如何使用MifareClassic API“；“增量”；及；减量；在android中？

我的问题是，当我调用MifareClassic函数“increment”时，它将返回“increment success”，但当我检查值块时，它的值没有任何增量，我的代码中是否有任何错误使用

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

我的代码如下：

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

---

mifare

increment

和

decreation

函数对标记进行计算，但不会将结果写回持久内存

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

相反，结果将存储在标记上的临时寄存器中

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

要将结果写回标签，请使用

transfer

功能：

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }

请注意，您可以为增量和传输传递不同的块索引，以实现从块X进行加/减并将结果写入块Y的函数。

您能帮助我吗？提前谢谢

   try {
     mfc.increment(0x14,increvalue);
     metaInfo =  "Increment Success !";
     mfc.close();
   } catch (IOException e) {
     e.printStackTrace();
     metaInfo = "Increment Fail!";
   }