Java – NFC and NFC tools to create nDef applications

I tried to do what I would guess would be simple, but it turned out not to be I have an acr122 NFC reader and a bunch of Mifare classic and Mifare ultralight tags. All I want to do is read and write the MIME type and short text string of each card from the Java application This is what I have done so far:

>I can connect to my reader and listen to the tag > what type of tag can I detect on the reader > on the Mifare classic tag, I can cycle through all the data on the tag (after the mobile phone programming tag) and build an ascii string, but most of the data is "junk" data > I can determine whether there is an application directory on the tag

This is my code:

Main:

public static void main(String[] args){
        TerminalFactory factory = TerminalFactory.getDefault();
        List<CardTerminal> terminals;
        try{
            TerminalHandler handler = new TerminalHandler();
            terminals = factory.terminals().list();
            CardTerminal cardTerminal = terminals.get(0);
            AcsTerminal terminal = new AcsTerminal();
            terminal.setCardTerminal(cardTerminal);
            handler.addTerminal(terminal);
            NfcAdapter adapter = new NfcAdapter(handler.getAvailableTerminal(),TerminalMode.INITIATOR);
            adapter.registerTagListener(new CustomNDEFListener());
            adapter.startListening();
            system.in.read();
            adapter.stopListening();
        }
        catch(IOException e){
        }
        catch(CardException e){
            System.out.println("CardException: " + e.getMessage());
        }

}

CustomNDEFListener：

public class CustomNDEFListener extends AbstractCardTool
{
    @Override
    public void doWithReaderWriter(MfClassicReaderWriter readerWriter)
            throws IOException{
        NdefMessageDecoder decoder = NdefContext.getNdefMessageDecoder();
        MadKeyConfig config = MfConstants.NDEF_KEY_CONfig;
        if(readerWriter.hasApplicationDirectory()){
            System.out.println("Application Directory Found!");
            ApplicationDirectory directory = readerWriter.getApplicationDirectory();
        }
        else{
            System.out.println("No Application Directory Found,creating one.");
            readerWriter.createApplicationDirectory(config);

        }
    }
}

From here on, I seem to be frustrated with how to really create and interact with applications Once I can create an application and write a record object, I should be able to write the data I need using the textmimerecord type. I just don't know how to get there Any ideas?

:: appendix:: obviously there is no NFC tools tag, it may be Are there enough representatives with enough ability to create one and reintegrate it into my question?

:: second appendix:: in addition, if someone can point out the direction of the library I need, and the documents are good and will run in Windows environment, I am willing to communicate with NFC tools

Solution

Have you checked this library? It is well written and poorly documented Actually no more than Javadoc