android - 以沉浸式模式显示 BottomSheetDialogFragment

Question

我想在沉浸式模式下显示 BottomSheetDialogFragment。最初导航和状态栏会在显示对话框时显示，但我可以使用下面的代码对其进行排序。但是，当显示或关闭对话框时，导航栏会瞬间闪烁。有没有一种方法可以让 BottomSheetDialogFragment 完全身临其境，而导航栏不会在显示和关闭时闪烁？

abstract class ImmersiveBottomSheetDialogFragment<T : ViewDataBinding> : BottomSheetDialogFragment() {

    protected lateinit var binding: T

    private val systemUiVisibility: Int = (View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
            or View.SYSTEM_UI_FLAG_FULLSCREEN
            or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY)

    fun showImmersive(
        fragmentManager: FragmentManager,
        tag: String,
        tapOutsideEnabled: Boolean = false
    ) {
        show(fragmentManager, tag)
        fragmentManager.executePendingTransactions()
        dialog?.let { dialog ->
            dialog.setCanceledOnTouchOutside(tapOutsideEnabled)
            dialog.window?.let { window ->
                window.decorView.systemUiVisibility = systemUiVisibility
                window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE)
            }
        }
    }
}

Answer 1

添加这个:

override fun setupDialog(dialog: Dialog?, style: Int) {
    super.setupDialog(dialog, style)
    dialog?.window?.setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE)
}

( from )

同时添加:

override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    var viewParent = view
    while (viewParent is View) {
        viewParent.fitsSystemWindows = false
        viewParent.setOnApplyWindowInsetsListener { _, insets -> insets }
        viewParent = viewParent.parent as View?
    }
}

这是做什么的？ DialogFragment#onActivityCreated() 调用 Dialog#setContentView()，它将对话框的 View 包装在私有(private)的“wrapInBottomSheet”中。为了设置这些包装器 View 的正确标志，我们希望在它们被包装后设置标志，例如在 super.onActivityCreated() 之后

同时观看 this talk有关 fitsSystemWindows 和窗口插图的信息。