Android编程获取sdcard卡信息的方法

public static SDCardInfo getSDCardInfo() {  String sDcString = android.os.Environment.getExternalStorageState();  if (sDcString.equals(android.os.Environment.MEDIA_MOUNTED)) {   File pathFile = android.os.Environment.getExternalStorageDirectory();   try {    android.os.StatFs statfs = new android.os.StatFs(pathFile.getPath());    // 获取SDCard上BLOCK总数    long nTotalBlocks = statfs.getBlockCount();    // 获取SDCard上每个block的SIZE    long nBlocSize = statfs.getBlockSize();    // 获取可供程序使用的Block的数量    long nAvailaBlock = statfs.getAvailableBlocks();    // 获取剩下的所有Block的数量(包括预留的一般程序无法使用的块)    long nFreeBlock = statfs.getFreeBlocks();    SDCardInfo info = new SDCardInfo();    // 计算SDCard 总容量大小MB    info.total = nTotalBlocks * nBlocSize;    // 计算 SDCard 剩余大小MB    info.free = nAvailaBlock * nBlocSize;    return info;   } catch (IllegalArgumentException e) {    Log.e(LOG_TAG, e.toString());   }  }  return null;}SDCardInfo sdCardInfo = Util.getSDCardInfo();// sd卡总容量sdCardInfo.total// sd卡剩余容量sdCardInfo.free