Android NFC相关资料之MifareClassic卡（读写）

01

if

(NfcAdapter.ACTION_TECH_DISCOVERED.equals(action))

02

{

03

//3) Get an instance of the TAG from the NfcAdapter

04

TagtagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

05

//4) Get an instance of the Mifare classic card from this TAG

06

//intent

07

mfc= MifareClassic.get(tagFromIntent);

08

if

(mfc!=

null

)

09

{

10

Toast.makeText(

this

,

"检测到卡片,读卡中。。。"

,Toast.LENGTH_SHORT).show();

11

try

12

{

13

mfc.connect();

14

boolean

auth = 

false

;

15

auth= mfc.authenticateSectorWithKeyA(

15

,

"passwo"

.getBytes());

//验证密码

16

if

(auth)

17

{

18

card_number_edittext.setText(

new

String(mfc.readBlock(

60

)));

//读取M1卡的第60块即15扇区第0块

19

password_edittext.requestFocus();

20

}

21

}

catch

(Exception e)

22

{

23

if

(BuildConfig.DEBUG)

24

{

25

e.printStackTrace();

26

}

27

28

}

29

}

30

}

//End of method

01

try

02

{

03

mfc.connect();

04

boolean

auth = 

false

;

05

short

sectorAddress = 

1

;

06

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

07

if

(auth)

08

{

09

//the last block of the sector is used for KeyA and KeyB cannot be overwritted

10

mfc.writeBlock(

4

,

"1383838438000000"

.getBytes());

//必须为16字节不够自己补0

11

mfc.close();

12

Toast.makeText(MainActivity.

this

,

"写入成功"

,Toast.LENGTH_SHORT).show();

13

}

14

}

catch

(IOException e)

15

{

16

//TODO Auto-generated catch block

17

e.printStackTrace();

18

}

finally

19

{

20

try

21

{

22

mfc.close();

23

}

catch

(IOException e)

24

{

25

//TODO Auto-generated catch block

26

e.printStackTrace();

27

}

28

}