Android NestedScrollView's child views ignoring first click

Question

I am using Coordinator layout along with NestedScrollView in my fragment for the Collapsing Toolbar animation. I am adding views dynamically to my Nested Scrollview container. I have implemented onClickListener on the views inside NestedScrollView, but the first click on any view is always ignored. When I tap for a second time or more than it works. The code for my XML is as follows:

<?xml version="1.0" encoding="utf-8"?>
<!--
~ Copyright (C) 2015 The Android Open Source Project
~
~ Licensed under the Apache License, Version 2.0 (the "License");
~ you may not use this file except in compliance with the License.
~ You may obtain a copy of the License at
~
~      http://www.apache.org/licenses/LICENSE-2.0
~
~ Unless required by applicable law or agreed to in writing, software
~ distributed under the License is distributed on an "AS IS" BASIS,
~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
~ See the License for the specific language governing permissions and
~ limitations under the License.
-->

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main_content"
    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"
    android:fitsSystemWindows="true">

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fitsSystemWindows="true">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:collapsedTitleTextAppearance="@style/toolBarTitleStyle"
        app:contentScrim="@color/primary"
        app:expandedTitleMarginBottom="@dimen/dimen_21dp"
        app:expandedTitleMarginStart="@dimen/dimen_13dp"
        app:expandedTitleTextAppearance="@style/ExpandedToolBarTextTheme"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            android:src="@drawable/locality_bg"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.2"/>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"/>

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

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

<android.support.v4.widget.NestedScrollView
    android:id="@+id/scroll_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <LinearLayout
        android:id="@+id/base_view_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/black_20pc"
        android:orientation="vertical">

    </LinearLayout>

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

<com.locon.housing.views.RobotoMediumButton
    android:id="@+id/view_listings"
    android:layout_width="match_parent"
    android:layout_height="@dimen/dimen_56dp"
    android:layout_gravity="bottom"
    android:background="@color/vida_loca"
    android:gravity="center"
    android:text="@string/alerts_view_listings"
    android:textColor="@color/white"
    android:textSize="@dimen/fontsize_medium"/>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/dimen_16dp"
    android:clickable="true"
    android:src="@drawable/ic_action_new"/>

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

It seems like NestedScrollView is intercepting the touch event and not passing to a child for the first time. How do I fix this issue?

Answer 1

I have the same bug. After upgrading support library version to 27.0.1 bug has been disappeared.

See: https://developer.android.com/topic/libraries/support-library/revisions.html#27-0-1

After a user scrolls, they cannot click on an item in a RecyclerView. (AOSP issue 66996774)

See the same question: Android - the item inside RecyclerView can't be clicked after scroll

Answer 2

If u using androidX: upgrade to 1.1.0 version of recyclerview fixed that bug

implementation "androidx.recyclerview:recyclerview:1.1.0"