c# 枚举安卓系统中所有目录及文件名

using Android.App;
using Android.Widget;
using Android.OS;
using System.Runtime.InteropServices;

namespace App2
{
    [Activity(Label = "App2", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        [DllImport("TestDynamicSharedLib.so")]
        public extern static int getClickCount();

        protected override void OnCreate(Bundle bundle)
        {
            var c = getClickCount();

            //string folderPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.System);

            printAllSubFiles("/");

            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            // SetContentView (Resource.Layout.Main);
        }

        void printAllSubFiles(string path)
        {
            System.Diagnostics.Debug.Print("dir:" + path);

            var dir = new System.IO.DirectoryInfo(path);

            try
            {
                foreach (var f in dir.GetFiles())
                {
                    System.Diagnostics.Debug.Print("file:" + f.FullName);
                }
            }
            catch 
            {
                //throw;
            }

            try
            {
                foreach (var d in dir.GetDirectories())
                {
                    printAllSubFiles(d.FullName);
                }
            }
            catch (System.Exception)
            {
                //throw;
            }
            
        }
    }
}