Firebase Query not being updated - firebase

Question

I want my firebase database link to be updated depending on what the user keys in inside the searchview but the link is not updated unless I open another activity and jump back to it.I have attacked my code in the bottom. So how do I refresh it automatically ?
sv.setOnQueryTextListener(new SearchView.OnQueryTextListener()
{
#Override
public boolean onQueryTextSubmit(String query) {
query = sv.getQuery().toString();
Toast.makeText(MainMenu.this,query, Toast.LENGTH_SHORT).show();
makeItem();
return true;
}
#Override
public boolean onQueryTextChange(String newText) {
return false;
}
});
public void makeItem ()
{
lv = findViewById(R.id.listView);
db = FirebaseDatabase.getInstance().getReferenceFromUrl("https://vsem-inventory.firebaseio.com/ItemList").orderByChild("ProductName").startAt(query).endAt(query+"\uf8ff");
FirebaseListOptions<ItemObject> options = new FirebaseListOptions.Builder<ItemObject>()
.setLayout(R.layout.content_main_menu_list)
.setQuery(db,ItemObject.class)
.build();
mAdapter = new FirebaseListAdapter<ItemObject>(options) {
#Override
protected void populateView(#NonNull View v, #NonNull ItemObject model, int position) {
final TextView tvAmount = v.findViewById(R.id.amount);
final TextView tvName = v.findViewById(R.id.name);
final TextView tvSerial = v.findViewById(R.id.serialNo);
final TextView tvSupplier = v.findViewById(R.id.supplierName);
final ImageView more = v.findViewById(R.id.more);
ImageView statusimg = v.findViewById(R.id.status);
Drawable paidIcon = v.getResources().getDrawable(R.drawable.succes);
Drawable lateIcon = v.getResources().getDrawable(R.drawable.late);
tvName.setText(model.getProductName());
tvSerial.setText(model.getSerialNo());
tvAmount.setText(model.getQuantity());
tvSupplier.setText(model.getModel());
final String Remarks = model.getRemarks();
final String cat = model.getCategory();
if(model.getQuantity().equals("0"))
statusimg.setImageDrawable(lateIcon);
else
statusimg.setImageDrawable(paidIcon);
more.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
String serialNo = tvSerial.getText().toString();
String itemName = tvName.getText().toString();
String quan = tvAmount.getText().toString();
String supplier = tvSupplier.getText().toString();
showMenu(itemName,more,serialNo,quan,supplier,cat,Remarks);
}
});
}
};
lv.setAdapter(mAdapter);
}

Answer 1

The standard way is to call notifyDataSetChanged() after setting your adapter to your list view
Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
mAdapter.notifyDataSetChanged();
Although I have seen some situations where only using this does not work and must be followed by these 2 commands.
lv.invalidateViews();
lv.scrollBy(0, 0);
And if all else comes to fail falling back on destroying and redrawing the list view might be your only viable option.
lv.destroyDrawingCache();
lv.setVisibility(ListView.INVISIBLE);
lv.setVisibility(ListView.VISIBLE);
EDIT : After looking at it a while more I just noticed you're missing listeners for your firebase. I assume you already have them somewhere as you already have the list but failing your refresh functions, what you can try is restarting the listeners whenever you're done with a query.
lv.setAdapter(mAdapter);
mAdapter.stopListening();
mAdapter.startListening();