Smooth scroll and Fling with NestedScrollView,AppBarLayout and CoordinatorLayout

Question

I am working on an application where I'm using AppBarLayout with CollapsingToolbarLayout and NestedScrollView. I have successfully implemented this and it is working fine.

Now what i am trying to do is, that on fling(fast swipe up) on the Nestedscrollview it should scroll completely to top. Similarly, on fling(fast swipe down) towards the bottom of the screen, it must scroll all the way to the bottom smoothly. However now, it only gets stuck in between which makes it look ugly. I have tried many available solutions available here but nothing worked for me. My current setup is below.

    <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:zhy="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="RtlHardcoded">

<android.support.design.widget.AppBarLayout
    android:id="@+id/main.appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/main.collapsing"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <ImageView
            android:id="@+id/placeholder"
            android:layout_width="match_parent"
            android:layout_height="246dp"
            android:scaleType="fitXY"
            android:tint="#11000000"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.9" />


        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:padding="10dp">


            <FrameLayout
                android:id="@+id/back_frame"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="left|center_vertical"
                android:paddingBottom="5dp"
                android:paddingLeft="5dp"
                android:paddingRight="10dp"
                android:paddingTop="5dp">

                <ImageView
                    android:id="@+id/back_image"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:src="@drawable/abc_ic_ab_back_mtrl_am_alpha" />
            </FrameLayout>


            <FrameLayout
                android:id="@+id/frameLayoutheart"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_gravity="right|center_vertical"
                android:paddingBottom="5dp"
                android:paddingLeft="10dp"
                android:paddingRight="5dp"
                android:paddingTop="5dp">

                <ImageView
                    android:id="@+id/favbtnicon"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:src="@drawable/heart_profile" />
            </FrameLayout>


        </FrameLayout>

        <FrameLayout
            android:id="@+id/main.framelayout.title"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_gravity="bottom|center_horizontal"
            android:orientation="vertical"

            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.3">

            <LinearLayout
                android:id="@+id/main.linearlayout.title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:gravity="top"
                android:orientation="vertical">


                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"

                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/profileName"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="25dp"
                        android:inputType="textNoSuggestions"
                        android:singleLine="true"
                        android:text="Ankita arora"
                        android:textColor="@android:color/white"
                        android:textSize="25sp"
                        android:textStyle="bold" />


                    <ImageView
                        android:id="@+id/onlinestatus"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="29dp"
                        android:src="@drawable/online"
                        android:visibility="visible" />
                </LinearLayout>


                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center_horizontal"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/age"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:inputType="textCapSentences"
                        android:text="asdas"
                        android:textColor="@android:color/white"
                        android:textSize="13sp" />


                    <TextView
                        android:layout_width="4dp"
                        android:layout_height="4dp"
                        android:layout_gravity="center"

                        android:layout_marginLeft="4dp"
                        android:layout_marginRight="4dp"
                        android:background="@drawable/white_dot" />

                    <TextView
                        android:id="@+id/sex"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:inputType="textCapSentences"
                        android:text="asdas"
                        android:textColor="@android:color/white"
                        android:textSize="13sp" />


                    <TextView
                        android:id="@+id/loc_point"
                        android:layout_width="4dp"
                        android:layout_height="4dp"
                        android:layout_gravity="center"

                        android:layout_marginLeft="4dp"
                        android:layout_marginRight="4dp"
                        android:background="@drawable/white_dot" />


                    <TextView
                        android:id="@+id/loc"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:inputType="textCapSentences"
                        android:text="asdas"
                        android:textColor="@android:color/white"
                        android:textSize="13sp" />

                </LinearLayout>


            </LinearLayout>
        </FrameLayout>
    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>


<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scrollbars="none"
    app:behavior_overlapTop="10dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"

    >

    ------content--------------


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


<android.support.v7.widget.Toolbar
    android:id="@+id/main.toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/pinkColor"
    android:visibility="invisible"
    app:contentInsetEnd="0dp"
    app:contentInsetStart="0dp"
    app:layout_anchor="@id/main.framelayout.title"
    app:theme="@style/ThemeOverlay.AppCompat.Dark"
    app:title="">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/back"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:layout_gravity="left|center_vertical"
            android:layout_marginLeft="4dp"
            android:src="@drawable/abc_ic_ab_back_mtrl_am_alpha"
            android:visibility="invisible" />

        <Space
            android:layout_width="@dimen/image_final_width"
            android:layout_height="@dimen/image_final_width" />


        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginLeft="8dp"
            android:gravity="center"
            android:orientation="vertical">

            <TextView
                android:id="@+id/main.textview.title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_gravity="left"
                android:text="@string/quila_name2"
                android:textColor="@android:color/white"
                android:textSize="20sp" />

            <TextView
                android:id="@+id/status"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="left"
                android:layout_marginTop="-4dp"
                android:text="@string/quila_name2"
                android:textColor="@android:color/white"
                android:textSize="12sp" />


        </LinearLayout>

    </LinearLayout>
</android.support.v7.widget.Toolbar>

<de.hdodenhof.circleimageview.CircleImageView
    android:id="@+id/profileimg"
    android:layout_width="@dimen/image_width"
    android:layout_height="@dimen/image_width"
    android:layout_gravity="center_horizontal"

    app:border_color="@android:color/white"
    app:border_width="2dp"
    app:finalHeight="@dimen/image_final_width"
    app:finalYPosition="2dp"
    app:layout_behavior="com.sdl.apps.yaarri.views.AvatarImageBehavior"
    app:startHeight="2dp"
    app:startToolbarPosition="2dp"
    app:startXPosition="2dp" />

One of the most accepted answers, shown below did not work for me either.

Unable to scroll AppBarLayout and collapsing toolbar with NestedScrollView smoothly

Answer 1

When i was burning my midnight oil this library came like batman

https://github.com/henrytao-me/smooth-app-bar-layout

According to which the behavior can be improved by following these steps:

1.Change

 android.support.design.widget.AppBarLayout

to

 me.henrytao.smoothappbarlayout.SmoothAppBarLayout and set android:id

2.Remove

 app:layout_behavior="@string/appbar_scrolling_view_behavior"

3.Add header to your NestedScrollView or RecyclerView

Which actually made it to work like charm.

The final setup looks like

                <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">

                  <android.support.v4.widget.NestedScrollView
                    android:id="@+id/nested_scroll_view"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">

                    <LinearLayout
                      android:layout_width="match_parent"
                      android:layout_height="wrap_content"
                      android:orientation="vertical"
                      android:paddingLeft="16dp"
                      android:paddingRight="16dp"
                      android:paddingTop="@dimen/app_bar_height">

                      <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="16dp"
                        android:layout_marginTop="16dp"
                        android:text="@string/text_short" />

                      <TextView
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="16dp"
                        android:text="@string/text_long" />
                    </LinearLayout>
                  </android.support.v4.widget.NestedScrollView>

                  <me.henrytao.smoothappbarlayout.SmoothAppBarLayout
                    android:id="@+id/smooth_app_bar_layout"
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/app_bar_height">

                    <android.support.design.widget.CollapsingToolbarLayout
                      android:id="@+id/collapsing_toolbar_layout"
                      android:layout_width="match_parent"
                      android:layout_height="match_parent"
                      app:layout_scrollFlags="scroll|exitUntilCollapsed">

                      <android.support.v7.widget.Toolbar
                        android:id="@+id/toolbar"
                        app:layout_collapseMode="pin"
                        app:navigationIcon="@drawable/ic_menu_arrow_back"
                        style="@style/AppStyle.MdToolbar" />
                    </android.support.design.widget.CollapsingToolbarLayout>
                  </me.henrytao.smoothappbarlayout.SmoothAppBarLayout>
                </android.support.design.widget.CoordinatorLayout> 

If you still face any issue while implementing this ask here i would love to help and mark this up if this answer helps.