com.google.firebase.database.DatabaseException: Serializing Arrays is not supported, please use Lists instead

Question

I am trying to persist a custom object using the following code:

DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference();
Databas         


        

Answer 1

//this will recreate your Object list by the constructor


private void handleData(){ 

    orderList = Db.getCarts();
    orders = new ArrayList<>();
    Double totalPrice = 0.0;

    for (Order order : orderList){
        // totalPrice = totalPrice + ( price * quantity )
        totalPrice += (Double.valueOf(order.getPrice())* Integer.valueOf(order.getQuantity()));
        orders.add(new Order(order.getProductId(),order.getProductName(),order.getQuantity(),order.getPrice(),order.getDiscount(),order.getImage()));
    }
}

 private void alertDialog() {

    AlertDialog.Builder alert = new AlertDialog.Builder(getContext());
    alert.setTitle("One more step!");
    alert.setMessage("Enter your address");

    final EditText edtaddress = new EditText(getContext());
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.MATCH_PARENT
    );

    edtaddress.setLayoutParams(layoutParams);
    alert.setView(edtaddress);
    alert.setIcon(R.drawable.ic_shopping_cart_black_24dp);

    alert.setPositiveButton("YES", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Request request = new Request(
                    Common.currentUser.getPhone(),
                    Common.currentUser.getName(),
                    edtaddress.getText().toString(),
                    textTotal.getText().toString(),
                    orders
            );

            // Submit to firebase
            // We will using system.currentMillis to key
            requestReference.child(String.valueOf(System.currentTimeMillis()))
                    .setValue(request);
            //Delete cart
            Db.deleteCart();
            Toast.makeText(getContext(), "Thank you , Order Place", Toast.LENGTH_SHORT).show();
            getActivity().finish();
        }
    });

    alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
        }
    });

    alert.show();

}