U3D导出到安卓apk的日志打印管理

虽然U3D提供真机调试，但是由于内外网的隔离，使得这个流程比较麻烦和不太靠谱。真机调试的另一个方法是查看游戏运行导出的Log日志（U3D的Application.persistentDataPath路径下），下面是一个常用的log日志类

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;


public class OutputLog : MonoBehaviour 
{
    public static OutputLog instance = null;
    private string err;
    private string log;
    private string filePath;
    private bool isDebugMode = false;

    void Awake()
    {
        filePath = Application.persistentDataPath + "/P1_log.txt";
        if (System.IO.File.Exists(filePath))
        {
            File.Delete(filePath);
        }
        instance = this;
        Application.RegisterLogCallback(HandleLog);
        Debug.Log(filePath);
    }

    void OnDestroy()
    {
        instance = null;
        Applica