Android（ListView 和RecyclerView区别） _recyclerview

业无高卑志当坚，男儿有求安得闲？这篇文章主要讲述Android：ListView 和RecyclerView区别相关的知识，希望能为你提供帮助。
缓存机制 ListView的两级缓存
ListView的缓存和复用由它的父类AbsListView中的RecycleBin实现，设了两个缓存数组mActiveViews和mScrapViews。mActiveViews缓存显示在屏幕中的view，mScrapViews按ViewType缓存离屏的view

class RecycleBin { /** * The position of the first view stored in mActiveViews. */ private int mFirstActivePosition; /** * Views that were on screen at the start of layout. This array is populated at the start of * layout, and at the end of layout all view in mActiveViews are moved to mScrapViews. * Views in mActiveViews represent a contiguous range of Views, with position of the first * view store in mFirstActivePosition. */ private View[] mActiveViews = new View[0]; /** * Unsorted views that can be used by the adapter as a convert view. */ private ArrayList< View> [] mScrapViews; }

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RecyclerView的四级缓存
RecyclerView的缓存和复用由Recycler实现，mAttachedScrap和mCachedViews的缓存方式跟ListView相似。mRecyclerPool是多个RecyclerView的复用池，mViewCacheExtension不直接使用，需要用户再定制，默认不实现。

public final class Recycler { final ArrayList< ViewHolder> mAttachedScrap = new ArrayList< > (); final ArrayList< ViewHolder> mCachedViews = new ArrayList< ViewHolder> (); RecycledViewPool mRecyclerPool; private ViewCacheExtension mViewCacheExtension; }