Android 如何在jetpack compose中创建自定义rememberState

是的，你可以创建rememberModalBottomSheetState或rememberLazyListState这样的记忆功能.创建存储多种数据类型或MutableState的自定义记忆函数是很常见的.放Composables并不常见，至少到目前为止我还没有看到过，但它是可行的.

class MyState internal constructor() {
   var state1 by mutableStateOf(0)
   var state2 by mutableStateOf(0)
   var someValue = 0
}

内部构造函数是可选的，用于限制开发者只能创建remember个函数的实例.

// you can add params to pass to MyState instance or keys to reset remember
@Composable
fun rememberMyState(key1: Any?): MyState {
    return remember(key1) {
        MyState()
    }
}

如果您希望添加可组合组件，一种方法是

class MyState internal constructor() {
    var state1 by mutableStateOf(0)
    var state2 by mutableStateOf(0)
    var someValue = 0
    // this can also be SnapshoStateList to trigger recomposition when you add, remove or update list with new item instance
    val list = mutableListOf<@Composable () -> Unit>()
}

用法

val myState = rememberMyState(key1 = Unit)
myState.list.add {
    Box(
        modifier = Modifier
            .fillMaxWidth()
            .height(100.dp)
            .background(Color.Red)
    )
}

myState.list.add {
    Box(
        modifier = Modifier
            .fillMaxWidth()
            .height(100.dp)
            .background(Color.Yellow)
    )
}

Column(modifier = Modifier.fillMaxSize()) {
    myState.list.forEach{
        it.invoke()
    }
}