Android 判斷SD卡是否存在及容量

<!-- 在SDCard中創建與刪除文件權限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<!-- 往SDCard寫入數據權限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

            SD卡是否存在

private boolean ExistSDCard() {
  if (android.os.Environment.getExternalStorageState().equals(
    android.os.Environment.MEDIA_MOUNTED)) {
   return true;
  } else
   return false;
 }

           SD卡剩餘空間

public long getSDFreeSize(){
     //取得SD卡文件路徑
     File path = Environment.getExternalStorageDirectory();
     StatFs sf = new StatFs(path.getPath());
     //獲取單個數據塊的大小(Byte)
     long blockSize = sf.getBlockSize();
     //空閒的數據塊的數量
     long freeBlocks = sf.getAvailableBlocks();
     //返回SD卡空閒大小
     //return freeBlocks * blockSize;  //單位Byte
     //return (freeBlocks * blockSize)/1024;   //單位KB
     return (freeBlocks * blockSize)/1024 /1024; //單位MB
   }

           SD卡總容量

public long getSDAllSize(){
     //取得SD卡文件路徑
     File path = Environment.getExternalStorageDirectory();
     StatFs sf = new StatFs(path.getPath());
     //獲取單個數據塊的大小(Byte)
     long blockSize = sf.getBlockSize();
     //獲取所有數據塊數
     long allBlocks = sf.getBlockCount();
     //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
   }





轉載於：http://blog.csdn.net/linghu_java/article/details/8965240