如何在 Jetpack Compose 中使用小部件？

Question

我想用其中一些，但我开始与NumberPicker延伸LinearLayout ，因此不能只在取景当中实例化一个实例。 只是想要一个嵌入式数字微调器作为输入值的一种方式。

Answer 1

对于尚未为其创建特定组合的每个小部件，您现在可以在 Compose 中使用Android 视图。

@Composable
fun CustomView() {
    val selectedItem = remember { mutableStateOf(0) }

    // Adds view to Compose
    AndroidView(
        modifier = Modifier.fillMaxSize(), // Occupy the max size in the Compose UI tree
        factory = { context ->
            // Creates custom view
            CustomView(context).apply {
                // Sets up listeners for View -> Compose communication
                myView.setOnClickListener {
                    selectedItem.value = 1
                }
            }
        },
        update = { view ->
            // View's been inflated or state read in this block has been updated
            // Add logic here if necessary

            // As selectedItem is read here, AndroidView will recompose
            // whenever the state changes
            // Example of Compose -> View communication
            view.coordinator.selectedItem = selectedItem.value
        }
    )
}