用于文本选择的浮动工具栏 Jetpack Compose

如何在 Jetpack Compose 中将选定文本的菜单自定义到 TextField？我的意思是这样的：

在官方文档或互联网上没有找到任何有关如何使用 Jetpack Compose 执行此操作的信息。

您可以提供定制TextToolbar in the LocalTextToolbar。在那里，在showMenu方法，你必须startActionMode就像您在旧版 Android 中所做的那样。CustomTextToolbar:

override fun showMenu(
    rect: Rect,

    onCopyRequested: (() -> Unit)?,
    onPasteRequested: (() -> Unit)?,
    onCutRequested: (() -> Unit)?,
    onSelectAllRequested: (() -> Unit)?

// Before 1.2.0 ActionCallback has to be defined like this:
// typealias ActionCallback = () -> Unit
//
//  onCopyRequested: ActionCallback?,
//  onPasteRequested: ActionCallback?,
//  onCutRequested: ActionCallback?,
//  onSelectAllRequested: ActionCallback?
) {
    println("showMenu")
    view.startActionMode(TextActionModeCallback())
}

class TextActionModeCallback(
) : ActionMode.Callback {
    override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
        println("onActionItemClicked $mode $item")
        return true
    }

    override fun onCreateActionMode(mode: ActionMode?, menu: Menu?): Boolean {
        println("onActionItemClicked $mode $menu")
        return false
    }

    override fun onPrepareActionMode(mode: ActionMode?, menu: Menu?): Boolean {
        println("onActionItemClicked $mode $menu")
        return true
    }

    override fun onDestroyActionMode(mode: ActionMode?) {
        println("onActionItemClicked $mode")
    }
}

作为如何实现它的参考，请查看 compose 源代码：Android文本工具栏 https://github.com/androidx/androidx/blob/3167373c96f8ab86f2d102b0e520cf185cf52b46/compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/platform/AndroidTextToolbar.android.kt#L32 and 文本操作模式回调 https://github.com/androidx/androidx/blob/3167373c96f8ab86f2d102b0e520cf185cf52b46/compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/platform/actionmodecallback/TextActionModeCallback.android.kt#L30

然后你可以像这样使用它：

CompositionLocalProvider(
    LocalTextToolbar provides CustomTextToolbar(LocalView.current)
) {
    var text by remember { mutableStateOf("") }
    TextField(value = text, onValueChange = { text = it })
}

要使此操作适用于整个应用程序，您需要在可组合树的顶部执行此操作，例如在setContent.

附注我必须定义ActionCallback，因为它是内部的 compose。我相信这是一个错误，所以我创建了这个问题 https://issuetracker.google.com/issues/197950089。它是fixed https://developer.android.com/jetpack/androidx/releases/compose-ui#1.2.0-alpha05在撰写中1.2.0-alpha05.