从Firebase数据库Android中检索数据列表-RetrieveListofdatafromFirebasedatabaseAndroid

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To get those products, please use the following code:

要获得这些产品,请使用以下代码:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference productsRef = rootRef.child("products");
ValueEventListener eventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        for(DataSnapshot ds : dataSnapshot.getChildren()) {
            String product = ds.getKey();
            Log.d("TAG", product);
        }
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
productsRef.addListenerForSingleValueEvent(eventListener);

Your output will be:

你的输出将是:

aa
appledd
bb
fruitrtyyty
//an so on