Android: offline capabilities using Firebase

 

Firebase apps work offline and enabling disk persistence allows your app to keep all of its state even after an app restart. Firebase also provides several tools for monitoring presence and connectivity state, as we will cover in the lines bellow.

First of all, in order to be able to use Firebase on Android we need to:

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Angular 2.0 – real-time components using Firebase

In earlier post we saw how to build a hello world web component using Angular 2.0 beta.
Now we will create a real-time component using Firebase. We will have 2 components:

  1. adding elements in the list component
  2. listing all the elements component

To build the first component for adding elements in a list, we just need a simple HTML with 2 fields and a button, and some small JS method to send these fields to Firebase.

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A short introduction to Firebase

firebaselogoFirebase is a powerful API to store and sync data in realtime helping front-end developers build realtime apps for the web. You can save data, update data, and listen for data changes in realtime with only a few lines of code. Data is stored as standard JSON and is accessible from any platform. Firebase also has safety and security built in to keep your data and your users data safe.

Adding Firebase to the page

In order to use Firebase in your application you have to incluse the firebase js reference in the page header.

<script src="https://cdn.firebase.com/js/client/2.0.2/firebase.js"></script>
 

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