I am using Google to sign in to my app- so new as well existing user can login in using Gmail( by existing I mean those who have logged in before using google signin). Google uses the same method to Login as well as Sign up- I want to know when my user Sign up and when he logged in. Basically I have an activity that runs only when the present user isn't in my database i.e he's using Google sign in for the first time. Hence next time onwards when he google signs in he shouldn't see that activity!
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
//Then we will get the GoogleSignInClient object from GoogleSignIn class
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
//Now we will attach a click listener to the sign_in_button
//and inside onClick() method we are calling the signIn() method that will open
//google sign in intent
findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
signIn();
}
});
}
@Override
protected void onStart() {
super.onStart();
//if the user is already signed in
//we will close this activity
//and take the user to profile activity
if (mAuth.getCurrentUser() != null) {
finish();
startActivity(new Intent(this, main_activity2.class));
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//if the requestCode is the Google Sign In code that we defined at starting
if (requestCode == RC_SIGN_IN) {
//Getting the GoogleSignIn Task
Task <GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
try {
//Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = task.getResult(ApiException.class);
//authenticating with firebase
firebaseAuthWithGoogle(account);
} catch (ApiException e) {
Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
Log.e("Error", "firebaseAuthWithGoogle:" + acct.getId());
//getting the auth credential
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
//Now using firebase we are signing in the user here
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
Log.e("Error", "signInWithCredential:success");
FirebaseUser user = mAuth.getCurrentUser();
updateUI(user);
Toast.makeText(MainActivity.this, "User Signed In", Toast.LENGTH_SHORT).show();
} else {
// If sign in fails, display a message to the user.
Log.e("Error", "signInWithCredential:failure", task.getException());
Toast.makeText(MainActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
}
// ...
}
});
}
public void updateUI(FirebaseUser account){
if(account != null){
Log.e("Login Success","Came in Update UI");
startActivity(new Intent(MainActivity.this, main_activity2.class));
overridePendingTransition(android.R.anim.fade_in,android.R.anim.fade_out);
}
}
//this method is called on click
private void signIn() {
//getting the google signin intent
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
//starting the activity for result
startActivityForResult(signInIntent, RC_SIGN_IN);
}
This code currently takes every login to one activity now how do I differentiate between First time users and existing ones. I am using Google Firebase for authentication and database!
