Question

I have a protobuf message of type OrderList

message OrderList {
  repeated Order orders = 1;
}

I want to pass this list of orders into a custom adapter that I wrote.

void guiUpdateOrders(final OrderList new_order_list) {
  setListAdapter(new OrderRowAdapter(OrderActivity.this, R.layout.order_row, 
            (ArrayList<Order>) new_order_list.getOrdersList()));
}

But when I do this, I get the following error

java.lang.ClassCastException: java.util.Collections$UnmodifiableRandomAccessList

Answer 1

Weird that the ListView wants a modifiable copy of the List to be supplied to the adapter.

Can you try giving it what it wants?

 setListAdapter(new OrderRowAdapter(OrderActivity.this, R.layout.order_row, 
        new ArrayList(new_order_list.getOrdersList())));