Android 来自模态BottomSheetFragment的BottomSheetCallback

如果使用模态BottomSheetFragment，如何添加BottomSheetBehavior

var bottomSheetBehaviorCallback = 
    object : BottomSheetBehavior.BottomSheetCallback() {

        override fun onSlide(bottomSheet: View, slideOffset: Float) {
            Log.d(Constants.LOG_INFO, "on slide")
        }

        override fun onStateChanged(bottomSheet: View, newState: Int) {
            Log.d(Constants.LOG_INFO, "onStateChanged")
        }
    }

val detailView = StationDetailFragment.newInstance(selectedStationID, "")
detailView.show(fragmentManager, "detailView")

此时不创建视图

我更改了代码并添加了覆盖设置对话框。但我还是不能上班

override fun setupDialog(dialog: Dialog?, style: Int) {

    val contentView = View.inflate(context, R.layout.fragment_station_detail, null)
    dialog!!.setContentView(contentView)

    val layoutParams = (contentView.parent as View).layoutParams as CoordinatorLayout.LayoutParams

    val behavior = layoutParams.behavior

    if (behavior != null && behavior is BottomSheetBehavior<*>) {
      behavior.setBottomSheetCallback(mBottomSheetBehaviorCallback)
    }
}

覆盖对话框（对话框：dialog？，样式：Int）{
val contentView=View.inflate（上下文，R.layout.fragment\u station\u detail，null）
对话框！！.setContentView（contentView）
val layoutParams=（contentView.parent作为视图）。layoutParams作为CoordinatorLayout.layoutParams
val behavior=layoutParams.behavior
if（behavior！=null&&behavior为behavior）{
行为.setBottomSheetCallback（mBottomSheetBehaviorCallback）
}
}

您可以在setUpDialog方法中设置您的行为

 @Override
        public void setupDialog(Dialog dialog, int style) {
            View contentView = View.inflate(getContext(), R.layout.custom_filter_bottom_sheet, null);
            dialog.setContentView(contentView);
            CoordinatorLayout.LayoutParams layoutParams =
                    (CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams();
            CoordinatorLayout.Behavior behavior = layoutParams.getBehavior();
            if (behavior != null && behavior instanceof BottomSheetBehavior) {
                ((BottomSheetBehavior) behavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
            }

        }

以及定义回调

 private BottomSheetBehavior.BottomSheetCallback mBottomSheetBehaviorCallback = new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_HIDDEN) {
                dismiss();
            }
        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
        }
    };

---

如果您对创建底部工作表行为感兴趣，请遵循以下步骤

您已经按照下面链接中的定义在代码中设置了BottomSheetBehavior

---

谢谢大家！对我来说，最好的解决方案是将我的底部工作表作为持久的底部工作表添加到activity_main.xml中

下面的解释对我很有帮助

最后，我找到了使用kotlin的Modal底板的解决方案

  override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {


    val dialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog

    dialog.setOnShowListener { dialog ->
        val d = dialog as BottomSheetDialog

        val bottomSheet = d.findViewById<View>(android.support.design.R.id.design_bottom_sheet) as FrameLayout?
        bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet!!)
        bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED
    }

    return dialog

}

override fun onCreateDialog（savedInstanceState:Bundle？）：Dialog{
val dialog=super.onCreateDialog（savedInstanceState）作为BottomSheetDialog
dialog.setOnShowListener{dialog->
val d=对话框作为底部对话框
val bottomSheet=d.findviewbyd（android.support.design.R.id.design\u bottom\u sheet）作为FrameLayout？
bottomSheetBehavior=bottomSheetBehavior.from（bottomSheet！！）
bottomSheetBehavior.state=bottomSheetBehavior.state\u已展开
}
返回对话框
}

---

我的问题是我试图使用我的协调器布局。但是对于模式底部表单，您必须使用android.support.design.R.id.design\u bottom\u sheet

您的意思是BottomSheetFragment？是的。。谢谢，我改了，我没收到回电<代码>代码覆盖有趣的设置对话框（对话框：dialog？，样式：Int）{val contentView=View.inflate（context，R.layout.fragment\u station\u detail，null）对话框！！.setContentView（contentView）val layoutParams=（contentView.parent作为视图）.layoutParams as CoordinatorLayout.layoutParams val behavior=layoutParams.behavior如果（behavior！=null&&behavior是BottomSheetBehavior）{behavior.setBottomSheetCallback（mBottomSheetBehaviorCallback）}

code

您的意思是setUpDialog方法不调用吗？更新您的代码您所做的将整个代码保存在BottomSheetFragment中，您如何从其他活动调用此片段