Android - 获取SD卡的内存空间大小

 1        //获得SD卡空间的信息
 2         File path=Environment.getExternalStorageDirectory();
 3         StatFs statFs=new StatFs(path.getPath());
 4         long blocksize=statFs.getBlockSize();
 5         long totalblocks=statFs.getBlockCount();
 6         long availableblocks=statFs.getAvailableBlocks();
 7         
 8         //计算SD卡的空间大小
 9         long totalsize=blocksize*totalblocks;
10         long availablesize=availableblocks*blocksize;
11         
12         //转化为可以显示的字符串
13         String totalsize_str=Formatter.formatFileSize(this, totalsize);
14         String availablesize_strString=Formatter.formatFileSize(this, availablesize);