How to stop retrieve data from Firebase?

Question

Stop retrieve data from Firebase after its loaded.

This is my code:

databaseReference.child("SHARE").addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshot ds : dataSnapshot.getChildren()) {
            information spacecraft = ds.getValue(information.class);
            spacecrafts.add(spacecraft);
        }
        adapter adapterView= new adapter(MainActivity.this, spacecrafts);
        gridView.setAdapter(adapterView);
    }
}

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Add single value listener if you want to load your data once and not in real time. Hope it helps — Rahul Singh Chandrabhan, Jan 04 '18 at 04:37

score 1 · Answer 1 · answered Jan 04 '18 at 05:10

Use addListenerForSingleValueEvent instead of addValueEventListener if you want to read the whole data once.

Or if you want to get update from onDataChange, you can remove the listner,

 ValueEventListener eventListener = databaseReference.child("SHARE").addValueEventListener(new   ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for (DataSnapshot ds : dataSnapshot.getChildren()) {

            information spacecraft = ds.getValue(information.class);
            spacecrafts.add(spacecraft);

        }
        adapter adapterView= new adapter(MainActivity.this, spacecrafts);
        gridView.setAdapter(adapterView);
    }

To remove the listener,

databaseReference.child("SHARE").removeEventListener(eventListener);

I want to stop receiving data after receiving it not delete it ? — mohamed, Jan 04 '18 at 11:45
removing the listener will not delete.. will just stop receiving the data. — Priya, Jan 05 '18 at 04:26

score 1 · Answer 2 · answered Jan 04 '18 at 05:32

Use addListenerForSingleValueEvent()

databaseReference.child("SHARE").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot ds : dataSnapshot.getChildren()) {

                information spacecraft = ds.getValue(information.class);
                spacecrafts.add(spacecraft);

            }
            adapter adapterView= new adapter(MainActivity.this, spacecrafts);
            gridView.setAdapter(adapterView);
        }

have a look on this answer https://stackoverflow.com/a/41579337/5868103

I'm sorry, I didn't understand. What do you mean data is not updated? @mohamed — Rosário Pereira Fernandes, Jan 07 '18 at 22:21

How to stop retrieve data from Firebase?

2 Answers2