使用flutter设计一个蓝牙控制界面，进入页面后，检查申请代码所需的权限，自动搜索显示蓝牙设备列表，有搜索进度显示，有控制按钮，有通讯输入框和发送功能，支持空安全，请列出代码和依赖控件

好的，我理解了你的要求。下面是一个简单的蓝牙控制界面的Flutter代码，包括搜索蓝牙设备、连接设备、发送数据等功能：

依赖控件：

dependencies:
  flutter:
    sdk: flutter
  permission_handler: ^8.1.2
  flutter_blue: ^0.8.0

代码实现：

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:flutter_blue/flutter_blue.dart';

class BluetoothControlPage extends StatefulWidget {
  @override
  _BluetoothControlPageState createState() => _BluetoothControlPageState();
}

class _BluetoothControlPageState extends State<BluetoothControlPage> {
  final FlutterBlue flutterBlue = FlutterBlue.instance;
  List<BluetoothDevice> devices = [];
  BluetoothDevice? device;
  BluetoothCharacteristic? characteristic;
  bool isConnecting = false;
  bool isConnected = false;
  bool isSending = false;
  String message = "";
  TextEditingController messageController = TextEditingController();

  @override
  void initState() {
    super.initState();
    checkPermissions();
  }

  @override
  void dispose() {
    messageController.dispose();
    super.dispose();
  }

  Future<void> checkPermissions() async {
    Map<Permission, PermissionStatus> statuses = await [
      Permission.location,
    ].request();
    if (statuses[Permission.location] != PermissionStatus.granted) {
      // 如果未授权，则提示用户授权
      showDialog(
        context: context,
        builder: (_) => AlertDialog(
          title: Text("需要位置权限"),
          content: Text("请授权以搜索蓝牙设备"),
          actions: [
            TextButton(
              onPressed: () {
                Navigator.pop(context);
              },
              child: Text("取消"),
            ),
            TextButton(
              onPressed: () async {
                await openAppSettings();
                Navigator.pop(context);
              },
              child: Text("去设置"),
            ),
          ],
        ),
      );
    } else {
      startScan();
    }
  }

  Future<void> startScan() async {
    flutterBlue.scanResults.listen((results) {
      // 扫描到设备时更新设备列表
      setState(() {
        devices = results.map((r) => r.device).toList();
      });
    });
    await flutterBlue.startScan(timeout: Duration(seconds: 4));
    flutterBlue.stopScan();
  }

  Future<void> connectDevice(BluetoothDevice d) async {
    setState(() {
      isConnecting = true;
    });
    await d.connect();
    setState(() {
      device = d;
      isConnecting = false;
      isConnected = true;
    });
    List<BluetoothService> services = await device!.discoverServices();
    services.forEach((service) {
      service.characteristics.forEach((c) {
        if (c.uuid.toString() == "0000ffe1-0000-1000-8000-00805f9b34fb") {
          characteristic = c;
        }
      });
    });
    if (characteristic == null) {
      // 如果未找到特征，则提示用户
      showDialog(
        context: context,
        builder: (_) => AlertDialog(
          title: Text("未找到特征"),
          content: Text("请确保设备已连接并正确配置"),
          actions: [
            TextButton(
              onPressed: () {
                Navigator.pop(context);
              },
              child: Text("确定"),
            ),
          ],
        ),
      );
    }
  }

  Future<void> disconnectDevice() async {
    await device?.disconnect();
    setState(() {
      device = null;
      isConnected = false;
      characteristic = null;
    });
  }

  Future<void> sendMessage(String message) async {
    if (characteristic == null) {
      // 如果未找到特征，则提示用户
      showDialog(
        context: context,
        builder: (_) => AlertDialog(
          title: Text("未找到特征"),
          content: Text("请确保设备已连接并正确配置"),
          actions: [
            TextButton(
              onPressed: () {
                Navigator.pop(context);
              },
              child: Text("确定"),
            ),
          ],
        ),
      );
      return;
    }
    setState(() {
      isSending = true;
    });
    List<int> bytes = utf8.encode(message);
    await characteristic!.write(bytes);
    setState(() {
      isSending = false;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("蓝牙控制"),
      ),
      body: SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Padding(
              padding: EdgeInsets.all(16),
              child: Text(
                "可用设备",
                style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
              ),
            ),
            ListView.builder(
              shrinkWrap: true,
              physics: NeverScrollableScrollPhysics(),
              itemCount: devices.length,
              itemBuilder: (context, index) {
                BluetoothDevice d = devices[index];
                return ListTile(
                  title: Text(d.name.isEmpty ? "未知设备" : d.name),
                  subtitle: Text(d.id.toString()),
                  trailing: ElevatedButton(
                    onPressed: isConnecting
                        ? null
                        : () async {
                            await connectDevice(d);
                          },
                    child: isConnecting
                        ? SizedBox(
                            width: 16,
                            height: 16,
                            child: CircularProgressIndicator(
                              strokeWidth: 2,
                            ),
                          )
                        : Text("连接"),
                  ),
                );
              },
            ),
            if (isConnected)
              Padding(
                padding: EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      "控制",
                      style:
                          TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
                    ),
                    Row(
                      children: [
                        ElevatedButton(
                          onPressed: isSending
                              ? null
                              : () async {
                                  await sendMessage("1");
                                },
                          child: isSending ? Text("发送中") : Text("开灯"),
                        ),
                        SizedBox(
                          width: 16,
                        ),
                        ElevatedButton(
                          onPressed: isSending
                              ? null
                              : () async {
                                  await sendMessage("0");
                                },
                          child: isSending ? Text("发送中") : Text("关灯"),
                        ),
                      ],
                    ),
                    SizedBox(
                      height: 16,
                    ),
                    TextField(
                      controller: messageController,
                      decoration: InputDecoration(
                        labelText: "发送数据",
                        border: OutlineInputBorder(),
                      ),
                    ),
                    SizedBox(
                      height: 16,
                    ),
                    ElevatedButton(
                      onPressed: isSending
                          ? null
                          : () async {
                              await sendMessage(messageController.text);
                            },
                      child: isSending ? Text("发送中") : Text("发送"),
                    ),
                    SizedBox(
                      height: 16,
                    ),
                    ElevatedButton(
                      onPressed: isConnecting
                          ? null
                          : () async {
                              await disconnectDevice();
                            },
                      child: Text("断开连接"),
                    ),
                  ],
                ),
              ),
          ],
        ),
      ),
    );
  }
}

上面的代码实现了蓝牙设备搜索、连接和数据发送的基本功能，可以根据实际需求进行修改和完善。