Android supports the performance optimization and best practice of the RecyclerView framework

Android supports the performance optimization and best practice of the RecyclerView framework RecyclerView is a commonly used control in Android development, which provides a highly flexible list display function.However, with the increase of list data, the performance problems of RecyclerView may become prominent.Optimizing the performance of RecyclerView is essential for improving the user experience.This article will introduce some common performance optimization strategies and best practices. 1. Use ViewHolder mode: The use of ViewHolder mode in the adapter of RecyclerView is one of the key to improving performance.The ViewHolder mode reduces memory overhead by reuse the created View object and reduces the analysis time of the layout.Below is an example code of ViewHolder: public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { public static class ViewHolder extends RecyclerView.ViewHolder { // Binding view control TextView textView; public ViewHolder(View itemView) { super(itemView); // Initialize view control textView = itemView.findViewById(R.id.textView); } } @Override public MyAdapter.ViewHolder onCreateViewHolder(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(MyAdapter.ViewHolder holder, int position) { // Set data to view control holder.textView.setText("Item " + position); } @Override public int getItemCount() { return 100; } } 2. Use DiffUtil to change the dataset: When the data set of RecyclerView is updated, you can use DiffUtil to calculate and update the difference part, instead of re -bound the entire data set.This can greatly reduce invalid re -painting and layout calculations, thereby improving performance.Below is an example code using Diffutil: List<String> oldData = new ArrayList<>(); List<String> newData = new ArrayList<>(); DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new MyDiffUtilCallback(oldData, newData)); diffResult.dispatchUpdatesTo(adapter); 3. Reasonable use of ItemDecoration: By customized itemDecoraTion, you can add septum and decoration effects to the list item.However, for large lists, excessive itemDecorab may lead to performance problems.Therefore, it is recommended to use ItemDecoration only when needed, and avoid expensive calculations at the Measure stage. 4. Use animation effect carefully: animation effect can enhance user experience, but excessive use of animation may also cause stuttering and performance problems.When achieving animation effects, pay attention to avoid using complex animation effects in large lists to ensure a smooth rolling experience. 5. Avoid excessive drawing: In the drawing stage, avoid unnecessary drawing operations can improve performance.For example, tailoring can be used to restrict drawing areas, or cache to avoid repeatedly drawing the same content. In summary, by using ViewHolder mode, Diffutil for differential updates, reasonable use of ItemDecora, the use of animation effects with caution, and avoiding excessive drawing, can effectively optimize the performance of RecyclerView, and provide a smooth user experience when processing large lists when processing large listsEssence Note: The above code examples are for reference only, and the specific realization is different from the project needs.