yichael_smartbow/Assets/BowArrow/Scripts/Expand/GPSTool.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GPSTool
{
    public static string[] GetAddress()
    {
        string[] address = null;
        using (var clsU3D = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
        {
            using (var objCtx = clsU3D.GetStatic<AndroidJavaObject>("currentActivity"))
            {
                using (var objGPSTool = new AndroidJavaClass("com.example.smartbowlib.GPSTool"))
                {
                    address = objGPSTool.CallStatic<string[]>("getAddress", objCtx);
                }
            }
        }
        return address;
    }
}