Android's RecyclerView knowledge one

Step 1: Add a statement to the dependencies closure of the app/build.gradle file

compile 'com.android.support:recyclerview-v7:24.2.1'

Remember to click Sync Now in the upper right corner to synchronize

Step 2: Add the code of the RecyclerView control in activity_main.xml to create a sub-item class and create a layout file for the sub-item

Example:

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

The third step is to create an adapter class and create a ViewHolder class in the class to introduce the layout of children in this class

and specify the adapter class generic as <NewsAdapter.ViewHolder>

    class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {

    private List<News> mNewsList;

    class ViewHolder extends RecyclerView.ViewHolder {

        TextView newsTitleText;

        public ViewHolder(View view) { //Introduce the child item layout file
            super(view);
            newsTitleText = (TextView) view.findViewById(R.id.news_title);
        }

    }

    public NewsAdapter(List<News> newsList) { //Get child item data
        mNewsList = newsList;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { //Create corresponding child instances
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.news_item, parent, false);
       ViewHolder holder = new ViewHolder(view);
      
        return holder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) { //Assign the sub-item data
        News news = mNewsList.get(position);
        holder.newsTitleText.setText(news.getTitle());
    }

    @Override
    public int getItemCount() { //return the number of child items
        return mNewsList.size();
    }

}