带有firebase android的动态标签数量

Question

I have a group of category strings stored in FirebaseFirestore. Now, i want to show this list of strings with tabs using a tabLayout. This means that the number of tabs would be dynamic which would be set according to whats present on the database. For now, i know only how to show fixed number of tabs using this line of code:

TabLayout tabLayout = findViewById(R.id.tabLayout);
 tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
 tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
 tabLayout.addTab(tabLayout.newTab().setText("Tab3"));

So, how do i make the tabs dynamic such that the text and number of tabs are set from whats coming from the list of strings from my database? Please help.

Answer 1

Say that each tab is stored in a document in Firestore in a collection named tabs . You can then get all documents in that collection and create a tab with the ID of each document with:

db.collection("tabs")
    .get()
    .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
        @Override
        public void onComplete(@NonNull Task<QuerySnapshot> task) {
            if (task.isSuccessful()) {
                for (QueryDocumentSnapshot document : task.getResult()) {
                    Log.d(TAG, document.getId() + " => " + document.getData());
                    tabLayout.addTab(tabLayout.newTab().setText(document.getId()));
                 }
            } else {
                Log.d(TAG, "Error getting documents: ", task.getException());
            }
        }
    });