android统计文件大小实例

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//added by liting measure file size

privatestatic long getFileSize(File file) throws Exception{

longsize = 0;

if(file.exists()){

FileInputStreamfis = null;

fis=new FileInputStream(file);

size= fis.available();

}

returnsize;

}

//addedby liting measure directory size

privatestatic long getFileSizes(File f) throws Exception{

longsize = 0;

Fileflist[] = f.listFiles(new FileFilter() { @Override

publicboolean accept(File file)

{

//TODO Auto-generated method stub

return!file.isHidden();

}

});

for(inti=0;i<flist.length;i++){

if(flist[i].isDirectory()){

size= size + getFileSizes(flist[i]);

}else{

size= size + getFileSize(flist[i]);

}

returnsize;

}

//added by liting measure every directory'ssize

privatestatic String FormetFileSize(long fileS){

DecimalFormatdf = new DecimalFormat("#.00");

StringfileSizeString = "";

StringwrongSize = "0B";

if(fileS==0){

returnwrongSize;

}

if(fileS<1024){

fileSizeString= df.format((double)fileS) + "B";

}elseif(fileS<1048576){

fileSizeString= df.format((double)fileS/1024) + "KB";

}elseif(fileS<1073741824){

fileSizeString= df.format((double)fileS/1048576) + "MB";

}else{

fileSizeString= df.format((double)fileS/1073741824) + "GB";

}

returnfileSizeString;

}

//addedby liting measure every directory's size according the sizeType

privatestatic double FormetFileSize(long fileS,int sizeType){

DecimalFormatdf = new DecimalFormat("#.00");

doublefileSizeLong = 0;

switch(sizeType){

caseSIZETYPE_B:

fileSizeLong= Double.valueOf(df.format((double)fileS));

break;

caseSIZETYPE_KB:

fileSizeLong= Double.valueOf(df.format((double)fileS/1024));

break;

caseSIZETYPE_MB:

fileSizeLong= Double.valueOf(df.format((double)fileS/1048576));

break;

caseSIZETYPE_GB:

fileSizeLong= Double.valueOf(df.format((double)fileS/1073741824));

break;

default:

break;

}

returnfileSizeLong;

}

try{//add by liting

if (file.isDirectory())

{

blockSize =getFileSizes(file);//add by liting

File[] listFiles=file.listFiles(newFileFilter() { @Override

publicboolean accept(File file)

{

//TODO Auto-generated method stub

return!file.isHidden();

}

});

intcount=(null==listFiles)?-1:listFiles.length; // avoid nullpointerexception

Log.d("5555","count="+count);

holder.fileicon.setImageBitmap(mIconFolder);// 鏂囦欢澶瑰浘鏍?

holder.fileinfo.setText(mSimpleDateFormat.format(date)+ // 鏂囦欢澶逛俊鎭?

" "+FormetFileSize(blockSize)); //modify by liting

returnconvertView;

//beginadd by liting

}else{

blockSize= getFileSize(file);

}

}catch(Exceptione){

e.printStackTrace();

}//endadd by liting

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