写MifareClassic卡用我们自己的Andr​​oid应用程序上 [英] Write on a MifareClassic card with our own android application

问题描述

我目前正在开发一个Android应用程序，这将写入Mifare卡上设有一个小型的文本。
我想申请，但code doest't工作方案。有人知道我有什么对Android清单写？
这里是我的code，如果有人可以帮助我，这将是很亲切。非常感谢你。

公共静态最后的标签CREATOR = NULL;

 公共无效ecrirenfc（标签标签）{    MifareClassic MFC = MifareClassic.get（标签）;    尝试{
        mfc.connect（）;
        布尔AUTH = FALSE;        AUTH = mfc.authenticateSectorWithKeyA（1，MifareClassic.KEY_DEFAULT）;        如果（AUTH）{
            字符串文本=你好，世界！
            字节[]值= text.getBytes（）;
            字节[] = toWrite新的字节[MifareClassic.BLOCK_SIZE]            的for（int i = 0; I＆LT; MifareClassic.BLOCK_SIZE;我++）{
                如果（ⅰ＆下; value.length）
                    toWrite [I] =值[I]
                其他
                    toWrite [I] = 0;
            }            mfc.writeBlock（1，toWrite）;
        }    }赶上（IOException异常五）{
    }
}公共无效的onClick（查看视图）{
    如果（view.getId（）== R.id.button1）{
        ecrirenfc（CREATOR）;
    }
}
 

解决方案

您需要使用

  sectorToBlock（INT sectorIndex）
 

的方法来确定该扇区的第一个块。然后使用

  getBlockCountInSector（INT sectorIndex）
 

要确定你能有多少块（-1）写入到该部门。

有关您的上述code，你在试图写0扇区，当你已经验证部门1。

I am currently trying to develop an android application which will write a smal text on a Mifare card. I tried to program an application but the code doest't work. Someone knows what do I have to write on the Android Manifest? Here is my code, if somebody could help me it would be very kind. Thank you very much

public static final Tag CREATOR = null;

public void ecrirenfc(Tag tag) {

    MifareClassic mfc = MifareClassic.get(tag);

    try {
        mfc.connect();
        boolean auth = false;

        auth = mfc.authenticateSectorWithKeyA(1, MifareClassic.KEY_DEFAULT);

        if (auth) {
            String text = "Hello, World!";
            byte[] value = text.getBytes();
            byte[] toWrite = new byte[MifareClassic.BLOCK_SIZE];

            for (int i = 0; i < MifareClassic.BLOCK_SIZE; i++) {
                if (i < value.length)
                    toWrite[i] = value[i];
                else
                    toWrite[i] = 0;
            }

            mfc.writeBlock(1, toWrite);
        }

    } catch (IOException e) {
    }
}

public void onClick(View view) {
    if (view.getId() == R.id.button1) {
        ecrirenfc(CREATOR);
    }
}

解决方案

You need to use the

sectorToBlock(int sectorIndex)

method to determine the first block of the sector. Then use

getBlockCountInSector(int sectorIndex)

to determine how many blocks (-1) you can write to in that sector.

For your above code, you are trying to write to sector 0 when you have authenticated sector 1.

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