Develop Reference

the firebase reference is not being added

for some reason, the data is not being added to the firebase database. maybe its because i set the database in test mode? i have no idea. this was working before, however today it stopped working.
private EditText EditTextFullName, EditTextAge, EditTextEmail, EditTextPassword;
private TextView registerUser;
private FirebaseAuth mAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
mAuth = FirebaseAuth.getInstance();
Objects.requireNonNull(getSupportActionBar()).hide();
EditTextFullName = (EditText) findViewById(R.id.fullName);
EditTextAge = (EditText) findViewById(R.id.age);
EditTextEmail = (EditText) findViewById(R.id.email);
EditTextPassword = (EditText) findViewById(R.id.password);
registerUser= (Button) findViewById(R.id.registerUser);
registerUser.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.registerUser:
registerUser();
break;
}
}
private void registerUser() {
String email = EditTextEmail.getText().toString().trim();
String age = EditTextAge.getText().toString().trim();
String fullname = EditTextFullName.getText().toString().trim();
String password = EditTextPassword.getText().toString().trim();
if(password.length() < 6) {
EditTextPassword.setError("Min password length should be 6 characters");
EditTextPassword.requestFocus();
return;
}
mAuth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
User user = new User(fullname, age, email);
FirebaseDatabase.getInstance().getReference("Users")
.child((FirebaseAuth.getInstance().getCurrentUser()).getUid())
.setValue(user).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if(task.isSuccessful())
{
Toast.makeText(Register.this, "User has been registered", Toast.LENGTH_LONG).show();
startActivity(new Intent(Register.this,Login.class));
} else
{
Toast.makeText(Register.this, "Failed to register", Toast.LENGTH_LONG).show();
}
};
});
}
}
});
}
}

Well it turns out that I completely flopped when writing my code. Turns out in my User class with my constructers, i had my strings there twice causing the database to not know what to use.

How to redirect different users to different activities using android studio and a realtime firebase database

I am developing an app on android studio and need to redirect clients and personal trainers to two different activities based on their role. Personal Trainers need to be directed to PTNoticeboardActivity and clients to NoticeboardActivity. Any suggestion on how to do this, here is my login code:
public class MainActivity extends AppCompatActivity {
private FirebaseAuth firebaseAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseAuth = FirebaseAuth.getInstance();
}
public void loginUser(View View){
String email = ((EditText) findViewById(R.id.editText_Log_email)).getText().toString();
String password = ((EditText) findViewById(R.id.editText_Log_password)).getText().toString();
if(TextUtils.isEmpty(email)){
Toast.makeText(this, "Please enter email", Toast.LENGTH_LONG).show();
return;
}
if (TextUtils.isEmpty(password)){
Toast.makeText(this, "Please Enter Password", Toast.LENGTH_LONG).show();
return;
}
firebaseAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
Toast.makeText(MainActivity.this, "Login Successful", Toast.LENGTH_LONG).show();
// startActivity(new Intent(getApplicationContext(), NoticeBoardActivity.class));
// finish();
} else {
Toast.makeText(MainActivity.this, "Login Unsuccessful", Toast.LENGTH_LONG).show();
}
}
});
}
}
Here is my register activity code below:
public class RegisterActivity extends AppCompatActivity {
EditText txt_fullname, txt_email, txt_mobilenumber, txt_repassword,
txt_password;
Button btn_register;
RadioButton radioJobClient, radioJobPT;
DatabaseReference databaseReference;
FirebaseDatabase firebaseDatabase;
String job ="";
FirebaseAuth firebaseAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
txt_fullname = (EditText) findViewById(R.id.editText_fullname);
txt_email = (EditText) findViewById(R.id.editText_UserEmail);
txt_password = (EditText) findViewById(R.id.editText_Password);
txt_repassword = (EditText) findViewById(R.id.editText_rePassword);
txt_mobilenumber = (EditText) findViewById(R.id.mobilenumber);
btn_register = (Button) findViewById(R.id.button_reg);
radioJobClient = (RadioButton) findViewById(R.id.radio_Client);
radioJobPT = (RadioButton) findViewById(R.id.radio_PersonalTrainer);
databaseReference = FirebaseDatabase.getInstance().getReference("User");
// new code
firebaseAuth = FirebaseAuth.getInstance();
btn_register.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String fullname = txt_fullname.getText().toString();
final String email = txt_email.getText().toString();
final String mobilenumber = txt_mobilenumber.getText().toString();
final String password = txt_password.getText().toString();
final String rePassword = txt_repassword.getText().toString();
if (radioJobClient.isChecked()){
job = "Client";
}
if (radioJobPT.isChecked()){
job = "PT";
}
if (TextUtils.isEmpty(email)){
Toast.makeText(RegisterActivity.this, "Please enter Email", Toast.LENGTH_LONG).show();
}
if (TextUtils.isEmpty(fullname)){
Toast.makeText(RegisterActivity.this, "Please enter fullname", Toast.LENGTH_LONG).show();
}
if (TextUtils.isEmpty(password)){
Toast.makeText(RegisterActivity.this, "Please enter password", Toast.LENGTH_LONG).show();
}
firebaseAuth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener(RegisterActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
User user = new User(
fullname,
email,
mobilenumber,
password,
job
);
FirebaseDatabase.getInstance().getReference("User")
.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
.setValue(user).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
Toast.makeText(RegisterActivity.this, "Registration Complete", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(),MainActivity.class));
}
});
} else {
Toast.makeText(RegisterActivity.this, "Registration Unsuccessful", Toast.LENGTH_LONG).show();
}
// ...
}
});
}
});
}
public void goLogin (View view){
startActivity(new Intent(RegisterActivity.this, MainActivity.class));
}
}
Database structure:

This is the most efficient way to do it:
When your user has created an account, create a child node in the firebase database as role with value as per the user. [could be client or personal trainer]
Then when your activity starts, fetch the value from the database like this:
First of all add a LOGIN BUTTON toyour login activity. When user presses that then only the login thing will take place.
Here is your modified MainActivity.java:
public class MainActivity extends AppCompatActivity {
private FirebaseAuth firebaseAuth;
String userRole;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
firebaseAuth = FirebaseAuth.getInstance();
btnLogin = findViewById(R.id.btn_login_resource);
btnLogin.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String email = ((EditText) findViewById(R.id.editText_Log_email)).getText().toString();
String password = ((EditText) findViewById(R.id.editText_Log_password)).getText().toString();
if(TextUtils.isEmpty(email)){
Toast.makeText(this, "Please enter email", Toast.LENGTH_LONG).show();
return;
}
else if (TextUtils.isEmpty(password)){
Toast.makeText(this, "Please Enter Password", Toast.LENGTH_LONG).show();
return;
}
else{
firebaseAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(MainActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
Toast.makeText(MainActivity.this, "Login Successful", Toast.LENGTH_LONG).show();
jobRef = FirebaseDatabase.getInstance().getReference().child("User").child(pAuth.getCurrentUser().getUid()).child("job");
jobRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
try {
userRole = dataSnapshot.getValue().toString();
if(userRole.equals("Client")){
startActivity(new Intent(MainActivity.this, NoticeboardActivity.class);
}
else {
startActivity(new Intent(MainActivity.this, PTNoticeboardActivity.class);
}
}catch (Throwable e){
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_SHORT).show();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
Toast.makeText(getApplicationContext(), databaseError.toString(), Toast.LENGTH_SHORT).show();
}
});
} else {
Toast.makeText(MainActivity.this, "Login Unsuccessful", Toast.LENGTH_LONG).show();
}
}
});
}
}
}
});
.
Now one thing to care about is that anyone can reverse-engineer this code and illegally can get access to the data. So make sure the data in each activity is hosted in Firebase and you have set the appropriate firebase rules. If you want me to elaborate please let me know in the comments down below.

Firebase doesn't register new users

I have a problem, I can't register in my chat app. It shows me that "You can't register". I don't know where is the problem. I set read and write to true in my database but it still not working. I use the last versions of Firebase. I haven't problems with the internet and connected firebase to my project successfully.
This is my register activity
MaterialEditText username, email, password;
Button btn_register;
FirebaseAuth auth;
DatabaseReference reference;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Регистрация");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
username = findViewById(R.id.username);
email = findViewById(R.id.email);
password = findViewById(R.id.password);
btn_register = findViewById(R.id.btn_register);
auth = FirebaseAuth.getInstance();
btn_register.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String txt_username = username.getText().toString();
String txt_email = email.getText().toString();
String txt_password = password.getText().toString();
if (TextUtils.isEmpty(txt_username) || TextUtils.isEmpty(txt_email) || TextUtils.isEmpty(txt_password)) {
Toast.makeText(RegisterActivity.this, "Write more", Toast.LENGTH_SHORT).show();
} else if (txt_password.length() < 6 ){
Toast.makeText(RegisterActivity.this, "Password too short ", Toast.LENGTH_SHORT).show();
} else {
register(txt_username, txt_email, txt_password);
}
}
});
}
private void register(final String username, String email, String password){
auth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (task.isSuccessful()){
FirebaseUser firebaseUser= auth.getCurrentUser();
assert firebaseUser !=null;
String userid = firebaseUser.getUid();
reference = FirebaseDatabase.getInstance().getReference("Users").child(userid);
HashMap<String, String> HashMap = new HashMap<>();
HashMap.put("id", userid);
HashMap.put("username", username);
HashMap.put("imageURL", "default");
reference.setValue(HashMap).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if(task.isSuccessful()){
Intent intent = new Intent(RegisterActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
}
}
});
}else {
Toast.makeText(RegisterActivity.this, "You cant register", Toast.LENGTH_SHORT).show();
}
}
});
}
}

When initializing your FirebaseDatabase reference, the item node with the provided user id does not exist yet in your database thus the reference is null
String userid = firebaseUser.getUid();
reference = FirebaseDatabase.getInstance().getReference("Users").child(userid);
Instead, initialize the reference to the Users node
String userid = firebaseUser.getUid();
reference = FirebaseDatabase.getInstance().getReference("Users");
Then when saving the user's data you can save to their userId:
reference.child(userid).setValue(HashMap).addOnCompleteListener(new OnCompleteListener<Void>() {
...
});

in manifest file allow internet permission. if you continue this err create failure listener and print failure code
Log.w(TAG, "createUserWithEmail:failure", task.getException());
Toast.makeText(EmailPasswordActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();

register and login process in android through firestore

I am new in android, I am trying to develop a simple system in android and using the cloud firestore beta as the database. I have already done the registration part which is writing the data(email & password) in the database. but I do not know the process for the login as i want the system to read the data from the database and match with the emails and passwords from the database. Can anyone help me? Thanks in advance.
The registration activity is given below:
public class RegisterActivity extends AppCompatActivity {
private Button btnRegister;
private EditText edtxtEmail;
private EditText edtxtTpnumber;
private EditText edtxtDepartment;
private EditText edtxtPassword;
private EditText edtxtConfirmpassword;
private FirebaseFirestore rFireStore;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_register);
rFireStore = FirebaseFirestore.getInstance();
btnRegister = (Button) findViewById(R.id.btnregister);
edtxtEmail = (EditText) findViewById(R.id.edtxtemail);
edtxtTpnumber = (EditText) findViewById(R.id.edtxttpnumber);
edtxtDepartment = (EditText) findViewById(R.id.edtxtdepartment);
edtxtPassword = (EditText) findViewById(R.id.edtxtpassword);
edtxtConfirmpassword = (EditText) findViewById(R.id.edtxtconfirmPassword);
btnRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String Email = edtxtEmail.getText().toString();
String TPnumber = edtxtTpnumber.getText().toString();
String Department = edtxtDepartment.getText().toString();
String Password = edtxtPassword.getText().toString();
String ConfirmPassword = edtxtConfirmpassword.getText().toString();
Map<String, String> userMap = new HashMap<>();
userMap.put("Email Address", Email);
userMap.put("TP Number", TPnumber);
userMap.put("Department", Department);
userMap.put("Password", Password);
userMap.put("Confirm Pass", ConfirmPassword);
rFireStore.collection("Users").document("Students").set(userMap).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
Toast.makeText(RegisterActivity.this, "Data Saved!!", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(RegisterActivity.this, "Data Failed!!", Toast.LENGTH_SHORT).show();
}
});
/*rFireStore.collection("Users").add(userMap).addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
#Override
public void onSuccess(DocumentReference documentReference) {
Toast.makeText(RegisterActivity.this, "Data Saved!!", Toast.LENGTH_SHORT).show();
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(RegisterActivity.this, "Data Failed!!", Toast.LENGTH_SHORT).show();
}
});*/
}
});
}
}

For login you can use this:
for (QueryDocumentSnapshot documentSnapshot : task.getResult()) {
if (task.isSuccessful()) {
//task result = 1
}
}
if (task.getResult().size() == 0) {
//task result = 0
}

User login can'd identify user position

User register as student or tutor during registration which saved in firebase database but when login cannot identify the user position which saved in the firebase database so what should I do? Please anyone can give suggestion or advice me how to do this.
The database is save the uid from email authentication as the node under the root then rest details is the children of the uid.
The code like this
private FirebaseAuth auth;
private EditText un, pw;
private String getun, getpw, uid;
private Button bl;
private FirebaseDatabase db;
private DatabaseReference ref;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
auth = FirebaseAuth.getInstance();
db = FirebaseDatabase.getInstance();
ref = db.getReference();
uid = auth.getCurrentUser().getUid();
ref = db.getReference("users").child(uid);
un = (EditText) findViewById(R.id.Lun);
pw = (EditText) findViewById(R.id.Lpw);
bl = (Button) findViewById(R.id.Lbt);
final TextView rl = (TextView) findViewById(R.id.Lreg);
//login
bl.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getun = un.getText().toString().trim();
getpw = pw.getText().toString().trim();
loginaction(getun, getpw);
}
});
//open register page
rl.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent ri = new Intent(Login.this,Register.class);
Login.this.startActivity(ri);
}
});
}
private void loginaction(String a, String b){
auth.signInWithEmailAndPassword(a, b).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
Log.d("Login", "Login Success" + task.isSuccessful());
if (!task.isSuccessful()) {
Log.w("Login", "Login Failed", task.getException());
Toast.makeText(Login.this, "Login Failed. Please try again", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(Login.this, "Login Success", Toast.LENGTH_SHORT).show();
ref.orderByChild("position").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String ps = dataSnapshot.getValue().toString();
if(ps.equalsIgnoreCase("student")){
Intent i = new Intent(Login.this, StudentHomePage.class);
startActivity(i);
}else if (ps.equalsIgnoreCase("tutor")){
Intent i = new Intent(Login.this, TutorHomePage.class);
startActivity(i);
}else{
Toast.makeText(Login.this,
"Wrong input. Please check again the email and password.", Toast.LENGTH_SHORT).show();
return;
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
// ...
}
});
}

Create two child nodes from users. One for students and one for tutors.(Give both child values a value of true, otherwise firebase doesn't save the children.)
Have two registration buttons ..one for students and one for tutors. Registration for Tutor code.....
mRegistration.setOnClickListener(new
View.OnClickListener() {
#Override
public void onClick(View v) {
final String email = mEmail.getText().toString();
final String password = mPassword.getText().toString();
mAuth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(DriverLoginActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (!task.isSuccessful()){
Toast.makeText(TutorsLoginActivity.this, "Sign in error", Toast.LENGTH_SHORT).show();
}else{
String user_id= mAuth.getCurrentUser().getUid();
DatabaseReference current_user_db= FirebaseDatabase.getInstance().getReference().child("Users").child("Tutors").child(user_id);
current_user_db.setValue(true);
}
}
});
}
});
Do the same for the students. Just change the .child("Tutors") to .child("Students") This will give you UIDs for the two different groups. And you can do the same when logging in. I think this is a better way to proceed.