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Need to transfer the Firebase data to MySQL and synchronize

I am creating an Android project and in our app, we are going to store the abstract user data and we are creating in Firebase because of its feature of real-time updating. But for doing data analysis we need to store the data in some database, for doing the query operation we have thought of MySQL but on searching regarding my query I have found it can be done but it requires NodeJS support on the server which is not provided by our hosting provider. Is there some other way to handle this problem?

How to share my to do list app data between 2 android devices

I am working on to do list app and I saved data in SQLITE and I want to share app data to my friend who install my app but he away from me with along distance so I can't use Bluetooth and socket.
Please help me and thanks in advance .
https://cloud.google.com/solutions/mobile/firebase-app-engine-android-studio

You could have used your own backend web service and send it through with JSON data. If you do not want to create a backend service, just use firebase cloud real time database which is very suitable for your project. Firebase Database Instead of creating local SQLite database, save your data into the database which is in the cloud, whenever your friend open the activity or application, fetch data from backend service/firebase database whatever you like

Transferring data from Sql server to SQLITE with Android

I have software that connects to an SQL database. I am now working on the software on Android, using SQLite, and need to transfer the SQL database (with the data) to SQLite.
How can I do this?

One way would be to create the SQLite database on the device and download and persist the data into the local SQLite data base. A good place to read up on how to do this is in the Android docs.
Another possible solution would be to create the SQLite database at the server level and download it directly within the Android app then open it. But if you modify anything locally within the app you would need to send data back to the server to keep in sync.

Create Rest API that will fetch my SQL data in JSON format.
Now from android app access that API to get data and insert that data in in your SQLite.
or if you want to fetch it in background process use sync Adapter.

How does Firebase Database Instances retrieve data in realtime?

I just built my first app. It's an Group Messaging App for which I used Firebase Realtime Database. I followed this tutorial to build my app.
The chat is working flawlessly and in realtime ie any changes into the Database are retrieved and reflected within seconds on my app. Actually, being bit curious, I didn't just copy paste all those code lines instead I'm trying to understand meaning behind each statement. So, I'm confused with one of my doubts:
How does this work in realtime (chats pop up immediately)? I was reading about Firebase Database here and they mention ValueEventListener is used to update app data in realtime but what's used here?

From the documentation:
Realtime: Instead of typical HTTP requests, the Firebase Realtime Database uses data synchronization—every time data changes, any connected device receives that update within milliseconds.
Network-wise this is achieved through WebSockets, which is used both on the server and in the client side Firebase library.
Additionally, the "Realtime Database API is designed to only allow operations that can be executed quickly".
Edit: The Firebase client library sets up one WebSocket to communicate with the Realtime Database, which is used for all the communication with the Realtime Database, both reading/subscribing and updating/pushing (unless you use the REST API).
Edit 2: In the tutorial you did you used the FirebaseListAdapter which abstracts away how the data synchronization is done. It's fourth parameter is a reference to a Realtime Firebase Database location that it will sync with (using WebSocktes), and populate the list for you. It takes each entry of the synced data and puts it into new Java objects of the model class you provide as second argument, namely ChatMessage.class.

Syncing SQLite database with remote mysql data in android

How to synchronise SQLite database and remote MySQL data in android?
To make it clear, I want to know how syncing between sqlite data and remote mysql works .. i.e., when the remote mySQL database is updated, SQLite data should also be updated without any button press or scroll down? How can I implement that using Android Studio and Wamp server ?
Thanks in advance!

I guess you can use broadcast receiver inside a service of your android application. If not you can write a service and inside the service you can use a timer to send http request to the server and keep syncing. To get a knowledege about syncing a SQlite database with remote mysql database refer to this tutorial and if you need it to happen without a button press then implement the code in the following tutorial inside a service and remember to use a timer.
TUTORIAL LINK

I don't know any way to make a mirror of your mysql database on your android's sqlite database. There are two ways I can think off when it comes to synchronizing data on your phone. The first one is by using a syncadapter. But this will only pull the data from the server and so you won't have your synchronization as soon as an update is done.
The second one is by using push notifications. With FCM, firebase cloud messaging, or GCM, google cloud messaging, you can tell your server to send a message to every phone that is connected to it. Your phone can then handle the message and synchronize itself with your database. Obvisouly in either solutions you won't have a direct access to your database as it brings huge security problems so you'll need to pass by a web server with an API to connect your application to your database.
Here are some useful links about FCM, Syncadapters, etc