import com.huawei.hiar.AREnginesSelector;
import com.huawei.hiar.ARSession;
import com.huawei.hiar.exceptions.*;

public class HongMengSystem {

private AREnginesSelector arEnginesSelector;// 鸿蒙系统的引擎选择器

public void init() {

    // 初始化鸿蒙系统的引擎选择器，并传入上下文参数，用于实例化AREngine。
    arEnginesSelector = AREnginesSelector.createInstance(context);

    // 确定用户想要使用的AR引擎，可以是HUAWEI AR Engine或者ARKit/ARCore。
    arEnginesSelector.setTargetEngine(ARSessionType);

    // 初始化鸿蒙系统，准备运行。如果初始化失败则会抛出异常。 
    try { 
        arEnginesSelector.init(); 
        LogUtil("Huawei AR Engine initialized");                              } catch (UnavailableServiceNotInstalledException e) { 

        LogUtil("Please install HUAWEI AR Service");   } catch (UnavailableClientSdkTooOldException e) {   LogUtil("Please update HUAWEI AR Service");   } catch (UnavailableArcoreNotInstalledException e) {   LogUtil("Please install Google Play Services for AR");   } catch (UnavailableDeviceNotCompatibleException e) {   LogUtil("This device does not support Huawei AR Engine.");   } catch (Exception e){    LogUtil(e);    return false;  }     return true;}

public void start() throws Exception{     // 启动鸿蒙AREngine服务     if (!arEnginesSelector .resume())         throw new Exception("Failed to start Huawei AREngine service");}     public void stop(){      // 暂停鸿蒙AREngine服务      if (!arEnginesSelector .pause())          throw new Exception("Failed to stop Huawei AREngine service");}       public void destroy(){      // 销毁鸿蒙AREngine服务      if (!arEngines