Android 交错 Grdiv 全屏查看最后一个元素(如果独立)

Question

我有以下带有交错网格布局管理器的回收器 View :

我想像这样调整交错 GridView 的每个项目(如果最后一个元素是独立的，则为全屏):

Main.java:

   staggeredGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
    superEffectiveRecyclerView.setLayoutManager(staggeredGridLayoutManager);
    effectivenessSuperEffectiveAdapter = new EffectivenessRecyclerAdapter(this, effectivenessesSuperEffective);
    superEffectiveRecyclerView.setItemAnimator(new DefaultItemAnimator());
    superEffectiveRecyclerView.setAdapter(effectivenessSuperEffectiveAdapter);

list_item_type.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal">

<TextView
    android:id="@+id/effectiveness_effect"
    android:layout_width="33dp"
    android:layout_height="25dp"
    android:layout_marginTop="4dp"
    android:layout_marginBottom="4dp"
    android:gravity="center"
    android:text="@string/placeholder"
    android:textColor="#f000"
    android:textSize="14sp" />

<TextView
    android:id="@+id/effectiveness_name"
    android:layout_width="81dp"
    android:layout_height="25dp"
    android:layout_marginTop="4dp"
    android:layout_marginBottom="4dp"
    android:gravity="center"
    android:text="@string/placeholder"
    android:textColor="#f000"
    android:textSize="14sp" />
    </LinearLayout>

content_main.xml:

  <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/super_efective_recycler_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbars="vertical"  />

我怎样才能实现这个目标？

编辑:显然，设置:

     StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) holder.itemView.getLayoutParams();
    if(Objects.nonNull(layoutParams)){
        if (getItemCount() % 3 == 1 && position == getItemCount() - 1) {
            layoutParams.setFullSpan(true);
        }
    }

在 View 持有者中结果如下:

但是，这并不完全是我想要的，我只想要最后一个元素全屏

Answer 1

你可以试试这个

public final void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
    if (size % 2 == 1 && position == size - 1) {
        StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) viewHolder.itemView.getLayoutParams();
        layoutParams.setFullSpan(true);
    }
}

引用Setting span size of single row in StaggeredGridLayoutManager

编辑

如果你愿意，你也可以尝试gridlayout 当你将layoutManager设置为你的recyclerview时设置这个 size = 您在适配器中传递的列表的大小

 gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
        @Override
        public int getSpanSize(int position) {
            // 3 is the sum of items in one repeated section
            if (size%2==1&&position==size-1)
                return 1;
            else return 2;
            throw new IllegalStateException("internal error");
        }
    });