Develop Reference

Can't get firebaseAuth.getCurrentUser() from a second activity (or fragments)

I need to get
FirebaseAuth.getInstance().getCurrentUser()
from a second activity "DetailActivity" but i've got a Null pointer :
Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference
I can access it from the "MainActivity" but not from my bottomnavigationview fragments nor from the second activity "DetailActivity"
here is my code :
Connexion activity
public class ConnexionActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBinding = ActivityConnexionBinding.inflate(getLayoutInflater());
setContentView(mBinding.getRoot());
mAuth = FirebaseAuth.getInstance();
setGoogleSignIn();
}
//////////////////////GOOGLE LOGIN
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// GOOGLE
if (requestCode == RC_SIGN_IN) {
Task<GoogleSignInAccount> mAccountTask = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
GoogleSignInAccount account = mAccountTask.getResult(ApiException.class);
FirebaseAuthWithGoogleAccount(account);
} catch (ApiException e) {
e.printStackTrace();
}
} else {
Log.d(TAG, "OnClick: ERROR ACTIVITY RESULT NOT OK");
}
// FACEBOOK
mCallbackManager.onActivityResult(requestCode, resultCode, data);
}
private void FirebaseAuthWithGoogleAccount(GoogleSignInAccount account) {
Log.d(TAG, "firebaseauthwithgoogleaccount: begin firebase auth with google account");
AuthCredential credential = GoogleAuthProvider.getCredential(account.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnSuccessListener(new OnSuccessListener<AuthResult>() {
#Override
public void onSuccess(AuthResult authResult) {
Log.d(TAG, "OnSuccess: Logged in");
// Get logged in user
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
// Get user info
String uid = firebaseUser.getUid();
String email = firebaseUser.getEmail();
Log.d(TAG, "OnSuccess: Email" + email);
Log.d(TAG, "OnSuccess: uid" + uid);
// Check if user is new or existing
if (Objects.requireNonNull(authResult.getAdditionalUserInfo()).isNewUser()) {
// User is new account created
Log.d(TAG, "OnSuccess: Account created...\n" + email);
Toast.makeText(ConnexionActivity.this, "Account created...\n" + email, Toast.LENGTH_SHORT).show();
} else {
// Existing user logged in
Log.d(TAG, "OnSuccess: Existing user... \n" + email);
Toast.makeText(ConnexionActivity.this, "Existing user...\n" + email, Toast.LENGTH_SHORT).show();
}
// Start MainActivity
startActivity(new Intent(ConnexionActivity.this, MainActivity.class));
finish();
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.d(TAG, "OnFailure: Loggin failed" + e.getMessage());
}
});
}
private void setGoogleSignIn() {
// Configure google sign in
GoogleSignInOptions mGoogleSignInOption = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.requestidtoken))
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this, mGoogleSignInOption);
// Init firebase auth
mAuth = FirebaseAuth.getInstance();
}
//////////////////////GOOGLE END
FirebaseAuth.AuthStateListener mAuthListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user != null) {
//Start main activity
startActivity(new Intent(ConnexionActivity.this, MainActivity.class));
Toast.makeText(ConnexionActivity.this,
"You successfully signed-in ", Toast.LENGTH_SHORT).show();
finish();
}
}
};
// #Override
// protected void onDestroy() {
//
// // FIREBASE LOGOUT
// FirebaseAuth.getInstance().signOut();
// // GOOGLE LOGOUT
// GoogleSignInOptions gso = new GoogleSignInOptions.
// Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).
// build();
//
// GoogleSignInClient googleSignInClient = GoogleSignIn.getClient(ConnexionActivity.this, gso);
// googleSignInClient.signOut();
// // FACBOOK LOGOUT
// LoginManager.getInstance().logOut();
// super.onDestroy();
// }
MainActivity :
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBinding = ActivityMainBinding.inflate(getLayoutInflater());
View view = mBinding.getRoot();
setContentView(view);
mAuth = FirebaseAuth.getInstance();
}
#Override
public void onStart() {
super.onStart();
// Check if user is signed in (non-null) and update UI accordingly.
FirebaseUser currentUser = mAuth.getCurrentUser();
if(currentUser == null){
reload();
}
}
// restart connexion activity if the user isn't connected
private void reload(){
startActivity(new Intent(this, ConnexionActivity.class));
finish();
}
private void setBottomNavigationView(){
mBinding.bottomNavigation.setOnNavigationItemSelectedListener(navListener);
getSupportFragmentManager().beginTransaction().replace(mBinding.fragmentContainer.getId(), new MapFragment()).commit();
}
private final BottomNavigationView.OnNavigationItemSelectedListener navListener = item -> {
Fragment selectedFragment = null;
int itemId = item.getItemId();
if (itemId == R.id.map_view) {
selectedFragment = new MapFragment();
} else if (itemId == R.id.list_view) {
selectedFragment = new ListViewFragment();
} else if (itemId == R.id.workmates) {
selectedFragment = new WorkmatesFragment();
}
if (selectedFragment != null) {
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, selectedFragment).commit();
}
return true;
};
The fragment adapter where i launch the DetailActivity :
#Override
public void onBindViewHolder(#NonNull RecyclerView.ViewHolder holder, int position) {
final Result restaurant = mRestaurants.get(position);
((ListViewViewHolder) holder).itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Context context = view.getContext();
Intent intent = new Intent(context, DetailActivity.class);
intent.putExtra("idrestaurant", restaurant.getPlaceId());
context.startActivity(intent);
}
});
}
}
DetailActivty :
public class DetailActivity extends AppCompatActivity {
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mBinding = ActivityDetailBinding.inflate(getLayoutInflater());
View view = mBinding.getRoot();
setContentView(view);
}
private void setClickChosenRestaurantButton(){
mBinding.fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (FirebaseAuth.getInstance().getCurrentUser() != null) {
Map<String, Object> chosenRestaurant = new HashMap<>();
chosenRestaurant.put("restaurantChosen", getRestaurantId());
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DocumentReference docRef = UserCallData.getAllUsers().getFirestore().collection("users").document(firebaseUser.getUid());
docRef.set(chosenRestaurant, SetOptions.merge()).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
Log.d("123", "DocumentSnapshot successfully written!");
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Log.d("123", "Error writing document", e);
}
});
}
else {
Log.d("123", "pb with firebaseauth!");
}
}
});
}
}
D/123: pb with firebaseauth!
To be honest i do not understand in detail the behavior of the Firebase auth system that's why i'm stuck here.
Any idea?

I found out why it doesn't work :
#Override
protected void onDestroy() {
// FIREBASE LOGOUT
FirebaseAuth.getInstance().signOut();
// GOOGLE LOGOUT
GoogleSignInOptions gso = new GoogleSignInOptions.
Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).
build();
GoogleSignInClient googleSignInClient = GoogleSignIn.getClient(ConnexionActivity.this, gso);
googleSignInClient.signOut();
// FACBOOK LOGOUT
LoginManager.getInstance().logOut();
super.onDestroy();
}
In my ConnectionActivity
This disconnected my FirebaseUser when i destroyed ConnexionActivity after each connexion of the user.
I switch it to my MainActivity which isn't destroyed until the app crash or the user forces it to close.

How to create phone auth credential like Uber?

I want to create Phone Auth Credential like Uber, I mean when user use the app for the first time he has to complete his registration information after phone authentication then he will be able to move to DriverHome Activity, but next time he uses the authentication he will redirect to the DriverHome Activity automatically.
I've used Phone Auth Credential code and it works fine but I need to add the part is responsible for checking if the user registered before or not.
public class VerifyPhoneActivity extends AppCompatActivity {
private String verificationId;
private FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
DatabaseReference users;
ProgressBar progressBar;
TextInputEditText editText;
AppCompatButton buttonSignIn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_verification_code);
mAuth = FirebaseAuth.getInstance();
progressBar = findViewById(R.id.progressbar);
editText = findViewById(R.id.editTextCode);
buttonSignIn = findViewById(R.id.buttonSignIn);
String phoneNumber = getIntent().getStringExtra("phoneNumber");
sendVerificationCode(phoneNumber);
// save phone number
SharedPreferences prefs = getApplicationContext().getSharedPreferences("USER_PREF",
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString("phoneNumber", phoneNumber);
editor.apply();
buttonSignIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String code = editText.getText().toString().trim();
if (code.isEmpty() || code.length() < 6) {
editText.setError("Enter code...");
editText.requestFocus();
return;
}
verifyCode(code);
}
});
}
private void verifyCode(String code) {
PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationId, code);
signInWithCredential(credential);
}
private void signInWithCredential(PhoneAuthCredential credential) {
mAuth.signInWithCredential(credential)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Intent intent = new Intent(VerifyPhoneActivity.this, DriverHomeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}else {
Toast.makeText(VerifyPhoneActivity.this, task.getException().getMessage(), Toast.LENGTH_LONG).show();
progressBar.setVisibility(View.GONE);
}
}
});
}
private void sendVerificationCode(String number) {
progressBar.setVisibility(View.VISIBLE);
PhoneAuthProvider.getInstance().verifyPhoneNumber(
number,
60,
TimeUnit.SECONDS,
TaskExecutors.MAIN_THREAD,
mCallBack
);
progressBar.setVisibility(View.GONE);
}
private PhoneAuthProvider.OnVerificationStateChangedCallbacks
mCallBack = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
#Override
public void onCodeSent(String s, PhoneAuthProvider.ForceResendingToken forceResendingToken) {
super.onCodeSent(s, forceResendingToken);
verificationId = s;
}
#Override
public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
String code = phoneAuthCredential.getSmsCode();
if (code != null) {
editText.setText(code);
verifyCode(code);
}
}
#Override
public void onVerificationFailed(FirebaseException e) {
Toast.makeText(VerifyPhoneActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
progressBar.setVisibility(View.GONE);
}
};
}

before onCreateView
check if sharepreference has phone number if it has then using startActivity(new Intent(this, DriverHomeActivity.class); to go directly to driverhome activity
if sharepreference has no phone number then
Save phone number in sharepreference if onComplete function of signInWithCredential return successful using isSucessful
public class VerifyPhoneActivity extends AppCompatActivity {
private String verificationId;
private FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
DatabaseReference users;
ProgressBar progressBar;
TextInputEditText editText;
AppCompatButton buttonSignIn;
SharedPreferences prefs ;
SharedPreferences.Editor editor;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
prefs = getApplicationContext().getSharedPreferences("USER_PREF",
Context.MODE_PRIVATE);
editor = prefs.edit();
//add this line
if(prefs.getString("phoneNumber", null) != null)
startActivity(new Intent(this, DriverHomeActivity.class));
setContentView(R.layout.activity_verification_code);
mAuth = FirebaseAuth.getInstance();
progressBar = findViewById(R.id.progressbar);
editText = findViewById(R.id.editTextCode);
buttonSignIn = findViewById(R.id.buttonSignIn);
String phoneNumber = getIntent().getStringExtra("phoneNumber");
sendVerificationCode(phoneNumber);
buttonSignIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String code = editText.getText().toString().trim();
if (code.isEmpty() || code.length() < 6) {
editText.setError("Enter code...");
editText.requestFocus();
return;
}
verifyCode(code);
}
});
}
private void verifyCode(String code) {
PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationId, code);
signInWithCredential(credential);
}
private void signInWithCredential(PhoneAuthCredential credential) {
mAuth.signInWithCredential(credential)
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if (task.isSuccessful()){
//insert data if task is successful
editor.putString("phoneNumber", phoneNumber);
editor.apply();
Intent intent = new Intent(VerifyPhoneActivity.this, DriverHomeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}else {
Toast.makeText(VerifyPhoneActivity.this, task.getException().getMessage(), Toast.LENGTH_LONG).show();
progressBar.setVisibility(View.GONE);
}
}
});
}
private void sendVerificationCode(String number) {
progressBar.setVisibility(View.VISIBLE);
PhoneAuthProvider.getInstance().verifyPhoneNumber(
number,
60,
TimeUnit.SECONDS,
TaskExecutors.MAIN_THREAD,
mCallBack
);
progressBar.setVisibility(View.GONE);
}
private PhoneAuthProvider.OnVerificationStateChangedCallbacks
mCallBack = new PhoneAuthProvider.OnVerificationStateChangedCallbacks() {
#Override
public void onCodeSent(String s, PhoneAuthProvider.ForceResendingToken forceResendingToken) {
super.onCodeSent(s, forceResendingToken);
verificationId = s;
}
#Override
public void onVerificationCompleted(PhoneAuthCredential phoneAuthCredential) {
String code = phoneAuthCredential.getSmsCode();
if (code != null) {
editText.setText(code);
verifyCode(code);
}
}
#Override
public void onVerificationFailed(FirebaseException e) {
Toast.makeText(VerifyPhoneActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
progressBar.setVisibility(View.GONE);
}
};

The authentification firebase remember me after logout

I enter my main activity, inside the MainActivity I have registration, after the registartion accure I want to log out from firebase so that he doesn't remember me.
Because when I retured to the MainActivity after the signout he still remembers the previous user when I register as a new user. This occurs only after logging and logout immediately. Btw, if I run the app its working fine. The problem is only when I signout and then going to RegistrationActivity to register another user.
Here is the MainActivity code:
public class MainActivity extends AppCompatActivity {
private SignInButton signIn;
private int RC_SIGN_IN=1;
private GoogleSignInClient mGoogleSignInClient;
private String TAG = "MainActivity";
private FirebaseAuth mAuth;
private Button registration;
private EditText email;
private EditText password;
private Button login;
private BottomNavigationView bottomNavigationItemView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
signIn = (SignInButton)findViewById(R.id.sign_in_button);
mAuth = FirebaseAuth.getInstance();
registration = (Button) findViewById(R.id.registrate);
email = (EditText)findViewById(R.id.email);
password = (EditText)findViewById(R.id.password);
login = (Button)findViewById(R.id.login);
bottomNavigationItemView = (BottomNavigationView)findViewById(R.id.navB) ;
bottomNavigationItemView.getMenu().getItem(0).setChecked(true);
bottomNavigationItemView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.register_menu: {
Intent intent = new Intent(MainActivity.this, RegistrationActivity.class);
startActivity(intent);
break;
}
}
return true;
}
});
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
signIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
signIn();
}
});
registration.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, RegistrationActivity.class);
startActivity(intent);
}
});
login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String email_text = email.getText().toString().trim();
String password_text = password.getText().toString().trim();
if(TextUtils.isEmpty(email_text) || TextUtils.isEmpty(password_text))
{
Toast.makeText(MainActivity.this, "One or more fields are empty", Toast.LENGTH_LONG).show();
}
else
{
mAuth.signInWithEmailAndPassword(email_text, password_text).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(!task.isSuccessful())
{
Toast.makeText(MainActivity.this, "Sign in problem", Toast.LENGTH_LONG).show();
}
else
{
Intent intent = new Intent(MainActivity.this, AccountActivity.class);
startActivity(intent);
}
}
});
}
}
});
}
private void signIn() { /*Sign in to the app with Google Account*/
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent, RC_SIGN_IN);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try{
GoogleSignInAccount account = task.getResult(ApiException.class);
firebaseAuthWithGoogle(account);
}
catch(ApiException e){
Log.w(TAG, "Google Sin in Failed");
}
}
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct)
{
Log.d(TAG, "firebaseAuthWithGoogle:" + acct.getId());
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>()
{
#Override
public void onComplete(#NonNull Task<AuthResult> task)
{
if(task.isSuccessful())
{
Log.d(TAG, "signInWithCredential: success");
FirebaseUser user = mAuth.getCurrentUser();
updateUI(user);
}
else
{
Log.w(TAG, "signInWithCredential: failure", task.getException()); /*In case of unsuccessful login*/
Toast.makeText(MainActivity.this, "You are not able to log in to Google", Toast.LENGTH_LONG).show();
//updateUI(null);
}
}
});
}
private void updateUI(FirebaseUser user) /*In case of successful registration*/
{
GoogleSignInAccount acct = GoogleSignIn.getLastSignedInAccount(getApplicationContext());
if (acct != null) {
String personName = acct.getDisplayName();
String personGivenName = acct.getGivenName();
String personFamilyName = acct.getFamilyName();
String personEmail = acct.getEmail();
String personId = acct.getId();
Uri personPhoto = acct.getPhotoUrl();
Toast.makeText(this, "Name of User : " + personName + "UserId is : " + personId, Toast.LENGTH_LONG);
Intent intent = new Intent(this, AccountActivity.class);
intent.putExtra("personPhoto", personPhoto.toString());
startActivity(intent);
}
}
Here is the AccountActivity code:
public class AccountActivity extends AppCompatActivity {
private GoogleSignInClient mGoogleSignInClient;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthStateListener;
private CardView signOut;
private CardView ratingTable;
private CardView settings;
private CardView map;
private CardView favoritePlaces;
DatabaseReference databaseReference;
FirebaseDatabase database;
List<User> users;
CollapsingToolbarLayout collapsingToolbarLayout;
String photoString="No photo";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_account);
mAuth = FirebaseAuth.getInstance();
signOut = (CardView) findViewById(R.id.logout);
ratingTable = (CardView) findViewById(R.id.rating);
settings = (CardView)findViewById(R.id.settings);
map = (CardView) findViewById(R.id.map);
favoritePlaces = (CardView)findViewById(R.id.favorite);
database = FirebaseDatabase.getInstance();
databaseReference = database.getReference();
users = new ArrayList<User>();
collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collaps);
if(mAuth.getCurrentUser().getDisplayName()!=null)
{
Intent i = getIntent();
photoString = i.getStringExtra("personPhoto");
}
databaseReference.child("user").addValueEventListener(new ValueEventListener() { /*A new user is registered in the database*/
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
Iterable<DataSnapshot> children = dataSnapshot.getChildren();
for (DataSnapshot child : children) {
User user = child.getValue(User.class);
users.add(user);
}
if (!findUser()) /*If the user is not found, this is a new user and must be registered*/
addUser();
showName(); /*A user-specific message*/
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
signOut.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(mAuth.getCurrentUser().getDisplayName()!=null)
{
mGoogleSignInClient.signOut();
//Intent intent = new Intent(AccountActivity.this, MainActivity.class);
// startActivity(intent);
Intent i = getBaseContext().getPackageManager().getLaunchIntentForPackage(getBaseContext().getPackageName());
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
else
{
mAuth.signOut();
Intent i = getBaseContext().getPackageManager().getLaunchIntentForPackage(getBaseContext().getPackageName());
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
}
});
settings.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(AccountActivity.this, SettingsActivity.class);
startActivity(intent);
}
});
map.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(AccountActivity.this, MapsActivity.class);
startActivity(intent);
}
});
favoritePlaces.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(AccountActivity.this, favoritePlacesActivity.class);
startActivity(intent);
}
});
ratingTable.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(AccountActivity.this, RatingTableActivity.class);
startActivity(intent);
}
});
}
private void showName() /*A user-specific message*/
{
String name = "";
String userId = mAuth.getUid();
for (User tmpUser : users) {
if (userId.equals(tmpUser.getUserId()))
{
name = tmpUser.getUserName();
break;
}
}
collapsingToolbarLayout.setTitle("Hi " + name);
}
private boolean findUser() /*Check if a logged-on user is already registered in the database*/
{
FirebaseUser user = mAuth.getCurrentUser();
String userId = mAuth.getUid();
for (User tmpUser : users) {
if (userId.equals(tmpUser.getUserId())) {
return true;
}
}
return false;
}
private void addUser() /*In case of registration from Google Account*/
{
String userId = mAuth.getUid();
if(mAuth.getCurrentUser().getDisplayName()!=null) /*In case of registration not from Google Account*/
{
databaseReference = FirebaseDatabase.getInstance().getReference("user");
FirebaseUser user = mAuth.getCurrentUser();
String userName = user.getDisplayName();
User newUser = User.getInstance(userId, userName, photoString);
databaseReference.child(userId).setValue(newUser);
}
else /*If the user is not registered the function registers it in the database*/
{
databaseReference = FirebaseDatabase.getInstance().getReference("user");
Intent i = getIntent();
String firstName = i.getStringExtra("firstName");
String lastName = i.getStringExtra("lastName");
User newUser = User.getInstance(userId, firstName + " " + lastName, photoString);
databaseReference.child(userId).setValue(newUser);
}
}
RegistrationActivity code:
public class RegistrationActivity extends AppCompatActivity {
EditText email_text;
EditText pass1;
EditText pass2;
EditText first;
EditText last;
Button registrate;
FirebaseAuth mAuth;
private ProgressDialog progressDialog;
private BottomNavigationView bottomNavigationItemView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_registration);
mAuth = FirebaseAuth.getInstance();
progressDialog = new ProgressDialog(this);
email_text = (EditText)findViewById(R.id.email);
pass1 = (EditText)findViewById(R.id.password1);
pass2 = (EditText)findViewById(R.id.password2);
first = (EditText)findViewById(R.id.first_name);
last = (EditText)findViewById(R.id.last_name);
registrate = (Button)findViewById(R.id.registrate);
bottomNavigationItemView = (BottomNavigationView)findViewById(R.id.navB) ;
bottomNavigationItemView.getMenu().getItem(1).setChecked(true);
bottomNavigationItemView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.Signin_menu: {
Intent intent = new Intent(RegistrationActivity.this, MainActivity.class);
startActivity(intent);
break;
}
}
return true;
}
});
registrate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String email = email_text.getText().toString().trim();
String password1 = pass1.getText().toString().trim();
String password2 = pass2.getText().toString().trim();
final String first_name = first.getText().toString().trim();
final String last_name = last.getText().toString().trim();
boolean correctFlag=true;
/*All tests for input integrity*/
if(!password1.equals(password2))
{
Toast.makeText(RegistrationActivity.this, "The password does not match", Toast.LENGTH_LONG).show();
correctFlag=false;
}
if(password1.equals("") && password2.equals(""))
{
Toast.makeText(RegistrationActivity.this, "No password entered", Toast.LENGTH_LONG).show();
correctFlag=false;
}
if(email.equals("") || first_name.equals("") || last_name.equals(""))
{
Toast.makeText(RegistrationActivity.this, "One or more of the parameters are incorrect", Toast.LENGTH_LONG).show();
correctFlag=false;
}
if(correctFlag) /*There is no problem filling the fields*/
{
progressDialog.setMessage("Registrating user...");
progressDialog.show();
mAuth.createUserWithEmailAndPassword(email, password1).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful())
{
Toast.makeText(RegistrationActivity.this, "Registered Succesfully", Toast.LENGTH_SHORT).show();
progressDialog.cancel();
Intent intent = new Intent(RegistrationActivity.this, AccountActivity.class);
intent.putExtra("firstName", first_name);
intent.putExtra("lastName", last_name);
startActivity(intent);
}
else
{
Toast.makeText(RegistrationActivity.this, "could not register. please try again", Toast.LENGTH_SHORT).show();
progressDialog.cancel();
}
}
});
}
}
});
}

You need to log out of GoogleSignInClient :
public void signOut() {
signOutBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestEmail()
.build();
GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(getContext(), gso);
mGoogleSignInClient.signOut();
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(getContext(), LoginActivity.class));
}
});
}

Firebase Auth not starting Activity on button click but works when close and reopen the app

The Firebase Auth is not starting on HomeActivitiy on button click.
It only works where reopen the application.
public class Auth1Activity extends AppCompatActivity {
String string_1;
String string_2;
private static final Boolean CHECK_EMAIL_VERIFIED = false;
private static final String TAG = "LoginActivity";
private FirebaseAuth firebaseAuth;
private FirebaseAuth.AuthStateListener authStateListener;
private FirebaseUser firebaseUser;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_auth_1);
firebaseAuth = FirebaseAuth.getInstance();
authStateListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
}
};
firebaseUser = firebaseAuth.getCurrentUser();
if (firebaseUser != null) {
Intent intent = new Intent(Auth1Activity.this, HomeActivity.class);
startActivity(intent);
finish();
}
final EditText auth_layout_1_edit_text_1 = findViewById(R.id.auth_layout_1_edit_text_1);
final EditText auth_layout_1_edit_text_2 = findViewById(R.id.auth_layout_1_edit_text_2);
Button auth_layout_1_button = findViewById(R.id.auth_layout_1_button);
auth_layout_1_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
string_1 = auth_layout_1_edit_text_1.getText().toString();
string_2 = auth_layout_1_edit_text_2.getText().toString();
if (string_1.matches("") && string_2.matches("")) {
auth_layout_1_edit_text_1.setError("Enter Email Address");
auth_layout_1_edit_text_2.setError("Enter Password");
} else if (!string_1.matches("") && !string_2.matches("")) {
firebaseAuth.signInWithEmailAndPassword(string_1, string_2)
.addOnCompleteListener(Auth1Activity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
try {
if (firebaseUser.isEmailVerified()) {
Intent intent = new Intent(Auth1Activity.this, HomeActivity.class);
startActivity(intent);
finish();
} else if (!firebaseUser.isEmailVerified()) {
Toast.makeText(Auth1Activity.this, "Sign Up Error Please Try Again.", Toast.LENGTH_SHORT).show();
}
} catch (NullPointerException ignored) {
}
}
});
}
}
});
}
#Override
public void onStart() {
super.onStart();
firebaseAuth.addAuthStateListener(authStateListener);
}
#Override
public void onStop() {
super.onStop();
if (authStateListener != null) {
firebaseAuth.removeAuthStateListener(authStateListener);
}
}
}
What could be going wrong?

Try this way
authStateListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
firebaseUser = firebaseAuth.getCurrentUser();
if (firebaseUser != null) {
Intent intent = new Intent(Auth1Activity.this, HomeActivity.class);
startActivity(intent);
finish();
}
}
};

Why my getUID always be null?

I made an app that can let user log in and set marker on the google map and the marker connect to a chatroom that belongs to the user who set it.
I use firebase mail authentication ,the problem is that i can't get the uid and it's null,i tried a lot of ways,but it still didn't work.
Actually I can sotre my account data in firebase in createActivity with uid and it work,but when I switch to other activity ,the uid became null,I ask this before and someone told me to use this code:
Intent intent = new Intent(CreateActivity.this, MainActivity.class);
intent.putExtra("uid", currentUid);
startActivity(intent);
But it doesn't work.
can someone please help me find where is the problem ,here is my relative code:
LoginActivity:
public void login(View v){
final EditText edUserid = (EditText) findViewById(R.id.eduser);
final EditText edPass = (EditText) findViewById(R.id.edpass);
final String email = edUserid.getText().toString();
final String password = edPass.getText().toString();
if (TextUtils.isEmpty(email)) {
Toast.makeText(getApplicationContext(), "請輸入電子郵件!", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(password)) {
Toast.makeText(getApplicationContext(), "請輸入密碼", Toast.LENGTH_SHORT).show();
return;
}
//authenticate user
auth.signInWithEmailAndPassword(email, password)
.addOnCompleteListener(LoginActivity.this, new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
// there was an error
if (password.length() < 6) {
edUserid.setError("密碼太短，請輸入超過6個字元!");
} else {
Toast.makeText(LoginActivity.this, "登入失敗", Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(getApplicationContext(),"登入成功",Toast.LENGTH_LONG).show();
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
auth = FirebaseAuth.getInstance();
FirebaseUser user = auth.getCurrentUser();
String currentUid = user.getUid();
intent.putExtra("uid", currentUid);
startActivity(intent);
finish();
}
}
});
}
CreateActivity:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create);
auth = FirebaseAuth.getInstance();
FirebaseDatabase database = FirebaseDatabase.getInstance();
final DatabaseReference myRef = database.getReference();
myRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
public void create(View v){
EditText Edcount = (EditText)findViewById(R.id.edcount);
EditText Edpass = (EditText)findViewById(R.id.edpass);
EditText Eduser = (EditText)findViewById(R.id.userid);
EditText Edpassag = (EditText)findViewById(R.id.edpassag);
final String email = Edcount.getText().toString().trim();
final String id = Eduser.getText().toString().trim();
final String password = Edpass.getText().toString().trim();
String password2 = Edpassag.getText().toString();
if (TextUtils.isEmpty(email)) {
Toast.makeText(getApplicationContext(), "請輸入電子郵件!", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(id)) {
Toast.makeText(getApplicationContext(), "請輸入用戶名!", Toast.LENGTH_SHORT).show();
return;
}
if (TextUtils.isEmpty(password)) {
Toast.makeText(getApplicationContext(), "請輸入密碼!", Toast.LENGTH_SHORT).show();
return;
}
if (password.length() < 6) {
Toast.makeText(getApplicationContext(), "密碼太短，請輸入超過6個字元!", Toast.LENGTH_SHORT).show();
return;
}
if(!password.equals(password2)){
Toast.makeText(getApplicationContext(), "密碼前後不符!", Toast.LENGTH_SHORT).show();
return;
}
auth.createUserWithEmailAndPassword(email, password)
.addOnCompleteListener(CreateActivity.this, new OnCompleteListener<AuthResult>() {
public void onComplete( Task<AuthResult> task) {
Toast.makeText(CreateActivity.this, "創建成功，歡迎使用SeeDate", Toast.LENGTH_SHORT).show();
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Toast.makeText(CreateActivity.this, "認證失敗或帳號已存在" ,
Toast.LENGTH_SHORT).show();
} else {
FirebaseDatabase database = FirebaseDatabase.getInstance();
FirebaseUser user = auth.getCurrentUser();
String currentUid = user.getUid();
DatabaseReference myRef = database.getReference("Contacts/" + currentUid);
ContactInfo contact1 = new ContactInfo(email,id,password);
myRef.setValue(contact1);//將會員資料寫入FIREBASE
Intent intent = new Intent(CreateActivity.this, MainActivity.class);
intent.putExtra("uid", currentUid);
startActivity(intent);
finish();
}
}
});
}
}
MainActivity:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
auth = FirebaseAuth.getInstance();
//get current user
authListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
auth = FirebaseAuth.getInstance();
FirebaseUser user = auth.getCurrentUser();
if (user != null) {
// user auth state is changed - user is null
// launch login activity
userUID = getIntent().getStringExtra("uid");
}
else{
startActivity(new Intent(MainActivity.this, LoginActivity.class));
finish();
}
}
};
}
public void onStart() {
super.onStart();
auth.addAuthStateListener(authListener);
}
#Override
public void onStop() {
super.onStop();
if (authListener != null) {
auth.removeAuthStateListener(authListener);
}
}
}
MapFragment(store the marker part):
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (FirebaseAuth.getInstance().getCurrentUser() == null) {
Intent intent = new Intent(getActivity(),LoginActivity.class);
startActivity(intent);
}
else{
MainActivity a ;
a = (MainActivity)getActivity();
a.userUID = userUID1;
Log.d("TAG", userUID1);
// userUID = (String) getActivity().getIntent().getExtras().get("uid");
}
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mview = inflater.inflate(R.layout.fragment_map, container, false);
return mview;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mMapView = (MapView)mview.findViewById(R.id.mapView);
if(mMapView != null){
mMapView.onCreate(null);
mMapView.onResume();
mMapView.getMapAsync(this);
mFirebaseDatabase = FirebaseDatabase.getInstance();
mFirebaseRef = mFirebaseDatabase.getReference("Map/" + userUID1);
mFirebaseRef.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
LatLng myLatLon = dataSnapshot.getValue(FirebaseMarker.class).toLatLng();
// stash the key in the title, for recall later
Marker myMarker = mgoogleMap.addMarker(new MarkerOptions()
.position(myLatLon).draggable(true).icon(BitmapDescriptorFactory.fromResource(R.drawable.seedloc2)).title(dataSnapshot.getKey()));
// cache the marker locally
markers.put(dataSnapshot.getKey(), myMarker);
}
#Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
LatLng myLatLon = dataSnapshot.getValue(FirebaseMarker.class).toLatLng();
// Move markers on the map if changed on Firebase
Marker changedMarker = markers.get(dataSnapshot.getKey());
changedMarker.setPosition(myLatLon);
}
#Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
#Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
Marker deadMarker = markers.get(dataSnapshot.getKey());
deadMarker.remove();
markers.remove(dataSnapshot.getKey());
Log.v(TAG, "moved !" + dataSnapshot.getValue());
}
#Override
public void onCancelled(DatabaseError databaseError) {
Log.v(TAG, "canceled!" + databaseError.getMessage());
}
});
}
}
#Override
public void onMapReady(final GoogleMap googleMap) {
MapsInitializer.initialize(getContext());
mgoogleMap = googleMap;
googleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
#Override
public boolean onMarkerClick(Marker marker) {
// Remove map markers from Firebase when tapped
FirebaseDatabase.getInstance().getReference();
// String user = ContactInfo.getAccount();
CustomInfoWindowAdapter adapter = new CustomInfoWindowAdapter(MapFragment.this);
googleMap.setInfoWindowAdapter(adapter);
marker.setTitle("的種子");
marker.setSnippet("點選聊天");
marker.showInfoWindow();
// Intent intent = new Intent(getActivity(),ChatActivity.class);
// startActivity(intent);
return true;
}
});
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
#Override
public void onMapClick(final LatLng latLng) {
// Taps create new markers in Firebase
// This works because jackson can figure out LatLng
mFirebaseRef.push().setValue(new FirebaseMarker(latLng));
}
});
mgoogleMap.setOnMarkerDragListener(new GoogleMap.OnMarkerDragListener() {
#Override
public void onMarkerDragStart(Marker marker) {
// not implemented
}
#Override
public void onMarkerDrag(Marker marker) {
// not implemented
}
#Override
public void onMarkerDragEnd(Marker marker) {
mFirebaseRef.child(marker.getTitle()).setValue(new FirebaseMarker(marker.getPosition()));
}
});
}
}
If you need more information,I'll update it.

You need to change this line:
userUID = getIntent().getStringExtra("uid");
with this line:
String userUID = user.getUid();
Log.d("TAG", userUID);
Hope it helps.

If I donot miss understand, the MapFragment is a part of your MainActivity. Your problem comes from this:
authListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
auth = FirebaseAuth.getInstance();
FirebaseUser user = auth.getCurrentUser();
if (user != null) {
userUID = getIntent().getStringExtra("uid");
}
else{
startActivity(new Intent(MainActivity.this, LoginActivity.class));
finish();
}
}
};
As I can see, your userUID is null until there's an onAuthStateChanged changed. To sovlve it, I suggest to move this line to the onCreate of MainActiviy as your uid is passed to Intent in previous activity.