android 获得存储设备状态

1.获取存储器总大小，可用大小

File path= Environment.getExternalStorageDirectory();
StatFs fs = new StatFs(path.getPath());
long blockcount = fs.getBlockCountLong();
long availblockcount = fs.getAvailableBlocksLong();
long blocksize = fs.getBlockSizeLong();


2> 内部存储器

File internal= Environment.getDataDirectory();