android - Jetpack 组成 : how to force a dropdownmenu to be anchored underneath its parent?

Question

我目前正在使用 dropdownmenu 在我的应用程序中选择众多选项之一。问题是，一旦其中包含许多元素，下拉菜单就会扩展到最初锚定的位置之上(见附图)。我怎样才能像第一张图片那样强制下拉菜单固定在按钮的底部？谢谢!

what i want (only works with few items in the list)

the problem (occurs when there is lots of items in the list)

编辑:这里是相关代码:

Box(modifier = Modifier.fillMaxWidth()) { // box for dropdown menu
                Button(
                    modifier = Modifier.fillMaxWidth(),
                    onClick = { showCategories = true }
                ) {
                    Icon(Icons.Default.Favorite, null)
                    Text("${currentCategory.name}")
                    Icon(
                        painter = painterResource(id = R.drawable.ic_baseline_expand_more_24),
                        contentDescription = "expand more"
                    )
                }
                DropdownMenu(
                    expanded = showCategories,
                    onDismissRequest = {
                        showCategories = false
                    }
                ) {
                    categories.forEach {
                        DropdownMenuItem(
                            onClick = {
                                onCategoryChangeRequest(it)
                                showCategories = false
                            }
                        ) {
                            Text(it.name)
                        }
                    }
                }
            }

Answer 1

您可以为您的 DropdownMenu 分配最大尺寸。

DropdownMenu(
    modifier = Modifier.requiredSizeIn(maxHeight = 200.dp),
    ...
)

它对我有用...