public long getSDTotalSize(){    /*获取存储卡路径*/    File sdcardDir= Environment.getExternalStorageDirectory();    /*StatFs 看文件系统空间使用情况*/    StatFs statFs=new StatFs(sdcardDir.getPath());    long blockSize= statFs.getBlockSizeLong();    long totalSize=statFs.getBlockCountLong();    return blockSize*totalSize;}    /**     * 获得sd卡剩余容量，即可以大小     * @return     */    public long getSdAvaliableSize()    {        File path=Environment.getExternalStorageDirectory();        StatFs statFs=new StatFs(path.getPath());        long blockSize=statFs.getBlockSizeLong();        long availableBlocks=statFs.getAvailableBlocksLong();        return blockSize*availableBlocks;    }    /**     * 获得机身内存大小     * @return     */    public long getRomTotalSize()    {        File path=Environment.getDataDirectory();        StatFs statFs=new StatFs(path.getPath());        long blockSize=statFs.getBlockSizeLong();        long tatalBlocks= statFs.getBlockCountLong();     return blockSize*tatalBlocks;    }    /**     * 获得机身可用内存     * @return     */    private long getRomAvailableSize()    {        File path=Environment.getDataDirectory();        StatFs statFs=new StatFs(path.getPath());        long blockSize=statFs.getBlockSizeLong();        long availableBlocks=statFs.getAvailableBlocksLong();        return blockSize*availableBlocks;    }