firebae

[Flutter/Dart] Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms....

Phenomenon When I try to sign in to Firebase with google_sign_in, it fails with the following error. Unhandled Exception:...

[Flutter/dart] When Firebase Messaging notification is tapped with the app is in the background

Overview In many cases, you'll send a message with Firebase Messaging and take some action when the notification is tapped (eg to go to a...

[Flutter/dart] null check operator used on a null value messaging

Overview A title error has occurred at FirebaseMessaging.onBackgroundMessage(). Cause and Solution The delegate passed to the argument of...

[Flutter/dart] Send a test message of Firebase Messaging

Overview When you use Firebase Messaging, you'll want to send a test to your device. It took a little time, so I will summarize how to do...

[Cloud Functions] Apply the same function to different firebase projects

Overview If you are using firebase in your smartphone app, you may use different firebase projects for development and production. If you...

[Node.js/cloud functions] Send mail from yahoo mail account with nodemailer

Overview In the smartphone app, I implemented a function that notifies me by e-mail when a certain type of data is posted using...