Basic Firebase database save

Question

Anyone looking at this the below is the correct answer and I had everything setup correctly. I still dont no what the issue is. I was loggin in with facebook, using that to

Answer 1

Actually you are referencing a child 'message' which is logically not there,

If you want to name you root of the database simply follow the steps

DatabaseReference myRef1 = FirebaseDatabase.getInstance().getReference(); //Getting root reference
myRef1.setValue("Hello, World!");

and if you want to give some value to your child in database, Make sure you have a child in your database

DatabaseReference myRef1 = FirebaseDatabase.getInstance().getReference(); //Getting root reference
DatabaseReference myRef = myRef1.child("message"); //Write your child reference if any
myRef.setValue("Hello, World!");

It will overwrite the value of your child to 'Hello World'

Go to Firebase console and create a project and give it a valid packageName which you will use. and download google-service.json file and add this file to app folder by changing your Android View to Project View.

Add these lines into Project:Gradle

dependencies {
    classpath 'com.google.gms:google-services:3.0.0'
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

Add these into App:Gradle

dependencies {
    compile 'com.google.firebase:firebase-core:9.0.0'
    compile 'com.google.firebase:firebase-database:9.0.0'
}

// ADD THIS AT THE BOTTOM OF YOUR APP GRADLE

apply plugin: 'com.google.gms.google-services'

Note : Do overwrite the rules in your database . If you are not implementing login authentication.

{
  "rules": 
   {
    ".read": true,
    ".write": true,
   }
}

And add this line in Application or in onCreate of Activity

Firebase.setAndroidContext(this);

Answer 2

seems, i found the answer. It helps me!

I have used before android studio version 1.5 And that's why (maybe not) but i could't upgrade required firebase libs to 9.0.2 All this time i have used 9.0.0

So firstly i upgrade my android studio to updated stable version 2.2 and then update version of dependencies to next ones:

compile 'com.google.firebase:firebase-core:9.0.2'
compile 'com.google.firebase:firebase-auth:9.0.2'
compile 'com.google.firebase:firebase-database:9.0.2'

And now all values are saved to database from android app.

So do two things: 1. update android studio to last stable version 2. update firebase required libs versions

Hope this answer will help