Android开发--Fragment里面实现RecycleView瀑布流

先放一个效果图（效果图是用平板截图的，看着比例有点大），

这里我设置了ImageView的固定高度，你们写的时候可以换成

android:layout_height="wrap_content"

下面直接放代码：

1.fragment_find_recommend.xml，这里是在fragment布局文件里面添加一个RecycleView

2.recycle.xml，这里是为RecycleView添加内容，包括ImageView和TextView

3.写一个Recommend类

public class Recommend {
    private String name;
    private int ImageId;

    public Recommend(String name,int ImageId){
        this.name = name;
        this.ImageId = ImageId;
    }

    public int getImageId() {
        return ImageId;
    }

    public void setImageId(int imageId) {
        ImageId = imageId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

4.StaggeredGridAdapter.java写一个适配器

public class StaggeredGridAdapter extends RecyclerView.Adapter {

    private Context mContext;
    private List recommendList;

    public StaggeredGridAdapter(Context context, List recommendList) {
        this.mContext = context;
        this.recommendList = recommendList;
    }


    /**
     * 创建列表组件
     *
     * @param parent
     * @param viewType
     * @return
     */
    @NonNull
    @Override
    public StaggeredGridAdapter.RecommendViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycle, null);
        return new StaggeredGridAdapter.RecommendViewHolder(view);
    }

    /**
     * 绑定数据
     *
     * @param holder
     * @param position
     */
    @Override
    public void onBindViewHolder(@NonNull RecommendViewHolder holder, int position) {

//        holder.imageIdTv.setImageResource(recommendList.get(position).getImageId());
//        holder.nameTv.setText(recommendList.get(position).getName());
        holder.nameTv.setText(recommendList.get(position).getName());
        holder.imageIdTv.setImageResource(recommendList.get(position).getImageId());
    }

    @Override
    public int getItemCount() {
        return recommendList.size();
    }


    public class RecommendViewHolder extends RecyclerView.ViewHolder {
        TextView nameTv;
        ImageView imageIdTv;

        public RecommendViewHolder(View view) {
            super(view);
            this.nameTv = view.findViewById(R.id.recommend_item_text);
            this.imageIdTv = view.findViewById(R.id.recommend_item_image);
        }
    }
}

5.FindRecommendFragment.java

public class FindRecommendFragment extends Fragment {

    private RecyclerView recyclerView;
    private List recommendList=new ArrayList<>();
private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";


    private String mParam1;
    private String mParam2;

    public FindRecommendFragment() {
        // Required empty public constructor
    }


    public static FindRecommendFragment newInstance(String param1, String param2) {
        FindRecommendFragment fragment = new FindRecommendFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View root=inflater.inflate(R.layout.fragment_find_recommend, container, false);
        recyclerView=root.findViewById(R.id.recommend_recycle);
        //设置RecyclerView保持固定大小,这样可以优化RecyclerView的性能
        recyclerView.setHasFixedSize(true);
        initData();
        //设置瀑布流布局为2列，垂直方向滑动
        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
        StaggeredGridAdapter staggeredGridAdapter=new StaggeredGridAdapter(this.getActivity(),recommendList);
        recyclerView.setAdapter(staggeredGridAdapter);
        return root;
    }

    /**
     * 数据源
     */
    private void initData() {
        String[] names=new String[]{"唐诗宋词","京剧文化","传统美食","近代工艺","民间习俗","京剧文化","传统美食","近代工艺","民间习俗"};
        int[] ImageId=new int[]{R.drawable.pyx,R.drawable.z,R.drawable.hd1,R.drawable.lr,R.drawable.hd,R.drawable.kq,R.drawable.zz,R.drawable.lr,R.drawable.hd};
        for (int i=0;i

6.到这里基本上就结束了，如果有些报错，检查一下是不是没有在drawab文件里面放入图片。

效果图：

RecycleView里面的布局可以根据需要自己设置，这里我设置了ImageView的固定高度，你们写的时候可以换成android:layout_height="wrap_content"，就是左右图片参差不齐（类似于小红书）那种状态了。

以上就是实现Fragment+RecycleView瀑布流的方式，有什么问题可以直接评论区留言，我会尽量及时回复哒！