unity之获取设备磁盘空间大小

IOS ：

//获取磁盘空间总大小
-(float)GetTotalDiskSpace {
    float totalSpace;    
    NSError *error = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
    
    if (dictionary) {
        NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];
        NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
        totalSpace = ([fileSystemSizeInBytes floatValue])/1000.0f/1000.0f;
      
        NSLog(@"iphone磁盘总大小  =%@",  [[NSString stringWithFormat:@"%.2f",totalSpace]     stringByAppendingString:@"MB"]);       
    } else {
        NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
    }
    return totalSpace;
}

//获取磁盘剩余空间
-(float)GetFreeDiskSpace {    
    float totalFreeSpace;   
    NSError *error = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSDictionary *dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
    
    if (dictionary) {
        NSNumber *fileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemSize];
        NSNumber *freeFileSystemSizeInBytes = [dictionary objectForKey:NSFileSystemFreeSize];
        totalFreeSpace = ([freeFileSystemSizeInBytes floatValue])/1000.0f/1000.0f;                          
        
        NSLog(@"iphone磁盘剩余大小    =%@",  [[NSString stringWithFormat:@"%.2f",totalFreeSpace] stringByAppendingString:@"MB"]);                
    } else {
        NSLog(@"Error Obtaining System Memory Info: Domain = %@, Code = %@", [error domain], [error code]);
    }
    return totalFreeSpace;
}

Android:

unity - C#

using UnityEngine;
using System.Runtime.InteropServices;


/// <summary>
/// 设备机型类
/// </summary>
public static class DeviceModelEx
{
    //获取磁盘空间总大小
    public static int GetTotalMemory()
    {
#if UNITY_ANDROID && !UNITY_EDITOR
        try
        {
            AndroidJavaObject fileReader = new AndroidJavaObject("java.io.FileReader", "/proc/meminfo");
            AndroidJavaObject br = new AndroidJavaObject("java.io.BufferedReader", fileReader, 2048);
            string mline = br.Call<String>("readLine");
            br.Call("close");
            mline = mline.Substring(mline.IndexOf("MemTotal:"));
            mline = Regex.Match(mline, "(\\d+)").Groups[1].Value;
            return (int.Parse(mline) / 1024);
        }
        catch (Exception e)
        {
            if (!Application.isEditor) Debug.LogError("GetTotalMemory 获取内存失败:" + e);
            return SystemInfo.systemMemorySize;
        }
#elif UNITY_IPHONE && !UNITY_EDITOR
        int diskSpace = int.MaxValue;
        long value = (long)GetTotalDiskSpace()
        int.TryParse("" + value , out diskSpace);
        return diskSpace;
#endif
        return SystemInfo.systemMemorySize;
    }


    [DllImport("kernel32.dll", EntryPoint = "GetDiskFreeSpaceEx")]
    public static extern int GetDiskFreeSpaceEx(string lpDirectoryName, out long lpFreeBytesAvailable, out long lpTotalNumberOfBytes, out long lpTotalNumberOfFreeBytes);

    /// <summary>
    /// 获取磁盘剩余空间
    /// </summary>
    /// <returns></returns>
    public static int GetFreeDiskSpace()
    {
        int diskSpace = int.MaxValue;
#if UNITY_ANDROID && !UNITY_EDITOR
        AndroidJavaClass unityPluginLoader = new AndroidJavaClass("com.woogiworld.hlextends.DiskSpace");
        long value = unityPluginLoader.CallStatic<long>("GetFreeDiskSpace");
        int.TryParse("" + value , out diskSpace);
        return diskSpace;

#elif UNITY_IPHONE && !UNITY_EDITOR
        long value = (long)GetFreeDiskSpace()
        int.TryParse("" + value , out diskSpace);
        return diskSpace;
#endif
        return SystemInfo.systemMemorySize;
    }



    //[CSharpCallLua]
    public delegate bool LuaReadAndroidInfCallBack(string target);
    public static void CallReadAndroidInfoFun(string infoPath, LuaReadAndroidInfCallBack luaCallfun)
    {
#if UNITY_EDITOR
        try
        {
            if (string.IsNullOrEmpty(infoPath))
            {
                if (luaCallfun != null) luaCallfun(null);
                return;
            }
            var fileReader = new AndroidJavaObject("java.io.FileReader", infoPath);
            if (fileReader == null)
            {
                if (luaCallfun != null) luaCallfun(null);
                return;
            }
            var br = new AndroidJavaObject("java.io.BufferedReader", fileReader, 2048);
            if (br == null)
            {
                if (luaCallfun != null) luaCallfun(null);
                return;
            }
            string mline = "";
            while ((mline = br.Call<string>("readLine")) != null)
            {
                if (luaCallfun == null) break;
                if (!luaCallfun(mline)) break;
            }
            br.Call("close");
        }
        catch (System.Exception e)
        {
            Debug.LogError(e.ToString());
        }
#endif
        if (luaCallfun != null) luaCallfun(null);
    }


    /// <summary>
    /// 0 运行在非 AndroidSimulator
    /// 1 运行在 AndroidSimulator 
    /// -1 表示未进行初始化
    /// </summary>
    private static int _isRunAndroidSimulator = -1;

    /// <summary>
    /// 判断是否运行在安卓模拟器上面
    /// 判断依据是 通过模拟器无法模拟 Mac地址的属性 通过mac地址是否存在来判断
    /// 注意的是可以以这样来判断 但是此处mac地址不能使用 
    /// 这个方法Android 7.0是获取不到的，都会返回“02:00:00:00:00:00”
    /// </summary>
    /// <returns></returns>
    public static bool IsRunAndroidSimulator()
    {
        if (_isRunAndroidSimulator == -1)
        {
#if UNITY_ANDROID && !UNITY_EDITOR
                _isRunAndroidSimulator = 0;
                try
                {
                    AndroidJavaObject fileReader = new AndroidJavaObject("java.io.FileReader", "/proc/diskstats");
                    AndroidJavaObject br = new AndroidJavaObject("java.io.BufferedReader", fileReader, 2048);
                    bool isMmcblk0 = false;
                    string mline = "";
                    while ((mline = br.Call<String>("readLine")) != null)
                    {
                        if (mline.IndexOf("mmcblk0") == -1) continue;
                        isMmcblk0 = true;
                        break;
                    }
                    br.Call("close");

                    if (!isMmcblk0)
                    {
                        //如果芯片是 x86  则认为是模拟器
                        if (SystemInfo.processorType.ToLower().IndexOf("intel x86") != -1)
                        {
                            _isRunAndroidSimulator = 1;
                            return true;
                        }
                        AndroidJavaClass roSecureObj = new AndroidJavaClass("android.os.SystemProperties");
                        AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
                        AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");
                        AndroidJavaObject unityContext = unityActivity.Call<AndroidJavaObject>("getPackageManager");
                        //闪光灯检测
                        var isflash = unityContext.Call<Boolean>("hasSystemFeature", "android.hardware.camera.flash");
                        if (!isflash)
                        {
                            _isRunAndroidSimulator = 1;
                            return true;
                        }
                        //ro.hardware
                        var hardware = roSecureObj.CallStatic<String>("get", "ro.hardware");
                        if (!string.IsNullOrEmpty(hardware))
                        {
                            hardware = hardware.ToLower();
                            if (hardware.Contains("ttvm") || hardware.Contains("nox") || hardware.Contains("_x86") || hardware.EndsWith("x86"))
                            {
                                _isRunAndroidSimulator = 1;
                                return true;
                            }
                        }
                    }
                }
                catch
                {
                    if (!SystemInfo.supportsGyroscope || !SystemInfo.supportsVibration) return true;
                }
#else
            _isRunAndroidSimulator = 0;
#endif
        }
        return _isRunAndroidSimulator == 1;
    }


}

Android - java:

package com.woogiworld.hlextends;

import android.os.Environment;
import android.os.StatFs;

import java.io.File;

public class DiskSpace {

    public static long GetFreeDiskSpace() {
        try {
            File file = Environment.getDataDirectory();
            StatFs sf = new StatFs(file.getPath());
            return sf.getAvailableBytes() / (1024 * 1024);
        } catch (Throwable e) {
            return -1;
        }
    }
}