小编kej*_*lor的帖子

我编写了硬编码的 ToDo 元素列表，并制作了 2 个可组合函数来显示数据。

@Composable
fun TodoAppContent() {
val todos = remember { (DataProvider.listOfToDoEntries) }
Column(
    modifier = Modifier
        .fillMaxSize()
        .background(Color(0xff503d69))
) {
    LazyColumn(
        contentPadding = PaddingValues(horizontal = 16.dp, vertical = 8.dp),
        modifier = Modifier
            .weight(1f)
    ) {
        items(items = todos, itemContent = { CreateToDoListItem(todo = it) })
    }
    Button(
        onClick = {},
        modifier = Modifier
            .size(60.dp)
            .align(alignment = Alignment.CenterHorizontally),
        colors = ButtonDefaults.buttonColors(backgroundColor = Color(0xffc1b6d1)),
        shape = CircleShape
    ) {
        Text(text = "+")
    }
}

}

@Composable
fun CreateToDoListItem(todo: …

我已经按照其他用户的建议实现了导入，androidx.compose.runtime.*但我仍然无法使用observeAsState来显示任何值，例如Text(text = weather.main.temp.toString())可组合元素内部的值。

可组合：

@Composable
fun WeatherAppHomeScreen(weatherViewModel: WeatherViewModel) {
    val weather: Weather by weatherViewModel.myResponse.observeAsState()
    Text(text = weather.main.temp.toString())
}

数据类：

data class Weather(
    @SerializedName("base")
    val base: String,
    @SerializedName("clouds")
    val clouds: Clouds,
    @SerializedName("cod")
    val cod: Int,
    @SerializedName("coord")
    val coord: Coord,
    @SerializedName("dt")
    val dt: Int,
    @SerializedName("id")
    val id: Int,
    @SerializedName("main")
    val main: Main,
    @SerializedName("name")
    val name: String,
    @SerializedName("rain")
    val rain: Rain,
    @SerializedName("sys")
    val sys: Sys,
    @SerializedName("timezone")
    val timezone: Int,
    @SerializedName("visibility")
    val visibility: Int,
    @SerializedName("weather")
    val weather: List<WeatherX>,
    @SerializedName("wind")
    val …