更喜欢 const 文字作为 android studio 中 @immutable 类的构造函数的参数

Question

在下面的代码中，我收到“更喜欢 const 文字作为 @immutable 类上构造函数的参数”的检查警告，这很烦人。我应该怎么做才能让它消失？

IDE 的截图

Container(
        margin: const EdgeInsets.all(20),
        width: double.infinity,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TextField(
              decoration: InputDecoration(
                  border: OutlineInputBorder(),
                  hintText: 'Enter a search term'),
            ),
            Text("these are the search results", textAlign: TextAlign.left),
          ],
        ),
      )

我试图让每个构造函数都调用“const”，但没有成功。

Container(
        margin: const EdgeInsets.all(20),
        width: double.infinity,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const TextField(
              decoration: const InputDecoration(
                  border: const OutlineInputBorder(),
                  hintText: 'Enter a search term'),
            ),
            const Text("these are the search results", textAlign: TextAlign.left),
          ],
        ),
      ),

Answer 1

只需将列表标记为 const：

Container(
    margin: const EdgeInsets.all(20),
    width: double.infinity,
    child: Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: const [
        TextField(
          decoration: InputDecoration(
              border: OutlineInputBorder(),
              hintText: 'Enter a search term'),
        ),
        Text("these are the search results", textAlign: TextAlign.left),
      ],
    ),
  ),