Question

我的Firebase数据库存在问题。

当我从数据库获取数据时，我将旧数据放在顶部。如何更改它以获取最新数据？

in firebase console new data also are at the bottom

我正在使用listView for FirebaseAdapter。

  // setting adapter
             private void showAdapter() { 
                    fBListAdapter = new FirebaseListAdapter<DiscountProduct>(ListDiscountActivity.this, DiscountProduct.class, R.layout.model_of_product, refDiscount) {
                        @Override
                        protected void populateView(View v, DiscountProduct model, int position) {
                            TextView nameProduct;

                            nameProduct = (TextView) .findViewById(R.id.modelCardNameProduct);

                            nameProduct.setText(model.getNameProduct());
                        }

                    };

                    listofDiscountProducts.setAdapter(fBListAdapter); //It's ListView on Activity
                }

无法在firebase数据库中添加新数据

 //adding data to firebase database
     public static void createNewDiscountPost(String nameProduct) {
            String key = refDiscount.push().getKey();
            DiscountPost discountPost = new DiscountPost(nameProduct);

            Map<String, Object> createNewDiscountPost = discountPost.toMap();

            Map<String, Object> childUpdates = new HashMap<>();
            childUpdates.put("/" + key, createNewDiscountPost);

            refDiscount.updateChildren(childUpdates);
        }

Answer 1

使listview适配器中的Sub Macro6() ' ' Macro6 Macro ' 'ActiveWindow.SmallScroll Down:=-12 Range("A1:A381").Select Selection.FormatConditions.Add Type:=xlTextString, String:="Totals:", TextOperator:=xlContains ' Selection.FormatConditions(Selection.FormatConditions.Count).SetFirstPriority ' With Selection.FormatConditions(1).Font ' .Color = -16383844 ' .TintAndShade = 0 ' End With With Selection.FormatConditions(1).Interior .PatternColorIndex = xlAutomatic .Color = 13551615 '16777215 ' .TintAndShade = 0 End With 'Selection.FormatConditions(1).StopIfTrue = False 'lastrow = Sheet4.Cells(Sheet4.Rows.Count, "A").End(xlUp).Row If Sheet1.Cells(9, 1).Interior.Color = 13551615 Then '16777215 MsgBox ("yes") Else MsgBox ("wrong") MsgBox (Sheet4.Cells(6, 1).Interior.Color) End If End Sub以相反的顺序返回您的项目

getitem

或者您可以尝试@Override public Object getItem(int position) { return super.getItem(super.getCount() - position - 1); }

有关如何订购数据的详细信息，请访问官方文档here 和this链接

使用Firebase数据库

1 个答案: