我正在尝试在 Jetpack Compose 中创建一个项目列表,该列表会在基础数据发生更改时自动更新,但它不会更新,并且我无法在它最初组合后将项目添加到 LazyColumnFor。
private var latestMessages = mutableListOf<ChatMessage>()
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
return ComposeView(context = requireContext()).apply {
setContent {
LatestMessages(latestMessages)
}
}
}
@Composable
fun LatestMessages(messages: MutableList<ChatMessage>) {
Column {
LazyColumnFor(items = messages) { chatMessage ->
LatestMessageItem(chatMessage) {
// onclick
}
}
}
Box(alignment = Alignment.Center) {
Button(onClick = {
latestMessages.add(
ChatMessage(
"testId",
"testText2",
"testFromId2",
"testToId",
"timestamp",
0
)
)
}) {
}
}
}
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Box 中的 Button 只是为了测试添加一个项目。据我了解 LazyColumnFor …