What is the ViewHolder-Pattern?
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The ViewHolder Pattern is an optimization technique used in Android development to improve the performance of list-based user interfaces, such as ListView or RecyclerView. It reduces the number of calls to findViewById() and enhances scrolling performance by caching view lookups.
Key Concepts:
ViewHolder Class: A static inner class (or a separate class) that holds references to the views in a list item layout. This class contains member variables for the views you want to access.
View Recycling: When a list item is scrolled off the screen, its view can be reused for a new item that comes into view, reducing the need to inflate new views.
Efficient Binding: In the adapter’s getView() or onBindViewHolder() method, the ViewHolder is used to set data for the views without repeatedly finding them by ID, leading to smoother scrolling and better performance.