uts调用原生kt文件报错，请教一下

// index.uts  
import Context from "android.content.Context";  

export function getBatteryLevel() : Int {  
    const context = UTSAndroid.getAppContext() as Context  
    return NativeCode.getBatteryLevel(context)  
}

// NativeCode.kt  
package uts.sdk.modules.ottoBatteryLevel;  
import android.content.Context  
import android.os.BatteryManager  

object NativeCode {  
  fun getBatteryLevel(context: Context): Int {  
      val batteryManager = context.getSystemService(Context.BATTERY_SERVICE) as BatteryManager  
      val batteryLevel = batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY)  
      return batteryLevel  
  }  
}

报错内容：
11:45:18.359 ‌error: Unresolved reference: NativeCode‌
11:45:18.359 at uni_modules/test-modules/utssdk/app-android/index.uts:5:8
11:45:18.359 3 | export function getBatteryLevel() : Int {
11:45:18.359 4 | const context = UTSAndroid.getAppContext() as Context
11:45:18.359 5 | return NativeCode.getBatteryLevel(context)
11:45:18.359 | ^
11:45:18.359 6 | }