Flutter 中的 PaginatedDataTable 小部件：全面指南

import 'package:flutter/material.dart';
 
class PaginatedDataTableExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return PaginatedDataTable(
      header: Text('Expense table'),
      rowsPerPage: 2,
      availableRowsPerPage: [2, 4, 8],
      onRowsPerPageChanged: (rowsPerPage) {
        print('Rows per page changed: $rowsPerPage');
      },
      onPageChanged: (page) {
        print('Page changed: $page');
      },
      columns: <DataColumn>[
        DataColumn(label: Text('ID')),
        DataColumn(label: Text('Date')),
        DataColumn(label: Text('Description')),
        DataColumn(label: Text('Amount')),
      ],
      source: _ExpenseDataSource(context),
    );
  }
}
 
class _ExpenseDataSource extends DataTableSource {
  _ExpenseDataSource(this.context);
 
  final BuildContext context;
  int _selectedRowIndex;
 
  @override
  DataRow getRow(int index) {
    return DataRow(
      selected: index == _selectedRowIndex,
      onSelectChanged: (selected) {
        if (selected) {
          _selectedRowIndex = index;
        }
      },
      cells: <DataCell>[
        DataCell(Text('${index + 1}')),
        DataCell(Text('2021/10/01')),
        DataCell(Text('Expense ${index + 1}')),
        DataCell(Text('\$100')),
      ],
    );
  }
 
  @override
  int get rowCount => 5;
 
  @override
  bool get isRowCountApproximate => false;
}
 
void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(title: Text('PaginatedDataTable Example')),
      body: PaginatedDataTableExample(),
    ),
  ));
}

这个代码示例展示了如何在Flutter中创建一个带有分页功能的表格。它定义了一个PaginatedDataTableExample小部件，该小部件使用PaginatedDataTable来显示表格的标题、分页按钮、每页行数的选择以及表格的列。同时，它还演示了如何实现_ExpenseDataSource来提供表格的具体行数据，并处理行选择的逻辑。