SimpleSizeDate.java

    @SuppressLint("DefaultLocale")
    public static String humanReadableByteCount(long bytes, boolean si) {
        int unit = si ? 1000 : 1024;
        if (bytes < unit) return bytes + " B";
        int exp = (int) (Math.log(bytes) / Math.log(unit));
        String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp - 1) + (si ? "" : "i");
        return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
    }
    
    public String getReadableSize() {
        long size = this.length();
        if (size <= 0) return "0";
        final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
        int unitGroup = (int) (Math.log10(size) / Math.log10(1024));
        return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, unitGroup))
                + " " + units[unitGroup];
    }
    
    public String getLastModified() {
        SimpleDateFormat simpleDateFormat =
                new SimpleDateFormat("dd/MM/yyyy EEE HH:mm", Locale.getDefault());
        return simpleDateFormat.format(this.lastModified());
    }