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

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

javascript - data.match(var) not working it seems -

-
OK, I have this small block code, which is to scanned a number on the website, but for some reason There is a hip that it is not scanning at all. var regenges = / \ & lt; Span class = "currency-robux" data-to-"item-private-value-price" & gt; ([\ D,]) \ & LT; \ / Span \ & gt; /; Var ValueCiling = Data. Match (reggae); Value-song = number (value slicing location (",", "")); Is there anything wrong with that? This is related to the if statement if (value sling and lieutenant; = price watching) { < P> A function calls to move from there, but for some reason it does not seem to run at all. So I think the Regex is wrong but I'm not sure how. (There is a variable in PriceWinking , this is a snippet from the code.) On the website, I'm trying to remove it. & lt; Span class = "robux" data-plus = "item-privatesale-price" & gt; 115 & lt; / Span & gt; Keep in mind
Read more

javascript - How can I pause a jQuery .each() loop, while waiting for user input? -

-
Before I continue to get a jQuery .each loop to wait for user input There is a problem in repeatedly repeating This is my code (I have commented on what I would like to do): & lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Top & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "common_components.css" /> & Lt; Meta http-equiv = "content-type" content = "text / html; charset = UTF-8" /> & Lt; Link rel = "stylesheet" href = "slider.css" & gt; & Lt ;? Php include_once 'common_components.php'; $ Query = $ dbh- & gt; Queries ("SELECT movies_dir FROM settings"); $ Line = $ query- & gt; Obtain (PDO :: FETCH_ASSOC); Date_default_timezone_set ('UTC'); Echo "& lt; title & gt; movie scanner & lt; / title & gt;"; ? & Gt; & Lt; Script src = "jquery.min.js" & gt; &am
Read more