Htykuut

I think this is a crazy question but I'm new to firebase...Here is my problem...
I want to retrieve firebase data to textview, imageview and listview! this is my example database structure..it has many other nodes like this 😁
https://i.stack.imgur.com/JURr3.png

So, I add username to a textview, profile photo to imageview, birthdate to a textview and there are many other nodes like messages and other usernames(in an activity).It's ok but the problem is "it takes to much time to retrieve data to each view and then it shows all the data at the same time"..I mean it don't show each data simultaneously after loading but show all requested data to all views after loading. What I want is a view after a view loading and showing...😢😢

I don't know how to explain my problem and how to call it as I have bad Eng skill...😭😭
Here is UI of that activity after fetching data.(Birthdate and some data haven't added yet). https://i.stack.imgur.com/GRX0O.png This is the photo while retrieving with default image and text. https://i.stack.imgur.com/iEhv9.png

Not sure how you are feting data, ideally this should be the set of steps that you should be doing.
1) Fetch all the data(all children data as well) from that node and put it in a list.
2) Pass the data to a RecyclerView and populate it this was there wont be any lag.

This is an example code to fetch all the child nodes

myQuery.addValueEventListener(new ValueEventListener() {

    @Override

    public void onDataChange(DataSnapshot dataSnapshot) {

        for (DataSnapshot postSnapshot: dataSnapshot.getChildren()) {

            // TODO: Add to list to send it to recyclerview

        }

    }



    @Override

    public void onCancelled(DatabaseError databaseError) {

        // Getting Post failed, log a message

        Log.w(TAG, "loadPost:onCancelled", databaseError.toException());     

    }

});

Hopefully, this will help you.

Step 1 :

Use Sqlite as a local database to store your data as well along wid maybe if u r using Firebase Realtime Database. Everytime a data is loaded for the first time , it will also be stored in the local database. So the next time when u open the app, u would see the results that u r expecting !

Step 2:

If u r using Firebase Realtime Database as a backend, make use of the Offline Data Handling feature which firebase provides. This too can solve your problem !

My personal advice is not to reach firebase data directly from client because of possible authentication and performance problems due to unintented implementation and usage of firestore api.

Instead, use Firebase cloud functions and write a service for what you need. To call those services from the app, you can use Firebase calls. You may suffer from cold boot but you can solve it with a warm up process ex. call those functions every minute with a cron job that can be set via cron-job.org