Bring QR Code data to my fields

Question

I am reading a QR Code as code below:

// Botão para abrir câmera e usar o QR Code (Irá abrir a Store para baixar um app nativo)
    btnQR = (Button) findViewById(R.id.btnQR);
    btnQR.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent("com.google.zxing.client.android.SCAN");
            intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
            startActivityForResult(intent, 0);
        }

        public void onActivityResult(int requestCode, int resultCode, Intent intent) {
            if (requestCode == 0) {
                if (resultCode == RESULT_OK) {

                    String contents = intent.getStringExtra("SCAN_RESULT");
                    String format = intent.getStringExtra("SCAN_RESULT_FORMAT");

                    // Handle successful scan

                } else if (resultCode == RESULT_CANCELED) {
                    // Handle cancel
                    Log.i("App","Scan unsuccessful");
                }
            }
        }

        private final String TAG = MainActivity.class.getSimpleName();
        private CompoundBarcodeView barcodeView;

        private BarcodeCallback callback = new BarcodeCallback() {
            @Override
            public void barcodeResult(BarcodeResult result) {
                if (result.getText() != null) {
                    barcodeView.setStatusText(result.getText());
                }

                String barcode = "35151022986022000105590000400630036591770797|20151013131745|21.26|";
                String[] resp = barcode.split("\\|");

                String cnpj = resp[0].substring(6, 20); // são 14 dígitos, iniciado da posição 7
                String coo = resp[0].substring(30, 35); // supondo que tenham sempre 6 dígitos
                String data = resp[1].substring(0, 5); // 6 primeiros dígitos corresponde a data
                String total = resp[2];

                System.out.println(cnpj);
                System.out.println(coo);
                System.out.println(data);
                System.out.println(total);

                try {
                    Date date = new SimpleDateFormat("yyyyMMdd").parse(data);
                } catch (ParseException e) {
                    e.printStackTrace();
                }
                String dataFormatada = new SimpleDateFormat("dd/MM/yyyy").format(data);

            }

            @Override
            public void possibleResultPoints(List<ResultPoint> resultPoints) {
            }
        };
    });

I need that when reading the QR Code, go back to min ha application already filled fields.

Campos:

- CNPJ
- Data
- COO
- Total

Answer 1

You can use the Split to separate the string in an array using a delimiter, in the example you posted, its delimiter is "|", so do something like this:

String[] resp = result.getText().split("|");

Ai just go through this array and collect the information you need.

It seems to me that the first course is a nfe key, correct!?

So the CNPJ is at position 7 with 14 digits, to pick up with Substring use:

String CNPJ = resp[0].subsring(7, 14);

Answer 2

Complementing the @Celsomarigojr response, you can use the method split to facilitate the processing of data, however, there is a correction to be made: the method said will not function properly without the character | is escaped, because the split method waits as one of its parameters a regular expression, and pipe is a special ER character, as per this answer in Soen.

Then change:

String[] resp = result.getText().split("|");

for:

String[] resp = result.getText().split("\\|");

Making a test with the string informed by you in the comments, see the result:

String barcode = "35151022986022000105590000400630036591770797|20151013131745|21.26|";        
String[] resp = barcode.split("\\|");
String cnpj = resp[0].substring(6, 20); //são 14 digitos, iniciado da posicao 7
String coo = resp[0].substring(30, 35); // supondo que tenham sempre 6 digitos
String data = resp[1].substring(0, 5); // 6 primeiros digitos sao da data
String total = resp[2];

Behold here the working code.

On date you can use the class SimpleFormatDate to format the date and display it in a more user-friendly way.

Date date = new SimpleDateFormat("yyyyMMdd").parse(data);
String dataFormatada = new SimpleDateFormat("dd/MM/yyyy").format(date);