React Native BLE PLX Demo：无线通信的新境界

以下是React Native BLE PLX Demo中的核心函数，展示了如何初始化蓝牙适配器，以及如何扫描和连接到BLE设备。

import React, { useEffect, useState } from 'react';
import { StyleSheet, Text, View, Button } from 'react-native';
import bleplx from 'react-native-ble-plx';
 
const App = () => {
  const [scanning, setScanning] = useState(false);
  const [devices, setDevices] = useState([]);
  const ble = bleplx.default;
 
  useEffect(() => {
    const initBle = async () => {
      await ble.initialize();
      console.log('BLE Initialized');
    };
    initBle();
  }, []);
 
  const startScan = async () => {
    setScanning(true);
    const scan = await ble.scan([], true);
 
    scan.on('discover', device => {
      console.log(device);
      setDevices(devices => [...devices, device]);
    });
 
    scan.on('end', () => {
      console.log('Scan end');
      setScanning(false);
    });
  };
 
  const stopScan = async () => {
    setScanning(false);
    await ble.stopScan();
  };
 
  return (
    <View style={styles.container}>
      <Text>Bluetooth Low Energy Plugin Example</Text>
      <Button title="Scan" onPress={startScan} disabled={scanning} />
      <Button title="Stop" onPress={stopScan} disabled={!scanning} />
      <Text>Devices found: {devices.length}</Text>
    </View>
  );
};
 
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
});
 
export default App;

这段代码展示了如何在React Native应用中使用react-native-ble-plx库进行蓝牙低能耗（BLE）扫描和设备发现。代码中定义了一个React组件，其中包含初始化蓝牙适配器、开始和停止扫描的逻辑，以及如何处理扫描到的设备信息。这为开发者提供了一个实践的蓝牙低能耗通信的例子。