java - 如何从 QR/条形码将扫描数据插入 FireBase 实时数据库？

Question

这是我的代码，它可以正常扫描 Qr/Barcode，但我希望将扫描的数据插入基于火的数据库中。此应用程序与 fire-base 连接，并使用 ML kit 进行条码扫描。此应用程序还具有与基于火的身份验证和扫描仪应用程序连接的登录注册。但我不知道如何将扫描数据推送到 android studio 的基于火的实时数据库中。

public class MainActivity extends AppCompatActivity {

    View view;
    CameraView camera_view;
    boolean isDetected= false;
    Button btn_start_again;
    private static final String TAG = "MainActivity";

    FirebaseVisionBarcodeDetectorOptions options;
    FirebaseVisionBarcodeDetector detector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        FirebaseVisionBarcodeDetector detector = FirebaseVision.getInstance()
                .getVisionBarcodeDetector();

        Dexter.withActivity(this)
                .withPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.RECORD_AUDIO})
                .withListener(new MultiplePermissionsListener() {
                    @Override
                    public void onPermissionsChecked(MultiplePermissionsReport report) {
                        setupCamera();
                    }
                    @Override
                    public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {

                    }
                }).check();
    }
    public void logout(View view) {
        FirebaseAuth.getInstance().signOut();//logout
        startActivity(new Intent(getApplicationContext(),login.class));
        finish();
    }

    private  void setupCamera()
    {
        btn_start_again= (Button)findViewById(R.id.btn_again);
        btn_start_again.setEnabled(isDetected);
        btn_start_again.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                isDetected = !isDetected;
            }
        });

        camera_view = (CameraView)findViewById(R.id.cameraView);
        camera_view.setLifecycleOwner(this);
        camera_view.addFrameProcessor(new FrameProcessor() {
            @Override
            public void process(@NonNull Frame frame)
            {
                processImage(getVisionImageFromFrame(frame));

            }

    });

        options = new FirebaseVisionBarcodeDetectorOptions.Builder()
                .setBarcodeFormats(FirebaseVisionBarcode.FORMAT_QR_CODE)
                .build();
        detector = FirebaseVision.getInstance().getVisionBarcodeDetector(options);

    }
    private void processImage(FirebaseVisionImage image){
        if(!isDetected)
        {
            detector.detectInImage(image)
                    .addOnSuccessListener(new OnSuccessListener<List<FirebaseVisionBarcode>>() {
                        @Override
                        public void onSuccess(List<FirebaseVisionBarcode> firebaseVisionBarcodes) {
                            processResult(firebaseVisionBarcodes);

                        }
                    })
                    .addOnFailureListener(new OnFailureListener() {
                        @Override
                        public void onFailure(@NonNull Exception e) {
                            Toast.makeText(MainActivity.this, ""+e.getMessage(),Toast.LENGTH_SHORT).show();
                        }
                    });

        }
    }
    private void processResult(List<FirebaseVisionBarcode> firebaseVisionBarcodes){
        if (firebaseVisionBarcodes.size()>0)
        {
            isDetected = true;
            btn_start_again.setEnabled(isDetected);
            for(FirebaseVisionBarcode item: firebaseVisionBarcodes)
            {
                int value_type = item.getValueType();
                switch (value_type)
                {
                    case FirebaseVisionBarcode.TYPE_TEXT:
                    {
                        createDialog(item.getRawValue());
                    }
                    break;
                    case FirebaseVisionBarcode.TYPE_URL:
                    {
                        //start browser intent
                        Intent intent =  new Intent(Intent.ACTION_VIEW, Uri.parse(item.getRawValue()));
                        startActivity(intent);
                    }
                    break;
                    case FirebaseVisionBarcode.TYPE_CONTACT_INFO:
                    {
                        String info = new StringBuilder("Name: ")
                                .append(item.getContactInfo().getName().getFormattedName())
                                .append("\n")
                                .append("Address: ")
                                .append(item.getContactInfo().getAddresses().get(0).getAddressLines())
                                .append("\n")
                                .append("Email: ")
                                .append(item.getContactInfo().getEmails().get(0).getAddress())
                                .toString();
                        createDialog(info);

                    }
                    break;
                    default:
                        break;
                }
            }
        }

    }
    private void createDialog(String text)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(text)
                .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                    }
                });
        AlertDialog dialog = builder.create();
        dialog.show();

    }

    private FirebaseVisionImage getVisionImageFromFrame(Frame frame){

        byte[] data= frame.getData();
        FirebaseVisionImageMetadata metadata = new FirebaseVisionImageMetadata.Builder()
                .setFormat(FirebaseVisionImageMetadata.IMAGE_FORMAT_NV21)
                .setHeight(frame.getSize() .getHeight())
                .setWidth(frame.getSize() .getWidth())
                //.setRotation(frame.getRotation())
                .build();
        return FirebaseVisionImage.fromByteArray(data,metadata);
    }
}

标签： javaandroidfirebasefirebase-realtime-database