如果你想在reyclerview的XML文件中设置网格布局，那么你可以把这两个放在recyclerview XML中。

app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
app:spanCount=numberOfItemsInSignleRow

如果你想从Java代码中设置网格布局，你可以这样写。

recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), numberOfItemsInSignleRow));

如果你想在reyclerview的XML文件中设置网格布局，那么你可以把这两个放在recyclerview XML中。

app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
app:spanCount=numberOfItemsInSignleRow

如果你想从Java代码中设置网格布局，你可以这样写。

recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), numberOfItemsInSignleRow));

在RecyclerView初始化中设置

recyclerView.setLayoutManager(new GridLayoutManager(this, 4));

你应该将你的RecyclerView LayoutManager设置为Gridlayout模式。当你想要设置你的RecyclerView LayoutManager时，只需更改你的代码:

recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), numberOfColumns));

虽然我喜欢并欣赏Suragch的回答，但我想留下一个提示，因为我发现编码适配器(MyRecyclerViewAdapter)来定义和公开监听器方法onItemClick并不是最好的方法，因为没有正确使用类封装。因此，我的建议是让适配器单独处理监听操作(这是他的目的!)，并将这些操作与使用适配器的活动(MainActivity)分开。这就是我如何设置Adapter类:

MyRecyclerViewAdapter.java

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

    private String[] mData = new String[0];
    private LayoutInflater mInflater;

    // Data is passed into the constructor
    public MyRecyclerViewAdapter(Context context, String[] data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    }

    // Inflates the cell layout from xml when needed
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_item, parent, false);
        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;
    }

    // Binds the data to the textview in each cell
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        String animal = mData[position];
        holder.myTextView.setText(animal);
    }

    // Total number of cells
    @Override
    public int getItemCount() {
        return mData.length;
    }

    // Stores and recycles views as they are scrolled off screen
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        public TextView myTextView;

        public ViewHolder(View itemView) {
            super(itemView);
            myTextView = (TextView) itemView.findViewById(R.id.info_text);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            onItemClick(view, getAdapterPosition());
        }
    }

    // Convenience method for getting data at click position
    public String getItem(int id) {
        return mData[id];
    }

    // Method that executes your code for the action received
    public void onItemClick(View view, int position) {
        Log.i("TAG", "You clicked number " + getItem(position).toString() + ", which is at cell position " + position);
    }
}

请注意，现在在MyRecyclerViewAdapter中定义的onItemClick方法是您想要为接收到的事件/操作编码任务的地方。

为了完成这个转换，只需要做一个小的更改:Activity不需要实现MyRecyclerViewAdapter。ItemClickListener，因为现在完全由适配器完成。这将是最后的修改:

MainActivity.java

public class MainActivity extends AppCompatActivity {

    MyRecyclerViewAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // data to populate the RecyclerView with
        String[] data = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48"};

        // set up the RecyclerView
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.rvNumbers);
        int numberOfColumns = 6;
        recyclerView.setLayoutManager(new GridLayoutManager(this, numberOfColumns));
        adapter = new MyRecyclerViewAdapter(this, data);
        adapter.setClickListener(this);
        recyclerView.setAdapter(adapter);
    }
}

这是一种仅使用XML的简单方法

spanCount表示列数

layoutManager使它成为网格或线性(垂直或水平)

<androidx.recyclerview.widget.RecyclerView
        android:id="@+id/personListRecyclerView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
        app:spanCount="2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />