react-native-external-scan-gun

React native 外接设备(扫码枪、键盘等)

本插件仅测试过外接 USB 扫码枪，其他外接设备若不正常可以在本项目中提 issue

下载

npm install react-native-external-scan-gun 或者 yarn add react-native-external-scan-gun

集成安装(仅支持安卓)

1. 打开 android/app/src/main/java/[...]/MainApplication.java 文件, 并在文件顶部引入插件包，代码 import com.afei.scangun.ScanGunPackage;
2. 打开 android/app/src/main/java/[...]/MainActivity.java 文件, 并添加如下代码

...
import android.view.KeyEvent;
...
import com.afei.scangun.ScanGunManager;
...

public class MainActivity extends ReactActivity {
  ...

  @Override
  public boolean dispatchKeyEvent(KeyEvent event) {
      if (event.getKeyCode() != KeyEvent.KEYCODE_BACK && event.getDeviceId() != -1) {
          ScanGunManager.getInstance().analysisKeyEvent(event);
          return true;
      }
      return super.dispatchKeyEvent(event);
  }

  ...
}

用法

...
import scanGun from 'react-native-external-scan-gun';
...
    useEffect(() => {
      const eventEmitter = new NativeEventEmitter(NativeModules.ToastExample);
      const eventListener = eventEmitter.addListener(
        scanGun.onScanCodeReceiveData,
        code => {
          // TODO: 扫码之后的回调
        },
      );
      return () => {
        // 移除监听事件
        eventListener.remove();
      };
    }, []);
...

备注

以上是基于 expo eject 项目为基础的链接方式，原生项目链接时请参考 React Native