Dfyjkt

I'm trying to build a BottomSheet that contains a RecyclerView in it. I used a NestedScrollView and set its behavior as "bottom_sheet_behavior". The first time the app run, it's popping up normally, but when I collapse the BottomSheet and select an item from the spinner, it popping up with a space below it.

This is just happening on android 8, not the other versions.
On the other hand, when I remove RecyclerView, it works normally.

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <LinearLayout
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">

 <com.toptoche.searchablespinnerlibrary.SearchableSpinner
 android:id="@+id/spinner"
 android:layout_width="200dp"
 android:layout_height="40dp"
 android:layout_gravity="center"
 android:layout_marginTop="200dp"
 android:background="#c9c5c5"
 android:elevation="8dp"
 android:entries="@array/seasons"
 android:layoutDirection="rtl"
 android:spinnerMode="dialog"
 android:textAlignment="center"
 android:textDirection="rtl" />

 </LinearLayout>

 <android.support.v4.widget.NestedScrollView
 android:id="@+id/bottom_sheet"
 android:layout_width="match_parent"
 android:layout_height="300dp"
 android:fillViewport="true"
 android:background="@color/colorPrimary"
 android:elevation="6dp"
 app:layout_behavior="@string/bottom_sheet_behavior">

 <android.support.v7.widget.RecyclerView
 android:id="@+id/activity_Recycler"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />

 </android.support.v4.widget.NestedScrollView>

</android.support.design.widget.CoordinatorLayout>

First run

After select an item from spinner

After a long effort finally found the problem. That was because of using this library ==> Searchable Spinner . I replaced it with simple spinner and it works fine!

Point:: Always use updated and supported libraries :|