在应用程序中使用Facebook登录包时，即使我点击屏幕上的其他位置而不是ID字段，该应用程序也会导航到另一页。 谷歌登录中也存在此问题。 下面是按下登录按钮时调用的功能。

loginfb() async {
    try {
      final result = await Internetaddress.lookup('google.com');
      if (result.isnotEmpty && result[0].rawAddress.isnotEmpty) {
        print('connected');
        signInWithFacebook().whenComplete(() {
          createOdooContact();
          Navigator.of(context).push(
            MaterialPageRoute(
              builder: (context) {
                return Progresspage();
              },),);
        });
      }
    } on SocketException catch (_) {
      print('Not Connected');
      displayCancelDialog();
    }
  }

下面是Facebook登录功能

//* Login the app using Facebook credentials
Future<String> signInWithFacebook() async {
  var facebookLoginResult =
      await facebookLogin.logInWithReadPermissions(['email']);
  var accessToken = facebookLoginResult.accessToken;
  if (facebookLoginResult.status == FacebookLoginStatus.loggedIn) {
    displayProf();
    final AuthCredential credential = FacebookAuthProvider.getcredential(
      accessToken: accessToken.token,);
    final AuthResult authResult =
        (await _auth.signInWithCredential(credential));
    final FirebaseUser user = authResult.user;
    assert(user.email != null);
    assert(user.displayName != null);
    assert(!user.isAnonymous);
    assert(await user.getIdToken() != null);

    assert(!user.isAnonymous);
    assert(await user.getIdToken() != null);

    if (name.contains(" ")) {
      name = name.substring(0,name.indexOf(" "));
    }

    final FirebaseUser currentUser = await _auth.currentUser();
    assert(user.uid == currentUser.uid);
    return 'signInWithFacebook succeeded: $user';
  }
}