RecycleView leaves empty space at the bottom because of toolbar

Question

Update:

• Actual issue is with CoordinatorLayout not with RecycleView.
• Instead of using RecycleView I tried TextView inside ScrollView and it is the same issue.
• Something is not aligned if you have Toolbar as ActionBar and using CoordinatorLayout with another ToolBar as Sticky Header with scrolling element at bottom

Original:

I'm in process of develop a view which needed Sticky header implementation with recycle view at bottom. I have used Coordinator layout support as describe here.

What is working:

• Sticky View on scroll list.
  • Toolbar using layout_collapseMode = pin & CollapsingToolbarLayout using layout_scrollFlags = scroll|exitUntilCollapsed|snap property.
  • Recycle view with behaviour app:layout_behavior="@string/appbar_scrolling_view_behavior"

What is issue:

• Recycle view leaving margin at bottom, it has same size as Toolbar I'm using to sticky view.
• Recycle view last item does not display, it need extra bottom_margin as size of sticky tool bar view.

Observation:

• If I fill recycle instant then it work. But if notify it with some delay then it causing issue.
• Update. In another trial and run**, instead of using Recycle I put an TextView inside the NestedScrollView.(PFA) (not updated in layout here)
  • Here I have added text from xml and after delay of 2 second just append some more text and it's same result.
  • It's layout that take bottom margin again. So nothing specific related to Recycle view, it seems some issue with CoordinatorLayout.

I have tried with multiple solution available here, here, but none of working.

PFA, current output.

Update PFA, experiment with text view with delay.

Here is the layout file.

<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/summaryAppBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/main.collapsing"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="256dp"
                android:background="@drawable/fable_1"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.3" />

            <!-- This is sticky header-->
            <androidx.appcompat.widget.Toolbar
                android:id="@+id/summaryToolBar"
                android:layout_width="match_parent"
                android:layout_height="72dp"
                android:layout_gravity="center"
                android:background="@android:color/white"
                android:padding="@dimen/common_layout_margin"
                android:visibility="visible"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textSize="24sp"
                        android:text="Name" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="right"
                        android:textSize="24sp"
                        android:text="Offer"/>

                </FrameLayout>

            </androidx.appcompat.widget.Toolbar>

        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>

   <!-- Bottom margin if I do't use then it does not display last child item. Wired but true in this case-->

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipToPadding="false"
        android:visibility="visible"
        android:layout_marginBottom="72dp"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:listItem="@layout/item_dessert" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

Answer 1

Can you please try the below layout file. I have tested it and it works fine. You can remove the marginButtom from the recyclerview as well.

xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">


<androidx.coordinatorlayout.widget.CoordinatorLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">

<com.google.android.material.appbar.AppBarLayout
    android:id="@+id/summaryAppBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <com.google.android.material.appbar.CollapsingToolbarLayout
        android:id="@+id/main.collapsing"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="256dp"
            android:background="@drawable/fable_1"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.3" />

        <!-- This is sticky header-->
        <androidx.appcompat.widget.Toolbar
            android:id="@+id/summaryToolBar"
            android:layout_width="match_parent"
            android:layout_height="72dp"
            android:layout_gravity="center"
            android:background="@android:color/white"
            android:padding="@dimen/common_layout_margin"
            android:visibility="visible"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textSize="24sp"
                    android:text="Name" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="right"
                    android:textSize="24sp"
                    android:text="Offer"/>

            </FrameLayout>

        </androidx.appcompat.widget.Toolbar>

        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>



    <androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipToPadding="false"
    android:visibility="visible"
    android:layout_marginBottom="72dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:listItem="@layout/item_dessert" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>
</RelativeLayout>