Android，模式底部对话框，高度

Question

我想用关闭按钮创建模态底部工作表对话框并给他自定义高度，我尝试使用dismiss（），但它不起作用

            override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
                super.onViewCreated(view, savedInstanceState)
                todayPromosList.adapter = homeFragmentAdapter
                todayPromosList.layoutManager =
                    LinearLayoutManager(context, RecyclerView.HORIZONTAL, false)

                toursList.adapter = homeFragmentAdapter
                toursList.layoutManager =
                    LinearLayoutManager(context, RecyclerView.HORIZONTAL, false)

    promotionList.adapter = homeFragmentAdapter
    promotionList.layoutManager =
        GridLayoutManager(context, 2)


    val bottomSheetDialog = BottomSheetDialog(context!!)
    bottomSheetDialog.setContentView(R.layout.dialog_search)
    bottomSheetDialog.setCancelable(false)

    home_search.setOnClickListener {
        bottomSheetDialog.show()
    }
    search_dialog_ic_close.setOnClickListener {
        bottomSheetDialog.setCancelable(true)
    }
}

}

Answer 1

You can set a bottomSheetDialogTheme in your Activity, 
overriding the bottomSheetStyle attribute's behavior_peekHeight:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
  <item name="bottomSheetDialogTheme">@style/AppBottomSheetDialogTheme</item>
</style>

<style name="AppBottomSheetDialogTheme"
       parent="Theme.Design.Light.BottomSheetDialog">
  <item name="bottomSheetStyle">@style/AppModalStyle</item>
</style>

<style name="AppModalStyle"
       parent="Widget.Design.BottomSheet.Modal">
  <item name="behavior_peekHeight">@dimen/custom_peek_height</item>
</style>