPlugin.java）

package com.example.device_policy_manager;

import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.os.Bundle;

import androidx.annotation.NonNull;

import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityAware;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;

public class DevicePolicyManagerPlugin implements FlutterPlugin, MethodCallHandler, ActivityAware {
    private MethodChannel channel;
    private Context applicationContext;
    private DevicePolicyManager devicePolicyManager;
    private ComponentName adminComponent;

    @Override
    public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBinding) {
        channel = new MethodChannel(flutterPluginBinding.getBinaryMessenger(), "plugins.flutter.io/device_policy_manager");
        channel.setMethodCallHandler(this);
        applicationContext = flutterPluginBinding.getApplicationContext();
        adminComponent = new ComponentName(applicationContext, MyDeviceAdminReceiver.class);
        devicePolicyManager = (DevicePolicyManager) applicationContext.getSystemService(Context.DEVICE_POLICY_SERVICE);
    }

    @Override
    public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
        if (call.method.equals("lockNow")) {
            if (devicePolicyManager.isAdminActive(adminComponent)) {
                devicePolicyManager.lockNow();
                result.success(true);
            } else {
                result.error("NOT_ADMIN", "DevicePolicyManager is not active", null);
            }
        } else if (call.method.equals("wipeData")) {
            Bundle extras = new Bundle();
            String password = call.argument("password");
            extras.putString("com.android.internal.R.string.lockscreen.password", password);
            if (devicePolicyManager.isAdminActive(adminComponent)) {
                devicePolicyManager.wipeData(adminComponent, extras);
                result.success(true);
            } else {
                result.error("NOT_ADMIN", "DevicePolicyManager is not active", null);
            }
        } else {
            result.notImplemented();
        }
    }

    @Override
    public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
        channel.setMethodCallHandler(null);
    }

    @Override
    public void onAttachedToActivity(ActivityPluginBinding binding) {
        // No-op
    }

    @Override
    public void onDetachedFromActivityForConfigChanges() {
        // No-op
    }

    @Override
    public void onReattachedToActivityForConfigChanges(ActivityPluginBinding binding) {
        // No-op
    }

    @Override
    public void onDetachedFromActivity() {
        // No-op
    }
}

Android原生代码（android/app/src/main/java/com/example/device_policy_manager/MyDeviceAdminReceiver.java）

package com.example.device_policy_manager;

import android.app.admin.DeviceAdminReceiver;
import android.content.Context;
import android.content.Intent;

public class MyDeviceAdminReceiver extends DeviceAdminReceiver {
    @Override
    public void onEnabled(Context context, Intent intent) {
        super.onEnabled(context, intent);
        // Handle device admin enabled
    }

    @Override
    public void onDisabled(Context context, Intent intent) {
        super.onDisabled(context, intent);
        // Handle device admin disabled
    }
}

2. 配置AndroidManifest.xml

在AndroidManifest.xml中添加设备管理员权限和声明接收器。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.device_policy_manager">

    <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>

    <receiver android:name=".MyDeviceAdminReceiver"
        android:label="@string/app_name"
        android:permission="android.permission.BIND_DEVICE_ADMIN">
        <meta-data android:name="android.app.device_admin"
            android:resource="@xml/device_admin_receiver" />
        <intent-filter>
            <action android:name="android.app.action.DEVICE_ADMIN_ENABLED" />
            <action android:name="android.app.action.DEVICE_ADMIN_DISABLED" />
        </intent-filter>
    </receiver>

    <!-- Add other required configurations -->

</manifest>

并在res/xml/device_admin_receiver.xml中定义设备管理员配置：

<?xml version="1.0" encoding="utf-8"?>
<device-admin xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-policies>
        <force-lock />
        <wipe-data />
    </uses-policies>
</device-admin>

3. 使用插件

最后，在你的Flutter应用中使用创建的插件：

import 'package:flutter/material.dart';
import 'device_policy_manager.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Device Policy Manager Demo'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                onPressed: () async {
                  bool result = await DevicePolicyManager.lockNow();
                  if (result) {
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Device locked')));
                  } else {
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Failed to lock device')));
                  }
                },
                child: Text('Lock Device'),
              ),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: () async {
                  String password = "your_wipe_password"; // Replace with actual password
                  bool result = await DevicePolicyManager.wipeData(password);
                  if (result) {
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Data wiped')));
                  } else {
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Failed to wipe data')));
                  }
                },
                child: Text('Wipe Data'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

注意：上述代码仅作为示例