使用flutter设计一个蓝牙控制界面，进入页面后，检查申请蓝牙权限，自动搜索显示蓝牙设备列表，搜搜索进度显示，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，以下是您所需的Flutter代码和依赖控件：

依赖控件：

- flutter_blue：用于蓝牙通信
- permission_handler：用于请求蓝牙权限
- connectivity：用于检查设备是否连接到网络
- flutter_spinkit：用于显示搜索进度

代码实现：

1. 引入依赖包

dependencies:
  flutter_blue: ^0.8.1
  permission_handler: ^8.1.2
  connectivity: ^3.0.6
  flutter_spinkit: ^5.1.0

2. 导入依赖包

import 'package:flutter_blue/flutter_blue.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:connectivity/connectivity.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';

3. 创建蓝牙控制页面

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

class _BluetoothControlPageState extends State<BluetoothControlPage> {
  bool _isSearching = false;
  BluetoothDevice _selectedDevice;
  List<BluetoothDevice> _devicesList = [];
  BluetoothCharacteristic _writeCharacteristic;
  TextEditingController _textEditingController = TextEditingController();

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('蓝牙控制'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            _buildSearchButton(),
            SizedBox(height: 16.0),
            _buildDevicesList(),
            SizedBox(height: 16.0),
            _buildControlButtons(),
            SizedBox(height: 16.0),
            _buildTextEditor(),
          ],
        ),
      ),
    );
  }

  Widget _buildSearchButton() {
    return ElevatedButton(
      onPressed: _isSearching ? null : _startScan,
      child: _isSearching
          ? SpinKitThreeBounce(
              color: Colors.white,
              size: 20.0,
            )
          : Text('搜索设备'),
    );
  }

  Widget _buildDevicesList() {
    return Expanded(
      child: ListView.builder(
        itemCount: _devicesList.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(_devicesList[index].name),
            subtitle: Text(_devicesList[index].id.toString()),
            onTap: () {
              setState(() {
                _selectedDevice = _devicesList[index];
              });
            },
          );
        },
      ),
    );
  }

  Widget _buildControlButtons() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: [
        ElevatedButton(
          onPressed: _selectedDevice == null ? null : _sendData,
          child: Text('发送数据'),
        ),
        ElevatedButton(
          onPressed: _selectedDevice == null ? null : _disconnect,
          child: Text('断开连接'),
        ),
      ],
    );
  }

  Widget _buildTextEditor() {
    return Row(
      children: [
        Expanded(
          child: TextField(
            controller: _textEditingController,
            decoration: InputDecoration(
              hintText: '在这里输入数据',
            ),
          ),
        ),
        ElevatedButton(
          onPressed: _selectedDevice == null ? null : _sendData,
          child: Text('发送'),
        ),
      ],
    );
  }

  Future<void> _startScan() async {
    setState(() {
      _isSearching = true;
    });

    // 检查蓝牙权限
    var status = await Permission.bluetooth.request();
    if (status != PermissionStatus.granted) {
      setState(() {
        _isSearching = false;
      });
      return;
    }

    // 检查网络连接
    var result = await Connectivity().checkConnectivity();
    if (result == ConnectivityResult.none) {
      setState(() {
        _isSearching = false;
      });
      return;
    }

    // 开始搜索
    FlutterBlue flutterBlue = FlutterBlue.instance;
    flutterBlue.scan(
      timeout: Duration(seconds: 10),
      onScanResult: (scanResult) {
        if (!_devicesList.contains(scanResult.device)) {
          setState(() {
            _devicesList.add(scanResult.device);
          });
        }
      },
    );

    setState(() {
      _isSearching = false;
    });
  }

  Future<void> _connect() async {
    BluetoothDevice device = _selectedDevice;
    if (device == null) {
      return;
    }

    await device.connect();
    List<BluetoothService> services = await device.discoverServices();
    for (BluetoothService service in services) {
      for (BluetoothCharacteristic characteristic in service.characteristics) {
        if (characteristic.properties.write) {
          _writeCharacteristic = characteristic;
          break;
        }
      }
    }
  }

  Future<void> _disconnect() async {
    BluetoothDevice device = _selectedDevice;
    if (device == null) {
      return;
    }

    await device.disconnect();
    setState(() {
      _selectedDevice = null;
    });
  }

  Future<void> _sendData() async {
    if (_writeCharacteristic == null) {
      return;
    }

    String data = _textEditingController.text;
    await _writeCharacteristic.write(data.codeUnits);
    _textEditingController.clear();
  }
}

以上就是一个简单的蓝牙控制页面的代码实现。