将所有记录的数据库字段加载到ListView Item Detail对象中

// 步骤1：连接到数据库并执行查询操作
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("SELECT * FROM mytable");

// 步骤2：创建ListView对象和适配器
ListView listView = findViewById(R.id.listView);
MyAdapter adapter = new MyAdapter();

// 步骤3：设置适配器
listView.setAdapter(adapter);

// 步骤4：创建自定义适配器类
class MyAdapter extends BaseAdapter {
    // 步骤5：重写相关方法
    @Override
    public int getCount() {
        return resultSet.size(); // 结果集的大小即为ListView的Item数量
    }

    @Override
    public Object getItem(int position) {
        return null; // 不需要实现
    }

    @Override
    public long getItemId(int position) {
        return 0; // 不需要实现
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // 步骤6：加载自定义布局文件
        if (convertView == null) {
            LayoutInflater inflater = LayoutInflater.from(getApplicationContext());
            convertView = inflater.inflate(R.layout.list_item_detail, parent, false);
        }

        // 步骤7：获取字段的视图对象
        TextView field1TextView = convertView.findViewById(R.id.field1TextView);
        TextView field2TextView = convertView.findViewById(R.id.field2TextView);
        // ...

        // 步骤8：设置字段的值
        resultSet.moveToPosition(position);
        String field1Value = resultSet.getString("field1");
        String field2Value = resultSet.getString("field2");
        // ...
        field1TextView.setText(field1Value);
        field2TextView.setText(field2Value);
        // ...

        // 步骤9：返回加载好字段的Item Detail对象的视图
        return convertView;
    }
}