Android RecyclerView Tutorial: Step-by-Step Guide

RecyclerView is a recommended official Android widget for displaying large amounts of data in a list, offering better performance and scalability compared to ListView. Here are the simple steps to use RecyclerView:

1. Add a RecyclerView widget to the layout file.

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

1. Create a custom Adapter that inherits from RecyclerView.Adapter and implement the necessary methods.

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.ViewHolder> {
    
    private List<String> mData;

    public CustomAdapter(List<String> data) {
        this.mData = data;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.bind(mData.get(position));
    }

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

    public class ViewHolder extends RecyclerView.ViewHolder {
        
        private TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.textView);
        }

        public void bind(String data) {
            textView.setText(data);
        }
    }
}

1. Create a layout file for displaying the style of each item (item_layout.xml):

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/textView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

1. Initialize RecyclerView and set the Adapter in Activity or Fragment.

RecyclerView recyclerView = findViewById(R.id.recyclerView);
List<String> data = new ArrayList<>();
// 添加数据到data
CustomAdapter adapter = new CustomAdapter(data);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));

This completes a simple example of using RecyclerView. In actual development, you can customize the Adapter and layout files according to your needs to achieve a more complex and rich list display effect.