Attempt to invoke virtual method 'java.lang.String com.google.android.gms.auth.api.signin.GoogleSignInAccount.getIdToken()' on a null object reference com.pravin.yashlalit.msbtestudymaterial.Authentications.SigninActivity.FirebaseGoogleAuth
public class SigninActivity extends AppCompatActivity {
SignInButton signInButton;
GoogleSignInClient mGoogleSignInClient;
String TAG="SigninActivity";
FirebaseAuth mAuth;
int RC_SIGN_IN =1;
String personName,personGivenName,personEmail,personId;
Uri personPhoto;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_signin);
initializations();
}
private void initializations() {
signInButton = findViewById(R.id.google_btn);
mAuth = FirebaseAuth.getInstance();
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleSignInClient = GoogleSignIn.getClient(this,gso);
signInButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
signIn();
}
});
}
private void signIn() {
Intent signInIntent = mGoogleSignInClient.getSignInIntent();
startActivityForResult(signInIntent,RC_SIGN_IN);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==RC_SIGN_IN)
{
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleSignInResult(task);
}
}
private void handleSignInResult(Task<GoogleSignInAccount> task) {
try{
GoogleSignInAccount acc = task.getResult(ApiException.class);
Toast.makeText(getApplicationContext(),"Signing Success",Toast.LENGTH_SHORT).show();
FirebaseGoogleAuth(acc);
}catch(ApiException e)
{
Toast.makeText(getApplicationContext(),"Signing FAiled",Toast.LENGTH_SHORT).show();
FirebaseGoogleAuth(null);
}
}
private void FirebaseGoogleAuth(GoogleSignInAccount acc) {
AuthCredential authCredential = GoogleAuthProvider.getCredential(acc.getIdToken(),null);
mAuth.signInWithCredential(authCredential).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful())
{
Toast.makeText(getApplicationContext(),"Firebase Success",Toast.LENGTH_SHORT).show();
FirebaseUser user = mAuth.getCurrentUser();
updateUI(user);
}
else
{
Toast.makeText(getApplicationContext(),"Firebase Failed",Toast.LENGTH_SHORT).show();
updateUI(null);
}
}
});
}
private void updateUI(FirebaseUser user) {
GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(getApplicationContext());
if (account != null)
{
personName = account.getDisplayName();
personGivenName = account.getGivenName();
personEmail = account.getEmail();
personId = account.getId();
personPhoto = account.getPhotoUrl();
/* Toast.makeText(getApplicationContext(),"User Information:" +
"\nName: "+personName+
"\nGiven: "+personGivenName+
"\nEmail: "+personEmail+
"\nId: "+personId+
"\nPhoto: "+personPhoto.toString(),
Toast.LENGTH_SHORT).show();*/
sendUserToSetupActivity(personName,personEmail,personPhoto);
}
}
private void sendUserToSetupActivity(String personName, String personEmail, Uri personPhoto) {
startActivity(new Intent(getApplicationContext(),SetupActivity.class)
.putExtra("Name",personName)
.putExtra("Email",personEmail)
.putExtra("Photo",personPhoto.toString())
);
this.finish();
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = mAuth.getCurrentUser();
if (currentUser != null) {
sendUserToMainActivity();
}
}
private void sendUserToMainActivity() {
startActivity(new Intent(getApplicationContext(), MainActivity.class));
this.finish();
}
}
