customer / shanghai-railway-rnapp

package com.metroapp.forum;

import android.text.TextUtils;
import android.util.Log;
import android.webkit.MimeTypeMap;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.util.Locale;

public class FileUtil {
    private static final String TAG = "FileUtil";

    public static boolean hasExtentsion(String filename) {
        int dot = filename.lastIndexOf('.');
        if ((dot > -1) && (dot < (filename.length() - 1))) {
            return true;
        } else {
            return false;
        }
    }

    // 获取文件扩展名
    public static String getExtensionName(String filename) {
        if ((filename != null) && (filename.length() > 0)) {
            int dot = filename.lastIndexOf('.');
            if ((dot > -1) && (dot < (filename.length() - 1))) {
                return filename.substring(dot + 1);
            }
        }
        return "";
    }

    // 获取文件名
    public static String getFileNameFromPath(String filepath) {
        if ((filepath != null) && (filepath.length() > 0)) {
            int sep = filepath.lastIndexOf('/');
            if ((sep > -1) && (sep < filepath.length() - 1)) {
                return filepath.substring(sep + 1);
            }
        }
        return filepath;
    }

    /**
     * 获取文件名称 带后缀
     * @param filePath
     * @return
     */
    public  static String getFileName(String filePath){

        int start=filePath.lastIndexOf("/");
        if(start!=-1 ){
            return filePath.substring(start+1);
        }else{
            return filePath;
        }
    }

    /***
     * 获取文件类型
     *
     * @param path 文件路径
     * @return 文件的格式
     */
    public static String getFileType(String path) {
        String str = "";

        if (TextUtils.isEmpty(path)) {
            return str;
        }
        int i = path.lastIndexOf('.');
        if (i <= -1) {
            return str;
        }
        str = path.substring(i + 1);
        return str;
    }


    // 获取不带扩展名的文件名
    public static String getFileNameNoEx(String filename) {
        if ((filename != null) && (filename.length() > 0)) {
            int dot = filename.lastIndexOf('.');
            if ((dot > -1) && (dot < (filename.length()))) {
                return filename.substring(0, dot);
            }
        }
        return filename;
    }

    public static String getMimeType(String filePath) {
        if (TextUtils.isEmpty(filePath)) {
            return "";
        }
        String type = null;
        String extension = getExtensionName(filePath.toLowerCase());
        if (!TextUtils.isEmpty(extension)) {
            MimeTypeMap mime = MimeTypeMap.getSingleton();
            type = mime.getMimeTypeFromExtension(extension);
        }
        Log.i(TAG, "url:" + filePath + " " + "type:" + type);

        // FIXME
        if (StringUtil.isEmpty(type) && filePath.endsWith("aac")) {
            type = "audio/aac";
        }

        return type;
    }

    public enum SizeUnit {
        Byte,
        KB,
        MB,
        GB,
        TB,
        Auto,
    }

    public static String formatFileSize(long size) {
        return formatFileSize(size, SizeUnit.Auto);
    }

    public static String formatFileSize(long size, SizeUnit unit) {
        if (size < 0) {
            return "未知大小";
        }

        final double KB = 1024;
        final double MB = KB * 1024;
        final double GB = MB * 1024;
        final double TB = GB * 1024;
        if (unit == SizeUnit.Auto) {
            if (size < KB) {
                unit = SizeUnit.Byte;
            } else if (size < MB) {
                unit = SizeUnit.KB;
            } else if (size < GB) {
                unit = SizeUnit.MB;
            } else if (size < TB) {
                unit = SizeUnit.GB;
            } else {
                unit = SizeUnit.TB;
            }
        }

        switch (unit) {
            case Byte:
                return size + "B";
            case KB:
                return String.format(Locale.US, "%.2fKB", size / KB);
            case MB:
                return String.format(Locale.US, "%.2fMB", size / MB);
            case GB:
                return String.format(Locale.US, "%.2fGB", size / GB);
            case TB:
                return String.format(Locale.US, "%.2fPB", size / TB);
            default:
                return size + "B";
        }
    }


    /**
     * 获取文件MD5的值
     *
     * @param file 文件
     * @return 文件的MD5
     */
    public static String getFileMD5(File file) {
        if (!file.isFile()) {
            return null;
        }
        MessageDigest digest = null;
        FileInputStream in = null;
        byte buffer[] = new byte[1024];
        int len;
        try {
            digest = MessageDigest.getInstance("MD5");
            in = new FileInputStream(file);
            while ((len = in.read(buffer, 0, 1024)) != -1) {
                digest.update(buffer, 0, len);
            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        BigInteger bigInt = new BigInteger(1, digest.digest());
        return bigInt.toString(16);
    }

    public static void deleteFolder(File folder) {
        if (folder.isDirectory()) {
            for (File file : folder.listFiles()) {
                if (file.isDirectory()) {
                    deleteFolder(file);
                } else {
                    file.delete();
                }
            }
        }
        folder.delete();
    }


    /**
     * 下载文件至本地
     *
     * @param remoteUrl 远程文件地址
     * @param localFile 本地保存路径
     * @throws IOException
     */

    public static void downloadFile(String remoteUrl, File localFile) throws IOException {
        int fileSize;
        URL url = new URL(remoteUrl);
        // 打开连接
        URLConnection con = url.openConnection();
        //获得文件的长度
        fileSize = con.getContentLength();
        // 输入流
        InputStream is = con.getInputStream();
        // 1K的数据缓冲
        byte[] bs = new byte[1024];
        // 读取到的数据长度
        int len;
        // 输出的文件流
        OutputStream os = new FileOutputStream(localFile);
        // 开始读取
        while ((len = is.read(bs)) != -1) {
            os.write(bs, 0, len);
        }
        // 完毕，关闭所有链接
        os.close();
        is.close();
    }

}