<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <android.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="98dp"
  android:layout_margin="8dp"
  android:background="@color/colorAccent">

  <TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="@style/TextAppearance.AppCompat.Large.Inverse"
    android:layout_centerInParent="true"
    tools:text="1" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="98dp"
  android:layout_margin="8dp"
  android:background="@color/colorAccent">

  <TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="@style/TextAppearance.AppCompat.Large"
    android:layout_centerInParent="true"
    tools:text="1" />

</RelativeLayout>

recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
// 指定列数为1
gridLayoutManager = new GridLayoutManager(this, COLUMN_ONE);
recyclerView.setLayoutManager(gridLayoutManager);  

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if (id == R.id.action_toggle) {
      if (gridLayoutManager.getSpanCount() == COLUMN_ONE) {
        gridLayoutManager.setSpanCount(COLUMN_THREE);
        item.setIcon(ContextCompat.getDrawable(this, R.drawable.ic_grid));
      } else {
        gridLayoutManager.setSpanCount(COLUMN_ONE);
        item.setIcon(ContextCompat.getDrawable(this, R.drawable.ic_list));
      }
      simpleAdapter.notifyItemRangeChanged(0, simpleAdapter.getItemCount());
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  public SimpleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView;
    if (viewType == VIEW_TYPE_LIST) {
      itemView = LayoutInflater.from(parent.getContext())
          .inflate(R.layout.item_list, parent, false);
    } else {
      itemView = LayoutInflater.from(parent.getContext())
          .inflate(R.layout.item_grid, parent, false);
    }
    return new SimpleViewHolder(itemView, viewType);
  }

  @Override
  public int getItemViewType(int position) {
    final int viewType;
    int column = layoutManager.getSpanCount();
    switch (column) {
      case COLUMN_ONE:
        viewType = VIEW_TYPE_LIST;
        break;
      case COLUMN_THREE:
        viewType = VIEW_TYPE_GRID;
        break;
      default:
        throw new RuntimeException("wtf?");
    }
    return viewType;