/* 判斷SD卡是否存在 返回true表示存在 */public boolean avaiableMedia() {  String status = Environment.getExternalStorageState();  if (status.equals(Environment.MEDIA_MOUNTED)) {   return true;  } else {   return false;  }}

/* 獲取SD卡可用空間 */public long getSDFreeSize() {  // 取得SD卡文件路徑  File path = Environment.getExternalStorageDirectory();  StatFs sf = new StatFs(path.getPath());  // 獲取單個(gè)數(shù)據(jù)塊的大小(Byte)  long blockSize = sf.getBlockSizeLong();  // 空閑的數(shù)據(jù)塊的數(shù)量  long freeBlocks = sf.getAvailableBlocksLong();  // 返回SD卡空閑大小  // return freeBlocks * blockSize; //單位Byte  // return (freeBlocks * blockSize)/1024; //單位KB  return (freeBlocks * blockSize) / 1024 / 1024; // 單位MB}

/* 獲取SD卡所有空間 */public long getSDAllSize() {  // 取得SD卡文件路徑  File path = Environment.getExternalStorageDirectory();  StatFs sf = new StatFs(path.getPath());  // 獲取單個(gè)數(shù)據(jù)塊的大小(Byte)  long blockSize = sf.getBlockSizeLong();  // 獲取所有數(shù)據(jù)塊數(shù)  long allBlocks = sf.getBlockCountLong();  // 返回SD卡大小  // return allBlocks * blockSize; //單位Byte  // return (allBlocks * blockSize)/1024; //單位KB  return (allBlocks * blockSize) / 1024 / 1024; // 單位MB}