Angular Nativescript:在线程内进行地理定位？

当我试图在工作线程上使用Geolocation inside时，程序会崩溃，并出现下一个错误

Error From Geolocation: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference
JS:     com.google.android.gms.common.GooglePlayServicesUtilLight.isGooglePlayServicesAvailable(Unknown Source)
JS:     com.google.android.gms.common.GoogleApiAvailabilityLight.isGooglePlayServicesAvailable(Unknown Source)
JS:     com.google.android.gms.common.GoogleApiAvailability.isGooglePlayServicesAvailable(Unknown Source)
JS:     com.google.android.gms.common.GoogleApiAvailabilityLight.isGooglePlayServicesAvailable(Unknown Source)
JS:     com.google.android.gms.common.GoogleApiAvailability.isGooglePlayServicesAvailable(Unknown Source)
JS:     com.tns.Runtime.callJSMethodNative(Native Method)
JS:     com.tns.Runtime.dispatchCallJSMethodNative(Runtime.java:1203)
JS:     com.tns.Runtime.callJSMethodImpl(Runtime.java:1083)
JS:     com.tns.Runtime.callJSMethod(Runtime.java:1070)
JS:     com.tns.Runtime.callJSMethod(Runtime.java:1050)
JS:     com.tns.Runtime.callJSMethod(Runtime.java:1042)
JS:     com...

但当我从任何组件内部使用地理定位时，都不会发生这种情况，例如：

{
JS:   "android": {},
JS:   "latitude": 0,
JS:   "longitude": 0,
JS:   "altitude": 0,
JS:   "horizontalAccuracy": 0,
JS:   "verticalAccuracy": 0,
JS:   "speed": 0,
JS:   "direction": 0,
JS:   "timestamp": "2019-12-20T16:40:47.000Z"
JS: }

这是我的线

// app/worker.ts
import "globals";
import * as Geolocation from 'nativescript-geolocation';
import { Accuracy } from "tns-core-modules/ui/enums";

const context: Worker = self as any;

context.onmessage = function(msg) {
    Geolocation.getCurrentLocation({desiredAccuracy: 3, updateDistance: 10, maximumAge: 20000,timeout: 20000})
    .then(function(loc) {
             console.log(loc);
    }, function(e){              
             console.log("Error From Geolocation: " + e.message);
    });
};

---

我想知道是否存在在线程内使用地理位置的任何方法

在访问worker上的位置之前，您是否从主线程获得了位置权限？是的，所有权限都已启用