RecyclerView（一）基本运用

最新推荐文章于 2025-10-05 09:08:12 发布

原创最新推荐文章于 2025-10-05 09:08:12 发布 · 117 阅读

0 ·

CC 4.0 BY-SA版权

Android基础专栏收录该内容

65 篇文章

订阅专栏

本文详细介绍如何在Android项目中从零开始使用RecyclerView。首先在build.gradle中添加必要的库依赖，然后在XML布局文件中初始化RecyclerView组件。接着创建自定义适配器，并在Activity中设置LayoutManager和Adapter，最后运行应用完成RecyclerView的集成。

一.build.gradle文件中加载RecyclerView库

dependencies {
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'

}

二.xml文件中初始化RecyclerView

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


  </android.support.v7.widget.RecyclerView>

三.设置RecyclerView的适配器

  class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {

        private final Context context;
        private final List<Integer> datas;

        MyAdapter(Context context, List<Integer> datas) {
            this.context = context;
            this.datas = datas;
        }

        @NonNull
        @Override
        public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
            View view = LayoutInflater.from(context).inflate(R.layout.item_data, viewGroup, false);

            return new MyViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int position) {

            TextView title = myViewHolder.itemView.findViewById(R.id.tv_title);
            title.setText("第" + position + "个Item");
        }

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

    class MyViewHolder extends RecyclerView.ViewHolder {

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
        }
    }

四.初始化RecyclerView

  mRecyclerView = findViewById(R.id.recyclerView);
        LinearLayoutManager linearLayoutManager =
                new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        mRecyclerView.setLayoutManager(linearLayoutManager);
        MyAdapter myAdapter = new MyAdapter(this, datas);
        mRecyclerView.setAdapter(myAdapter);

五.运行，完成！！

六.知识点

1. LinearLayoutManager(Context context, int orientation, boolean reverseLayout) ，orientation可为LinearLayoutManager.VERTICAL和LinearLayoutManager.HORIZONTAL，reverseLayout如果是true，则item布局是倒序排序

2. StaggeredGridLayoutManager(int spanCount, int orientation) ，spanCount指一屏占多少格，该布局需要在onBindViewHolder中动态改变布局大小

3.GridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout)