size大小转换KBMB工具类

Posted 2022-12-10 aikongmeng

android 文件大小转换kb,mb 等系统工具，不用自己写
Android系统方法：
package android.util;

DebugUtils.java

public static String sizeValueToString(long number, StringBuilder outBuilder) 
        if (outBuilder == null) 
            outBuilder = new StringBuilder(32);
        
        float result = number;
        String suffix = "";
        if (result > 900) 
            suffix = "KB";
            result = result / 1024;
        
        if (result > 900) 
            suffix = "MB";
            result = result / 1024;
        
        if (result > 900) 
            suffix = "GB";
            result = result / 1024;
        
        if (result > 900) 
            suffix = "TB";
            result = result / 1024;
        
        if (result > 900) 
            suffix = "PB";
            result = result / 1024;
        
        String value;
        if (result < 1) 
            value = String.format("%.2f", result);
         else if (result < 10) 
            value = String.format("%.1f", result);
         else if (result < 100) 
            value = String.format("%.0f", result);
         else 
            value = String.format("%.0f", result);
        
        outBuilder.append(value);
        outBuilder.append(suffix);
        return outBuilder.toString();