无法将回收站设置为从底部开始

Question

我正试图让我的recyclerview从底部开始

Make Recycler View show rows from bottom

根据这个答案，我都尝试过这两个

mMessageRecycler.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
mMessageRecycler.setAdapter(mMessageAdapter);

并且使用XML中的reverseLayout

app:stackFromEnd="true"
app:reverseLayout="true"

但是他们都不是让recyclerview从底部开始...仍然从顶部开始

这是我的整个布局：

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/challengeroom_recycler"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@null"
        app:layout_constraintBottom_toTopOf="@id/challengeroom_et_sendmessage"
        app:layout_constraintTop_toBottomOf="@+id/guideline1"
        app:layout_constraintRight_toRightOf="@+id/vertical_guideline_75percent"
        app:layout_constraintLeft_toLeftOf="parent"
        android:layout_marginStart="16dp"
        android:layout_marginBottom="16dp"
        app:stackFromEnd="true"
        app:reverseLayout="true"/>

Answer 1

请尝试此代码

LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);;
layoutManager.setStackFromEnd(true)
mMessageRecycler.setLayoutManager(layoutManager)