关于 查看文件的size

public static long getTotalSize(String device) {

StatFs sf = new StatFs (device);

//long totalblocks = sf.getBlockCountLong();

//long freeblocks = sf.getFreeBlocksLong();//为可用的，包括 系统保留的部分

long avablocks = sf.getAvailableBlocksLong();//可用的，不包括 系统保留的部分

long bsize = sf.getBlockSizeLong();

//long usedsize = totalblocks - freeblocks;

Log.e(TAG, "totalblocks = " + totalblocks);

Log.e(TAG, "totalblocksize = " + totalblocks*bsize/1024/1024);

Log.e(TAG, "freeblocks = " + freeblocks);

Log.e(TAG, "freeblocksize = " + freeblocks*bsize/1024/1024);

Log.e(TAG, "avablocks = " + avablocks);

Log.e(TAG, "avablocksize = " + avablocks*bsize/1024/1024);

Log.e(TAG, "usedsize = " + usedsize*bsize/1024/1024);

return 0;

}