Does anyone know how to retrieve data on these qr codes and use them to update collections on my google firestore database. This would be very helpful. Below is the code I am using and because ML kit is in its beta etc I cannot find any tutorials on how to do this:
Here is the code below: What I am looking for is code to use said QR code and update fields in one of my collections on the database. If there is any pointers out there in how to do this it would be most welcomed. I have heard talk of arrays being used but as I am very new to programming in general I haven't covered this topic yet.
public class StudentAccount extends AppCompatActivity {
private static final int CHOOSE_IMAGE = 101;
public static final int CAMERA_REQUEST_CODE = 10;
public static final int PROFILE_PIC_REQUEST_CODE = 20;
private Button button, signout;
private FirebaseAuth mAuth;
TextView username;
ImageView imageView;
EditText editText;
Uri uriProfileImage;
ProgressBar progressBar;
String profileImageUrl;
ListView listView;
private List<String> userList = new ArrayList<>();
private final int BARCODE_RECO_REQ_CODE = 200;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_account);
mAuth = FirebaseAuth.getInstance();
signout = (Button) findViewById(R.id.SIGNOUT3);
username = (TextView) findViewById(R.id.welcomeText2);
//Check if user i already logged in or not
if (mAuth.getCurrentUser() == null){
finish();
startActivity(new Intent(getApplicationContext(),SignInActivity.class));
}
//Fetching display name of current user and setting to activity
FirebaseUser user = mAuth.getCurrentUser();
if (user != null){
username.setText("Welcome " +user.getEmail());
}
signout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mAuth.signOut();
finish();
startActivity(new Intent(getApplicationContext(), MainActivity.class));
}
});
imageView = findViewById(R.id.imageView);
progressBar = findViewById(R.id.progressbar);
mAuth = FirebaseAuth.getInstance();
button = findViewById(R.id.VIEW_ATTENDANCE);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
openViewMyAttendance();
}
});
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showImageChooser();
}
});
findViewById(R.id.buttonSave).setOnClickListener( new View.OnClickListener(){
@Override
public void onClick(View view) {
saveUserInformation();
}
private void saveUserInformation() {
FirebaseUser user = mAuth.getCurrentUser();
if (user != null && profileImageUrl != null){
UserProfileChangeRequest profile = new UserProfileChangeRequest.Builder()
.setPhotoUri(Uri.parse(profileImageUrl)).build();
user.updateProfile(profile).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful()) {
Toast.makeText(StudentAccount.this, "Profile Updated", Toast.LENGTH_SHORT).show();
}
}
});
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CHOOSE_IMAGE && resultCode == RESULT_OK && data != null && data.getData() !=null){
uriProfileImage = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uriProfileImage);
imageView.setImageBitmap(bitmap);
uploadImageToFirebaseStorage();
} catch (IOException e) {
e.printStackTrace();
}
}
if (requestCode == BARCODE_RECO_REQ_CODE){
if (resultCode == RESULT_OK){
Bitmap photo = (Bitmap)data.getExtras().get("data");
barcodeRecognition(photo);
}
}
}
private void barcodeRecognition(Bitmap photo) {
FirebaseVisionImage image = FirebaseVisionImage.fromBitmap(photo);
FirebaseVisionBarcodeDetector detector = FirebaseVision.getInstance()
.getVisionBarcodeDetector();
Task<List<FirebaseVisionBarcode>> result = detector.detectInImage(image)
.addOnSuccessListener(new OnSuccessListener<List<FirebaseVisionBarcode>>() {
@Override
public void onSuccess(List<FirebaseVisionBarcode> barcodes) {
for (FirebaseVisionBarcode barcode: barcodes) {
Rect bounds = barcode.getBoundingBox();
Point[] corners = barcode.getCornerPoints();
String rawValue = barcode.getRawValue();
int valueType = barcode.getValueType();
Toast.makeText(StudentAccount.this, rawValue, Toast.LENGTH_SHORT).show();
}
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(StudentAccount.this, "Something went wrong", Toast.LENGTH_SHORT).show();
}
});
}
private void uploadImageToFirebaseStorage() {
final StorageReference profileImageRef = FirebaseStorage.getInstance().getReference
("profilepics/"+System.currentTimeMillis() + ".jpg");
if (uriProfileImage != null){
progressBar.setVisibility(View.VISIBLE);
profileImageRef.putFile(uriProfileImage).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
progressBar.setVisibility(View.GONE);
profileImageUrl = taskSnapshot.getUploadSessionUri().toString();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
progressBar.setVisibility(View.GONE);
Toast.makeText(StudentAccount.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
}
private void loadUserInformation() {
if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
updateProfilePermissions();
} else {
String[] permissionRequested = {Manifest.permission.READ_EXTERNAL_STORAGE};
requestPermissions(permissionRequested, PROFILE_PIC_REQUEST_CODE);
}
}
private void updateProfilePermissions() {
FirebaseUser user = mAuth.getCurrentUser();
if (user.getPhotoUrl() != null) {
Glide.with(this).load(user.getPhotoUrl().toString()).into(imageView);
}
}
private void showImageChooser(){
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Profile Image"),CHOOSE_IMAGE);
}
@Override
protected void onPause(){
super.onPause();
}
public void barcodeReco(View v) {
if(checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){
callsCamera();
} else {
String[] permissionRequested = {Manifest.permission.CAMERA};
requestPermissions(permissionRequested, CAMERA_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == CAMERA_REQUEST_CODE){
if (grantResults[0] == PackageManager.PERMISSION_GRANTED){
callsCamera();
} else {
Toast.makeText(this, getString(R.string.unable_to_invoke_camera), Toast.LENGTH_LONG).show();
}
} else if (requestCode == PROFILE_PIC_REQUEST_CODE){
if (grantResults [0] == PackageManager.PERMISSION_GRANTED){
loadUserInformation();
} else {
Toast.makeText( this, getString(R.string.Unable_to_update_profile), Toast.LENGTH_LONG).show();
}
}
}
private void callsCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent,BARCODE_RECO_REQ_CODE);
}
public void openViewMyAttendance () {
Intent intent = new Intent(this, ViewMyAttendance.class);
startActivity(intent);
}
}
Here is a piece of code i have used to manually update fields in the database. I am struggling to change this code to use qr code to update the fields.
public void saveAttendance(View v) {
String sessionID = editTextSessionID.getText().toString();
String studentID = editTextStudentID.getText().toString();
Attendance attendance = new Attendance(sessionID, studentID);
attendanceRef2.add(attendance).addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
@Override
public void onSuccess(DocumentReference documentReference) {
Toast.makeText(InputManualAttendance.this, "Attendance Record Updated", Toast.LENGTH_SHORT).show();
}
});
}
I have made a seperate Attendance class with get and set methods and made reference to them via this code below, here is where i input to firestore:
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private CollectionReference attendanceRef2 = db.collection("Attendance");
