RecyclerView smoothScrollToPosition() 不适用于 nestedScrollView。每当创建片段时，我都想滚动到底部

Question

我有一个嵌套的滚动视图，里面有一个图像视图和一个回收器视图。每当调用 onResume() 片段方法时，我希望回收器视图一直滚动到底部。当前行为是它打开屏幕作为正常屏幕并且根本不滚动。

我尝试了各种解决方案，但没有任何效果。

这是布局和片段的代码class。请帮我。什么都没有发生。

<androidx.core.widget.NestedScrollView
            android:id="@+id/nestedScrollView"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:fillViewport="true"
            android:focusableInTouchMode="true"
            android:fitsSystemWindows="true"
            app:layout_constraintBottom_toTopOf="@+id/btnCall"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.0"
            app:layout_constraintVertical_chainStyle="spread_inside">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/constraintLayout"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:descendantFocusability="blocksDescendants"
                app:layout_constraintBottom_toTopOf="@+id/btnYouGave"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintVertical_bias="0.0"
                app:layout_constraintVertical_chainStyle="spread_inside">

                <de.hdodenhof.circleimageview.CircleImageView
                    android:id="@+id/ivTransactionProfileImage"
                    android:layout_width="102dp"
                    android:layout_height="102dp"
                    android:layout_marginTop="16dp"
                    android:src="@drawable/ic_panda"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />

                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recyclerViewTrnsaction"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="16dp"
                    app:layout_constraintVertical_bias="0.0"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/ivTransactionProfileImage" />

            </androidx.constraintlayout.widget.ConstraintLayout>

        </androidx.core.widget.NestedScrollView>





override fun onResume() {
    super.onResume()
    mainActivity.supportActionBar?.title = args.name
    recyclerViewTrnsaction.layoutManager = LinearLayoutManager(activity)

    launch {
        context?.let {
            val transactions = getAllTransactions(args.id)
            recyclerViewTrnsaction.adapter = TransactionAdapter(transactions)
            nestedScrollView.smoothScrollTo(0, nestedScrollView.height)
            recyclerViewTrnsaction.smoothScrollToPosition(recyclerViewTrnsaction.adapter!!.itemCount)
        }
    }
}

Answer 1

尝试使用此滚动 NestedScrollView 而不是 RecyclerView。

将平滑滚动代码替换为

nestedScrollView.post {
   nestedScrollView.fullScroll(View.FOCUS_DOWN)
 }

RecyclerView smoothScrollToPosition() 不适用于 nestedScrollView。每当创建片段时，我都想滚动到底部

RecyclerView smoothScrollToPosition() is not working with nestedScrollView. I want to scroll to the bottom whenever the fragment is created

android

smooth-scrolling

kotlin

android-recyclerview

android-nestedscrollview