NFC标签和php

Question

我是NFC标签的新手，对它的工作原理很感兴趣。我已经买了一个NFC标签，并且能够向标签中写入studentid。现在我的问题是如何将学生号传递到php web服务，并在通过我的应用程序扫描他们的学生卡之前检查这个学生是否已经支付了他/她的餐费。

好心的人可以帮助我如何做这件事。下面是我所做的。

//reading the tag
private String readText(NdefRecord record) throws UnsupportedEncodingException {

        byte[] payload = record.getPayload();

        // Get the Text Encoding
        String textEncoding = ((payload[0] & 128) == 0) ? "UTF-8" : "UTF-16";

        // Get the Language Code
        int languageCodeLength = payload[0] & 0063;

        // Get the Text
        return new String(payload, languageCodeLength + 1, payload.length - languageCodeLength - 1, textEncoding);
    }

    @Override
    protected void onPostExecute(String result) {
        if (result != null) {
        //show the student id in a textedit
            mTextView.setText(result);

            //pass variable to the server and get contents. I want to pass the student id to the method
            getstudentinfo(result);
        }
    }

      void getstudentinfo(String studID) {

        //get connection to the server using http request
        httpclient=new DefaultHttpClient();

        httppost= new HttpPost("http://myip/getStudentBl.php?studID="+ studID);

        try{

        response = getThreadSafeClient().execute(httppost);
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        final String response = httpclient.execute(httppost, responseHandler);

        //checking the response and info the user
        runOnUiThread(new Runnable() {
            public void run() {

            dialog.dismiss();
            }
            });

        //if the user is found
        if(response.equalsIgnoreCase("Student Found")){
            runOnUiThread(new Runnable() {
            public void run() {
            //Toast.makeText(MainActivity.this,"Saved Successfull", Toast.LENGTH_SHORT).show();
                stdBalance.setText("Student Balance " + response);
            }
            });
            //show the dashboard screen
            startActivity(new Intent(MainActivity.this, MainActivity.class));
        }else if(response.equalsIgnoreCase("No Record")){
            //show error results
            showAlert();
        }
        //end try catch
        }catch(Exception e){
            dialog.dismiss();
            System.out.println("Exception : " + e.getMessage());
            }

    }

Answer 1

据我所知，至少对于android阅读器，如果标签包含URL，它会自动加载浏览器并转到URL (不会询问您是否要打开应用程序，也不会询问您是否要转到URL)。您应该能够将student_id作为查询字符串放在页面中使用。

Answer 2

这里有一个NDEF实现的例子：Github repo

在主活动中，您必须修改

@Override
    public void ndefDataRead(String ndefData) {
    demoTextView.setText(ndefData);
}

调用getstudentinfo(String studID)方法，它可能会起作用