Saving Data on Android

SeTng up Real/me Database
In Chapter 11, "Firebase Overview," you added your app to a Firebase project. Now, 
you need to connect your app to Firebase, to enable its services.
Prerequisites
There are few requirements that you need to fulfill in order to setup Firebase with 
Android.
• To run your app on a physical device or an emulator you need to have at least 
API 
level 9
, which is Android 2.3 
Gingerbread
.
• The device must have 
Play Services 9.0
 or later. You can check your Play Services 
version in the settings of the device.
• Your app needs to use 
Gradle 4.1
 or higher.
• Your app needs to target 
API level 16
 or later.
Connec/ng the app to the project
Go to the Firebase console and open 
WhatsUp
 project that you created.
Saving Data on Android
Chapter 12: Introduction to Firebase Realtime Database
raywenderlich.com
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Click on the Android icon to connect your Android app with Firebase. You should see 
the following  :
Registering app
The first step is to register your app. For that, you need two pieces of information. 
The first one is your app's package name which you can find in the app-level