如何在Unity中获取android的内存根？

package com.example.memoryroot;

import android.app.ActivityManager;
import android.content.Context;

public class MemoryRootHelper {
    public static long getMemoryRoot(Context context) {
        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        ActivityManager.MemoryInfo memoryInfo = new ActivityManager.MemoryInfo();
        activityManager.getMemoryInfo(memoryInfo);
        return memoryInfo.totalMem;
    }
}

using UnityEngine;

public class AndroidMemoryRoot : MonoBehaviour {
    void Start() {
        // 调用Java代码获取Android的内存根
        AndroidJavaClass memoryRootHelperClass = new AndroidJavaClass("com.example.memoryroot.MemoryRootHelper");
        AndroidJavaObject context = new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
        long memoryRoot = memoryRootHelperClass.CallStatic<long>("getMemoryRoot", context);

        // 在Unity中打印Android的内存根
        Debug.Log("Android Memory Root: " + memoryRoot);
    }
}