Wakes up all threads that are waiting on this object's monitor. Wakes up a single thread that is waiting on this object's monitor. Returns a hash code value for the object. Returns the runtime class of this Object. Indicates whether some other object is "equal to" this one.Ĭalled by the garbage collector on an object when garbage collection determines that there are no more references to the object. Updates the action with given parameters.Ĭreates and returns a copy of this object. Update(int dx, int dy, int duration, Interpolator interpolator) Sets the interpolator to calculate scroll steps SetInterpolator( Interpolator interpolator) Instead of specifying pixels to scroll, use the target position to jump using scrollToPosition(int). (int dx, int dy, int duration, Interpolator interpolator) Holds information about a smooth scroll request by a RecyclerView.SmoothScroller. Show your love by sharing this blog with your fellow developers.Public static class Ī7. These are things that we can do to improve the performance of RecyclerView. Generally, we do not change the size of the View Cache, but experiment with it, if it works for you, implement it. It means that when we scroll the RecyclerView such that there's a view that is just barely completely off-screen, the RecyclerView will keep it around so that we can scroll it back into view without having to call the onBindViewHolder() again. The offscreen view cache stays aware of changes in the attached adapter, allowing a LayoutManager to reuse those views unmodified without needing to return to the adapter to rebind them. setItemViewCacheSize (cacheSize )Īs per the official documentation: It sets the number of offscreen views to retain before adding them to the potentially shared recycled view pool. Whenever we have the use-case of the removal, the updation, the addition of item, use the Notify Item API. We can see the improvement in our RecyclerView by doing so. We should check our onBindViewHolder method and optimize it. Our onBindViewHolder method should do very less work. Problem Solved! Do less in onBindViewHolder method Then, we will be able to set the width and height prior only. So, we should ask our backend developer to send the image size or the aspect ratio, accordingly, we can calculate the required width and height of the ImageView. If we do not set the correct image width and height prior, the UI will flicker during the transition of loading(downloading of image) and setting of the image into the ImageView(actually making it visible when downloading completes). If our image width and height are dynamic(not fixed), and we are getting the imageUrl from the server. If you are curious to know: How The Android Image Loading Library Glide and Fresco Works? Read here. So, always use Image-Loading libraries.ĭelegate all the image-related tasks to these libraries. The best part is that Image-Loading libraries like Glide, Fresco uses this bitmap pool concept. By using the bitmap pool concept, we can avoid it. Let's get started Use Image-Loading LibraryĪs the Garbage Collection(GC) runs on the main thread, one of the reasons for unresponsive UI is the continuous allocation and deallocation of memory, which leads to the very frequent GC run. Let's see what are the things which we can do to improve the performance of the RecyclerView and hence, we get the smooth scrolling. It leads to bad user experience as it seems that our Android App is laggy. When we implement RecyclerView in our Android Application, sometimes, we face problems like: The RecyclerView items are not scrolling smoothly. With these optimizations, we can make the RecyclerView scrolling smooth. In this blog, we are going to learn how to optimize the RecyclerView performance in Android. I am Amit Shekhar, a mentor helping developers in getting high-paying tech jobs.īefore we start, I would like to mention that, I have released a video playlist to help you crack the Android Interview: Check out Android Interview Questions and Answers.
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