android - How to properly read nfc tag -

-

I am correctly setting up an NFC environment:

  • Technology Filter 

      & lt; Resource xmlns: xliff = "vase: oasis: name: tc: xliff: document: 1.2" & gt; & Lt; Technology list & gt; & Lt; Technology & gt; Android.nfc.tech.NfcA & lt; / Tech & gt; & Lt; Technology & gt; Android.nfc.tech.NdefFormatable & lt; / Tech & gt; & Lt; / Tech list & gt; & Lt; / Resources & gt;

  • Manifest 

      & lt; Use-permission Android: name = "android.permission.NFC" /> & lt; Accessibility Android: name = "android.hardware.nfc" /> & Lt; Activity Android: name = ".ui.ScanActivity" & gt; & Lt; Intent-Filter & gt; & Lt; Action Android: name = "android.nfc.action.TECH_DISCOVERED" /> & Lt; Category android: name = "android.intent.category.DEFAULT" /> & Lt; / Intent-Filter & gt; & Lt; Meta-Data Android: name = "android.nfc.action.TECH_DISCOVERED" Android: resource = "@xml / nfc_tech_filter" /> & Lt; / Activity & gt;  
  •  
     Code (activity, some time created after reading the NFC tag) 
     
      intent = getIntent (); If (intention! = Null) {string action = intent.action (); If (NfcAdapter.ACTION_TECH_DISCOVERED.equals (verb)) {parcelable [] rawMsgs = intent.getParcelableArrayExtra (NfcAdapter.EXTRA_NDEF_MESSAGES);               
     
     The same is true, Reads the same tag, shows the tag in which the tag is where I am wrong   
     
     
     There are various types of NFC tags (like Mifar Ultralight, Mifar Ultralight C, Mifar Classic, Felica .. .) Each tag has different memory size and reading process. For example: Miffer UltraLite has 64 bytes but the Mifera Classic 1 has 1 kilobyte memory. No additional authentication is required to read data from Mifare Ultralight, but Mifare Classic requirements require authentication. When you get a new intent, you can parse it to get the tag information: First you have to initialize the NFC Adapter and define the pending effect in the Crackback Callback:  
      NfcAdapter mAdapter; Pendingending mPendingIntent; MAdapter = NfcAdapter.getDefaultAdapter (this); If (mAdapter == null) {// nfc your device does not support return; } MPendingIntent = PendingIntent.getActivity (this, 0, new intent (this, getClass ()). AddFlags (Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);  
     
     Enable Foreground Dispatch to detect NFC intentions back in onResume (). 
     
      mAdapter.enableForegroundDispatch (this, mPendingIntent, null, null);  
     
     OnPause (in callback) you have to disable underground transmission: 
     
      if (mAdapter! = Null) {mAdapter.disableForegroundDispatch (this); }  
     
     OnNewIntent () call method will give you a new NFC intent. After receiving the intent, you will have to parse the intent to locate the card: 
     
      @Override Protected Zero to be newly created (intent to intent) {getTagInfo}} private zero getTagInfo Intent) {tag = intent.getParcelableExtra (NfcAdapter.EXTRA_TAG); }  
     
     Here is the complete project here to find the exact tag type that you have the tag

Comments

Post a Comment

Popular posts from this blog

mysql - How to enter php data into a html multiple select box -

-
I am working on a page that will create a team. I just want to create a selection box which will list all the users of all the users. After that, the user can select more than one friend (i.e. 5) and can send the request to these 5 people to join the team but I am having problems I did this: Select $ sql = "Select i. *, Join * Connect with M * m.id = i.clique_id where adder_id =: id"; $ Stmt = $ db- & gt; Query ($ sql, array ('id' = & gt; $ _SESSION ['id'])); While ($ record = $ stmt-> fetch ()) {$ surname = $ record ['surname']; } and this: & lt; Select multiple = "true" name = "category" well id = "category" name = "category" category = "" & gt; & Lt; Option value = "& lt ;? php echo $ surname ;? & gt;" & Gt; & Lt ;? Php ek $ nickname; ? & Gt; & Lt; / Options & gt; & Lt; / Select & gt; But only a friend's nickname...
Read more

java - Can't add JTree to JPanel of a JInternalFrame -

-
Image
There are two panels in my JInternalframe. I want to add TopPanel to Jtree to nominate another. But I can not add Jaitari to the top of the panel. Please help me in this piece of code: DefaultMutableTreeNode root = new DefaultMutableTreeNode ("deck"); DefaultMutableTreeNode Item Clubs = New DefaultMutableTreeNode ("Club"); AddAllCard (itemClubs); Root.add (itemClubs); DefaultMutableTreeNode item = New DefaultMutableTreeNode ("Diamonds"); AddAllCard (itemDiamonds); Root.add (itemDiamonds); DefaultMutableTreeNode Itemspads = New DefaultMutableTreeNode ("Spades"); AddAllCard (itemSpades); Root.add (itemSpades); DefaultMutableTreeNode item increases = new DefaultMutableTreeNode ("heart"); AddAllCard (itemHearts); Root.add (itemHearts); Default Trimodel Tree Model = New DefaultTreeModel (Route); Tree = new jetty (tree modal); ScrollPane = new JScrollPane (tree); // scrollPane.setViewportView (tree); . ScrollPane.getViewport () add (tr...
Read more

c++ - Cassandra datastax cpp driver - avoiding unnecessary copies -

-
I use the following method to create my insert statement for Cassandra (using datastax cpp driver) : ssStmt1 & lt; & Lt; "Insert some table (...) value (....)" string sStatement1 = ssStmt1.str (); Castestring cass1 = cass_string_init (sStatement1.c_str ()); CassStatement * pStmt1 = cass_statement_new (cass1, 0); I have also tried the following: CassString cass1 = cass_string_init ("Enter some table (id, date, c) value (? ,?,?); "); CassStatement * pStmt1 = cass_statement_new (cass1, 3); Cass_statement_bind_uuid (pStmt1, 0, uuidKey); Cass_statement_bind_int64 (PSTMT1, 1, timestamp); Cass_statement_bind_string (pStmt1, 2, sSomething); The first pattern works with mixed keys, the second is not. The key has a timestamp and a UUID. Timestamp is one of two errors in the field (based on the used bond statement). If bound in this way: cass_statement_bind_int64_by_name (pStmt1, "date", timestamp); I get the following error: Inva...
Read more