android 如何在Kotlin中为可组合函数创建一个注解来组合其他注解？

prdp8dxp 于 2023-03-28 发布在 Android

关注(0)|答案(1)|浏览(121)

我想创建一个名为***@MyComposablePreview***的注解，它由以下内容组成：

@Preview(
    uiMode = Configuration.UI_MODE_NIGHT_NO,
    showBackground = true,
    name = "Light Mode"
)
@Preview(
    uiMode = Configuration.UI_MODE_NIGHT_YES,
    showBackground = true,
    name = "Dark Mode"
)
@Composable

这样我就可以在一个可组合函数中调用它，像这样：

@MyComposablePreview
fun CardPreiview() {
    //Code of preview
}

有没有可能在jetpack compose中做到这一点？我尝试使用带注解的类，但我不能：/

android

来源：https://stackoverflow.com/questions/69056196/how-to-create-an-annotation-that-composes-other-annotations-in-kotlin-for-compos

1条答案

按热度按时间

iqjalb3h1#

您可以使用以下命令：

@Preview(
  name = "Light",
  group = "Light",
  showBackground = true,
  backgroundColor = 0xffEEEEEE,
  uiMode = UI_MODE_NIGHT_NO,
  fontScale = 1f
)
@Preview(
  name = "Dark",
  group = "Dark",
  showBackground = true,
  backgroundColor = 0xff444444,
  uiMode = UI_MODE_NIGHT_YES,
  fontScale = 1f
)
@Preview(
  name = "Light - Large font",
  group = "Light",
  showBackground = true,
  backgroundColor = 0xffEEEEEE,
  uiMode = UI_MODE_NIGHT_NO,
  fontScale = 2f
)
@Preview(
  name = "Dark - Large font",
  group = "Dark",
  showBackground = true,
  backgroundColor = 0xff444444,
  uiMode = UI_MODE_NIGHT_YES,
  fontScale = 2f
)
annotation class MyComposablePreview

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android 如何在Kotlin中为可组合函数创建一个注解来组合其他注解？

1条答案

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