RecyclerView瀑布流优化方案探讨，Android屏幕适配很难嘛其实也就那么回事

本文主要是介绍RecyclerView瀑布流优化方案探讨，Android屏幕适配很难嘛其实也就那么回事，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

int itemCount = adapter.getItemCount();
int childCount = layoutManager.getChildCount();
RefreshLogUtils.d(“SpaceViewItemLine–count–”+itemCount + “-----”+childCount+"—索引–"+position+"—"+spanIndex);
if (position<itemCount && spanCount2) {
if (childCount % 2 == 0){
//这个是右边item
outRect.left = 5;
outRect.right = 20;
} else {
//这个是左边item
outRect.left = 20;
outRect.right = 5;
}
if (childCount1 || childCount==2){
outRect.top = 0;
} else {
outRect.top = 20;
}
RefreshLogUtils.d(“SpaceViewItemLine–间距–”+childCount+"----"+outRect.left+"-----"+outRect.right);
}
}
});

recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
@Override
public void getItemOffsets(@NonNull Rect outRect, @NonNull View view,
@NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
super.getItemOffsets(outRect, view, parent, state);
int position = parent.getChildAdapterPosition(view);
int spanCount = 0;
int spanIndex = 0;
RecyclerView.Adapter adapter = parent.getAdapter();
RecyclerView.LayoutManager layoutManager = parent.getLayoutManager();
if (adapternull || layoutManagernull){
return;
}
if (layoutManager instanceof StaggeredGridLayoutManager){
spanCount = ((StaggeredGridLayoutManager) layoutManager).getSpanCount();
spanIndex = ((StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams()).getSpanIndex();
}
//普通Item的尺寸
int itemCount = adapter.getItemCount();
int childCount = layoutManager.getChildCount();
RefreshLogUtils.d(“SpaceViewItemLine–count–”+itemCount + “-----”+childCount+"—索引–"+position+"—"+spanIndex);
if (position<itemCount && spanCount2) {
if (spanIndex != GridLayoutManager.LayoutParams.INVALID_SPAN_ID) {
//getSpanIndex方法不管控件高度如何，始终都是左右左右返回index
if (spanIndex % 2 == 0) {
//这个是左边item
outRect.left = 20;
outRect.right = 5;
} else {
//这个是右边item
outRect.left = 5;
outRect.right = 20;
}
if (childCount1 || childCount==2){
outRect.top = 0;
} else {
outRect.top = 20;
}
}
//outRect.top = space;
RefreshLogUtils.d(“SpaceViewItemLine–间距–”+spanIndex+"----"+outRect.left+"-----"+outRect.right);
}
}
});

05.自定义Manager崩溃

• RecyclerView莫名的Inconsistency detected崩溃；

• 出现这个异常原因：

• 使用RecyclerView加官方下拉刷新的时候，如果绑定的List对象在更新数据之前进行了clear，而这时用户紧接着迅速上滑RV，就会造成崩溃，而且异常不会报到你的代码上，属于RV内部错误。

• 自定义一个CustomStaggeredGridLayoutManager 在onLayoutChildren对异常进行捕获：

public class CustomStaggeredGridLayoutManager extends StaggeredGridLayoutManager {
private static final String TAG = “LOG_CustomStaggered”;
public CustomStaggeredGridLayoutManager(Context context, AttributeSet attrs, int defStyleAttr,

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