DrawerLayout 内的 constraintLayout 内的 RecyclerView 不会滚动

Question

不知道还要添加什么。它只是不会滚动，我试了很多次。这是设置：

主活动：

...slimeDrawer.setOnClickListener { mainDrawer.openDrawer(ipsDrawer) }...

activity_main 中引用的“ipsDrawer”：

<include
    android:id="@+id/ipsDrawer"
    layout="@layout/drawer_ips"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="left"/>

drawer_ips.xml里面是不会滚动的recyclerView：

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/ipsRecycler"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:orientation="vertical"
    android:clickable="true"
    android:focusable="true"
    android:scrollbars="vertical"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="1.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/imageView17"
    app:layout_constraintVertical_bias="0.0" />

为回收站处理东西的类：

class Ips : Fragment() {
    companion object : LifecycleOwner {
    fun startIps(activity: Activity, ipsDrawer: View): Ips {
        val userDatabaseDao = UserDatabase.getInstance(activity.application).userDatabaseDao
        val ipsJob = Job()
        val ioScope = CoroutineScope(Dispatchers.IO + ipsJob)
        val stats = userDatabaseDao.getAllStats()
        val ipsAdapter = IpsAdapter()

        val ipsRecycler = ipsDrawer.findViewById<RecyclerView>(R.id.ipsRecycler)
        ipsRecycler.adapter = ipsAdapter
        (ipsRecycler.adapter as IpsAdapter).submitList(stats.value)

        stats.observe((activity as AppCompatActivity) as LifecycleOwner, Observer {
            ipsAdapter.submitList(it)
        } )

这是完整的activity_main和drawer_ips以及它不滚动的视频：

https://pastebin.com/QYp3i5jz

https://pastebin.com/b3mCC4Cd

https://streamable.com/4v4tlc

如果您需要更多信息，请告诉我

Answer 1

在activity_main中我把drawerLayout的最后一个位置移到了，现在它可以工作了