AndroidTutorialForBeginners/Firebase_auth.java at master · wiselh/AndroidTutorialForBeginners · GitHub

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// Fire base sign in

//add to grade
compile'com.google.firebase:firebase-auth:9.6.1'

//code


/**
 * Activity to demonstrate anonymous login and account linking (with an email/password account).
 */
//1- define
privatestaticfinalStringTAG = "AnonymousAuth";

// [START declare_auth]
privateFirebaseAuthmAuth;
// [END declare_auth]

// [START declare_auth_listener]
privateFirebaseAuth.AuthStateListenermAuthListener;
// [END declare_auth_listener]

//2- initiailze OnCreate()
// [START initialize_auth]
mAuth = FirebaseAuth.getInstance();
// [END initialize_auth]

// [START auth_state_listener]
mAuthListener = newFirebaseAuth.AuthStateListener() {
@Override
publicvoidonAuthStateChanged(@NonNullFirebaseAuthfirebaseAuth) {
FirebaseUseruser = firebaseAuth.getCurrentUser();
if (user != null) {
// User is signed in
Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
 } else {
// User is signed out
Log.d(TAG, "onAuthStateChanged:signed_out");
 }
// [START_EXCLUDE]
updateUI(user);
// [END_EXCLUDE]
 }
 };
// [END auth_state_listener]
privatevoidupdateUI(FirebaseUseruser) {
hideProgressDialog();
StringEmail=user.getEmail();
StringUid= user.getUid();
 }

// [START on_start_add_listener]
@Override
publicvoidonStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
 }
// [END on_start_add_listener]

// [START on_stop_remove_listener]
@Override
publicvoidonStop() {
super.onStop();
if (mAuthListener != null) {
mAuth.removeAuthStateListener(mAuthListener);
 }
 }
// [END on_stop_remove_listener]

privatevoidsignInAnonymously() {
showProgressDialog();
// [START signin_anonymously]
mAuth.signInAnonymously()
 .addOnCompleteListener(this, newOnCompleteListener<AuthResult>() {
@Override
publicvoidonComplete(@NonNullTask<AuthResult> task) {
Log.d(TAG, "signInAnonymously:onComplete:" + task.isSuccessful());

// 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()) {
Log.w(TAG, "signInAnonymously", task.getException());
Toast.makeText(MainActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
 }

// [START_EXCLUDE]
hideProgressDialog();
// [END_EXCLUDE]
 }
 });
// [END signin_anonymously]
 }

privatevoidsignOut() {
mAuth.signOut();

 }

privatevoidlinkAccount() {


// Get email and password from form
Stringemail = "User_Email";
Stringpassword ="User_Password";

// Create EmailAuthCredential with email and password
AuthCredentialcredential = EmailAuthProvider.getCredential(email, password);

// Link the anonymous user to the email credential
showProgressDialog();
// [START link_credential]
mAuth.getCurrentUser().linkWithCredential(credential)
 .addOnCompleteListener(this, newOnCompleteListener<AuthResult>() {
@Override
publicvoidonComplete(@NonNullTask<AuthResult> task) {
Log.d(TAG, "linkWithCredential:onComplete:" + task.isSuccessful());

// 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(MainActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
 }

// [START_EXCLUDE]
hideProgressDialog();
// [END_EXCLUDE]
 }
 });
// [END link_credential]
 }


@VisibleForTesting
publicProgressDialogmProgressDialog;

publicvoidshowProgressDialog() {
if (mProgressDialog == null) {
mProgressDialog = newProgressDialog(this);
mProgressDialog.setMessage(getString(R.string.loading));
mProgressDialog.setIndeterminate(true);
 }

mProgressDialog.show();
 }

publicvoidhideProgressDialog() {
if (mProgressDialog != null && mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
 }
 }

@Override
publicvoidonStop() {
super.onStop();
hideProgressDialog();
 }