Android 技术总结(014)—— 获取与转转文件的大小(B,KB,MB,GB)
上一篇:http://www.zzzyk.com/kf/201208/149892.html[java
/**
* 取得文件大小
*
* @param f
* @return
* @throws Exception
*/
public long getFileSizes(File f) throws Exception {
long s = 0;
if (f.exists()) {
FileInputStream fis = null;
fis = new FileInputStream(f);
s = fis.available();
} else {
f.createNewFile();
}
return s;
}
/**
* 转换文件大小
*
* @param fileS
* @return
*/ www.zzzyk.com
public String FormetFileSize(long fileS) {
DecimalFormat df = new DecimalFormat("#.00");
String fileSizeString = "";
if (fileS < 1024) {
fileSizeString = df.format((double) fileS) + "B";
} else if (fileS < 1048576) {
fileSizeString = df.format((double) fileS / 1024) + "K";
} else if (fileS < 1073741824) {
fileSizeString = df.format((double) fileS / 1048576) + "M";
} else {
fileSizeString = df.format((double) fileS / 1073741824) + "G";
}
return fileSizeString;
}
补充:移动开发 , Android ,