稽查盘volumn的容量

检查盘volumn的容量
通过StatFs可以获得Filesystem 的状态

String storage Directory =Environment.getExternalStorageDirectory().toString();StatFs stat = new StatFs(storageDirectory);//获得仍可用的大小long remaining = (long) stat.getAvailableBlocks()*        (long)stat.getBlockSize();