CODEWITHSUNDEEP
androidandroid-recyclerviewandroid-adapterandroid-collapsingtoolbarlayout
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Reputation: 4784

CollapsingToolbarLayout collapses inconsistently on RecyclerView scroll

When using a CollapsingToolBarLayout with a RecyclerView, I found that the toolbar collapsed inconsistently when scrolling. I could scroll about halfway through the recyclerview before anything collapsed at all, and then it would collapse in fits and starts. The behavior wasn't always consistent - sometimes it would collapse more than others. By the time I scrolled to the bottom, however, it was always fully collapsed. My XML looked like the following:

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true" >
        <com.google.android.material.appbar.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fitsSystemWindows="true">
            <com.google.android.material.appbar.CollapsingToolbarLayout
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:fitsSystemWindows="true"
                app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed" >
                <com.google.android.material.appbar.MaterialToolbar
                    android:layout_height="?attr/actionBarSize"
                    android:layout_width="match_parent"
                    app:layout_collapseMode="pin" />
            </com.google.android.material.appbar.CollapsingToolbarLayout>
        </com.google.android.material.appbar.AppBarLayout>
        <androidx.recyclerview.widget.RecyclerView
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
    </androidx.coordinatorlayout.widget.CoordinatorLayout>

Upvotes: 1

Views: 771

Answers (1)

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Reputation: 4784

It turned out that the ultimate issue was having a second RecyclerView within some of the view holders of the first. As per this answer, setting setNestedScrollingEnabled(false) on the inner RecyclerView caused things to behave as expected.

Upvotes: 3

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