断言失败：第38行pos 12：＆＃39; displayName！= null＆＃39;：不是真的

Question

Firebase Flutter登录获取错误

  

04-28 14：31：21.261 7687-8012 / com.companyname.firebaselogin I / flutter：＆＃39; package：google_sign_in / google_sign_in.dart＆＃39;：失败的断言：第38行：＆＃39; displayName ！= null＆＃39;：不是真的。

使用相同的文档代码 -

Future<FirebaseUser> _handleSignIn() async {
final GoogleSignIn _googleSignIn = new GoogleSignIn();
GoogleSignInAccount googleUser = await _googleSignIn.signIn();

GoogleSignInAuthentication googleAuth = await googleUser.authentication;
FirebaseUser user = await _auth.signInWithGoogle(
  accessToken: googleAuth.accessToken,
  idToken: googleAuth.idToken,
);
print("signed in " + user.displayName);
return user;
}

  

firebase_auth：＆＃34; ^ 0.5.5＆＃34;

     

google_sign_in：＆＃34; ^ 3.0.2＆＃34;