Book Image

Mastering Firebase for Android Development

By : Ashok Kumar S
Book Image

Mastering Firebase for Android Development

By: Ashok Kumar S

Overview of this book

Firebase offers a wide spectrum of tools and services to help you develop high-quality apps in a short period of time. It also allows you to build web and mobile apps quickly without managing the infrastructure.Mastering Firebase for Android Development takes you through the complete toolchain of Firebase,including the latest tools announced in Google IO 2018 such as Firebase ML-Kit, FireStore, and Firebase Predictions. The book begins by teaching you to configure your development environment with Firebase and set up a different structure for a Firebase real-time database. As you make your way through the chapters, you’ll establish the authentication feature in Android and explore email and phone authentication for managing the on-boarding of users. You’ll be taken through topics on Firebase crash reporting, Firebase functions, Firebase Cloud, Firebase Hosting, and Cloud Messaging for push notifications and explore other key areas in depth. In the concluding chapters, you will learn to use Firebase Test Lab to test your application before using Firebase Performance Monitoring to trace performance setbacks. By the end of the book, you will be well equipped with the Firebase ecosystem, which will help you find solutions to your common application development challenges.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
Packt Upsell
Application Usage Measuring and Notification, Firebase Analytics, and Cloud Messaging
Bringing Everyone on the Same Page, Firebase Invites, and Firebase App Indexing
Making a Monetary Impact and Firebase AdMob and AdWords
Flexible NoSQL and Cloud Firestore
Analytics Data, Clairvoyant, Firebase Predictions

File metadata

Metadata is essential information about the file uploaded to the Cloud Storage Bucket. We can retrieve and update the metadata. For instance, we can update the content type of the file, we can update the timestamp, and so on. Firebase storage, by default, requires Firebase Authentication to retrieve and update the metadata, but developers can change this in the storage security rules. 

Retrieving File Metadata

Firebase storage can store file content and file metadata, which contains properties such as the content type and timestamp of the file created in Firebase storage. Using getMetadata() on the storage reference instance, we can retrieve the metadata of the file:

StorageReference storageRef = storage.getReference();

StorageReference forestRef = storageRef.child("images/forest.jpg");

publicvoid onSuccess(StorageMetadata storageMetadata){