Android 获取文件大小

以你之姓@ 2023-03-13 05:22 131阅读 0赞

android 获取文件夹、文件的大小 以B、KB、MB、GB 为单位

FileSizeUtil

![复制代码][aHR0cHM6Ly9jb21tb24uY25ibG9ncy5jb20vaW1hZ2VzL2NvcHljb2RlLmdpZg]

public class FileSizeUtil {
    public static final int SIZETYPE_B = 1;//获取文件大小单位为B的double值
    public static final int SIZETYPE_KB = 2;//获取文件大小单位为KB的double值
    public static final int SIZETYPE_MB = 3;//获取文件大小单位为MB的double值
    public static final int SIZETYPE_GB = 4;//获取文件大小单位为GB的double值
    /**
    * 获取文件指定文件的指定单位的大小
    * @param filePath 文件路径
    * @param sizeType 获取大小的类型1为B、2为KB、3为MB、4为GB
    * @return double值的大小
    */
    public static double getFileOrFilesSize(String filePath,int sizeType){
    File file=new File(filePath);
    long blockSize=0;
    try {
    if(file.isDirectory()){
    blockSize = getFileSizes(file);
    }else{
    blockSize = getFileSize(file);
    }
    } catch (Exception e) {
    e.printStackTrace();
    Log.e("获取文件大小","获取失败!");
    }
    return FormetFileSize(blockSize, sizeType);
    }
    /**
    * 调用此方法自动计算指定文件或指定文件夹的大小
    * @param filePath 文件路径
    * @return 计算好的带B、KB、MB、GB的字符串
    */
    public static String getAutoFileOrFilesSize(String filePath){
    File file=new File(filePath);
    long blockSize=0;
    try {
    if(file.isDirectory()){
    blockSize = getFileSizes(file);
    }else{
    blockSize = getFileSize(file);
    }
    } catch (Exception e) {
    e.printStackTrace();
    Log.e("获取文件大小","获取失败!");
    }
    return FormetFileSize(blockSize);
    }
    /**
    * 获取指定文件大小
    * @param f
    * @return
    * @throws Exception
    */
    private static long getFileSize(File file) throws Exception
    {
    long size = 0;
     if (file.exists()){
     FileInputStream fis = null;
     fis = new FileInputStream(file);
     size = fis.available();
     }
     else{
     file.createNewFile();
     Log.e("获取文件大小","文件不存在!");
     }
     return size;
    }
     
    /**
    * 获取指定文件夹
    * @param f
    * @return
    * @throws Exception
    */
    private static long getFileSizes(File f) throws Exception
    {
    long size = 0;
    File flist[] = f.listFiles();
    for (int i = 0; i < flist.length; i++){
    if (flist[i].isDirectory()){
    size = size + getFileSizes(flist[i]);
    }
    else{
    size =size + getFileSize(flist[i]);
    }
    }
    return size;
    }
    /**
     * 转换文件大小
     * @param fileS
     * @return
     */
    private static String FormetFileSize(long fileS)
    {
    DecimalFormat df = new DecimalFormat("#.00");
    String fileSizeString = "";
    String wrongSize="0B";
    if(fileS==0){
    return wrongSize;
    }
    if (fileS < 1024){
    fileSizeString = df.format((double) fileS) + "B";
     }
    else if (fileS < 1048576){
    fileSizeString = df.format((double) fileS / 1024) + "KB";
    }
    else if (fileS < 1073741824){
        fileSizeString = df.format((double) fileS / 1048576) + "MB";
      }
    else{
        fileSizeString = df.format((double) fileS / 1073741824) + "GB";
      }
    return fileSizeString;
    }
    /**
     * 转换文件大小,指定转换的类型
     * @param fileS 
     * @param sizeType 
     * @return
     */
    private static double FormetFileSize(long fileS,int sizeType)
    {
    DecimalFormat df = new DecimalFormat("#.00");
    double fileSizeLong = 0;
    switch (sizeType) {
    case SIZETYPE_B:
    fileSizeLong=Double.valueOf(df.format((double) fileS));
    break;
    case SIZETYPE_KB:
    fileSizeLong=Double.valueOf(df.format((double) fileS / 1024));
    break;
    case SIZETYPE_MB:
    fileSizeLong=Double.valueOf(df.format((double) fileS / 1048576));
    break;
    case SIZETYPE_GB:
    fileSizeLong=Double.valueOf(df.format((double) fileS / 1073741824));
    break;
    default:
    break;
    }
    return fileSizeLong;
    }

[aHR0cHM6Ly9jb21tb24uY25ibG9ncy5jb20vaW1hZ2VzL2NvcHljb2RlLmdpZg]: /images/20230312/92ab17ce17ba4b1fb8d12ef2c3878a81.png