RFID读写器函数中java声明中有很多Pointer类型的参数，对于此类参数的调用方法示例如下：

if(NFCReader.YW_SearchCardModeEx(ReaderID, NFCReader.SEARCHMODE_14443A,0)<0)return;

//按照参数的实际大小，声明一个与之对应的大小的Pointer类型 

Pointer pCardType = new Pointer(MemoryBlockFactory.createMemoryBlock(2));

if(NFCReader.YW_RequestCard(ReaderID, NFCReader.REQUESTMODE_ALL, pCardType)<0)return;

//CardType 作为short类型，从类型Pointer中取出的办法

CardType = pCardType.getAsShort(0);

Pointer pCardMem = new Pointer(MemoryBlockFactory.createMemoryBlock(1));

Pointer pLengthUID = new Pointer(MemoryBlockFactory.createMemoryBlock(1));

Pointer pUID = new Pointer(MemoryBlockFactory.createMemoryBlock(20));

               if(NFCReader.YW_AntiCollideAndSelect(ReaderID,Mode,pCardMem,pLengthUID,pUID)<0)return;

CardMem = pCardMem.getAsByte(0);

LengthUID = pLengthUID.getAsByte(0);

//UID数组从Pointer中取出的办法

UID=pUID.getMemory();

edtS50UID.setText(HexToStr(UID, LengthUID));