firebase

Firebase in Flutter Web

Firebase recently added Flutter Web support for Firestore, Firebase Auth and Firestore Storage. Here's how I set up a pre-existing Flutter + Firestore mobile app to run on Web. Set up the Web projectFirst I ran flutter create . as instructed at https://flutter.dev/docs/

flutter

Fixing `Execution failed for task ':firebase_auth:compileReleaseJavaWithJavac'. java.lang.NullPointerException (no error message)`

My Flutter app stopped compiling today, with the following exception: Execution failed for task ':firebase_auth:compileReleaseJavaWithJavac'. > java.lang.NullPointerException (no error message) A search led me to https://github.com/flutter/flutter/issues/27090, which states you should migrate to AndroidX

dart web

Fixing `CastError: Instance of 'minified:aR<String, dynamic>': type 'minified:aR<String, dynamic>' is not a subtype of type 'minified:b0'`

After I updated my package dependencies on a project I had not run for a long time, I tested it in debug mode using webdev serve. Things ran fine! So I proceeded to deploy it to production with webdev build. This time, upon running

flutter

How to write unit tests with Firebase in Flutter

I've recently published a few packages to help write unit tests for Flutter apps that use Firebase. This includes Firestore, Firebase Storage, Firebase Authentication with Google Sign In. Quick links to the packageshttps://pub.dev/packages/cloud_firestore_mockshttps://pub.dev/packages/firebase_storage_

flutter

Authentication broke after updating FirebaseAuth

I had written a post on how to set up Authentication with Firebase in Flutter (see Authentication in Flutter). But Firebase auth has recently released a breaking change with v0.14. Here's how to fix it. The change is that signInWithCredential used to return

cloud functions

Firebase Cloud Functions

Firebase Functions are a way to run server-side code hosted by Firebase servers. It is an easy way to implement routes, or code that reacts to certain events, like changes to a database. The code is written in Javascript or TypeScript. Hello WorldFrom the

cloud messaging

Notifications in Flutter

I used Firebase Messaging to implement notifications in Flutter. Despite the many documentations around, it took me a while to get my first notification in. FeaturesWith Firebase Messaging, you can send messages to: a single device, identified by an FCM token.topics: typically for

flutter

Authentication in Flutter

Authentication and integrating a database are the two building blocks of any app. We use authentication to make sure users have access only to their own data. Initial set upSetting up Firebase Auth as per the docs: https://pub.dartlang.org/packages/firebase_auth

flutter

Integrating Firebase into a Flutter app

Following the Flutter Firebase codelab: Created a Firebase project. Added the debug SHA signature. To get it, run keytool -list -v -alias androiddebugkey -keystore ~/.android/debug.keystore with no password. Ran it in the emulator. It failed with an error about multidex. Luckily the

android

Enabling Firebase Database for Release builds

After integrating Firebase Database, my alpha builds started failing with an unhelpful "Developer Error". I found this post explaining you should whitelist the SHA1 of both the debug and release version in the Firebase Console. Indeed, I had forgotten to add the

android

Working with Firebase Realtime Database

In the previous post, we set up authentication. Now that the user is authenticated, we can store and retrieve data from the database specific to that user. Modeling the data The Firebase Database documentation explains how to model data in a way that avoids

android

Beginning Android – Authentication

Now that the skeleton of the app is made and it is pushed to the Alpha channel, it is time to build real functionality. In the previous post, we discussed how to set up a new Android app, sign it and publish it to