Question

我遇到过这个问题

使用交错的网格视图，它有两列和单列的组合。这样的东西

一切正常，直到我向上和向下滚动几次然后随机改变为这样的东西

更多的卷轴，它最终像这样

我不知道为什么和它非常随机。每次显示页面时我都尝试做一个notifyDataSetChanged，并且似乎什么都不做

这是我的信息中心的代码

public class DashboardStaggered extends Fragment {
    RecyclerView mRecyclerView;
    View v;
    MasonryAdapter adapter;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        Log.d("MASONRY", "onCreateView");
        super.onCreate(savedInstanceState);
        if(v==null) {
            Log.d("MASONRY", "v is NULL recreating");
            v = inflater.inflate(R.layout.activity_dashboard_staggered, container, false);
            setupRecyclerView();
        }else{
            Log.d("MASONRY", "v is NOT NULL");

        }

        return v;
    }

    private void setupRecyclerView(){
        mRecyclerView = (RecyclerView) v.findViewById(R.id.masonry_grid);
        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
        adapter = new MasonryAdapter(getActivity(),this);
        mRecyclerView.setAdapter(adapter);
        SpacesItemDecoration decoration = new SpacesItemDecoration(12);
        mRecyclerView.addItemDecoration(decoration);
        adapter.notifyDataSetChanged();

    }
    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.d("MASONRY", "onResume");
        if(mRecyclerView==null) {
            setupRecyclerView();
        }



    }
    @Override
    public void onPause() {
        super.onPause();
        Log.d("MASONRY", "onPause");

    }

}

如果需要，我也可以发布适配器。任何建议都受到高度赞赏。

此处的适配器代码（不想让帖子凌乱）http://pastebin.com/QkZbjjp1

修剪代码http://pastebin.com/Hgsji1RG

Answer 1

正如杰森在评论中提到的那样，这是itemgetviewtype中的一个错误，逻辑错误比什么都重要。但经验教训，getItemViewType的更新代码是

@Override
    public int getItemViewType(int position) {
        // Return type based on position
        return tileDefinitions.get(position).getTileType();
    }

感谢大家指出。

Answer 2

这是因为当您向上和向下滚动时，持有者无法识别图像视图的宽度和高度。当您向下滚动时它会清除上部视图，反之亦然。

像这样使用：

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {

    MyViewHolder vh = (MyViewHolder) viewHolder;
    ImageModel item = imageModels.get(position);
    RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) vh.imageView.getLayoutParams();
    float ratio = item.getHeight() / item.getWidth();
    rlp.height = (int) (rlp.width * ratio);
    vh.imageView.setLayoutParams(rlp);
    vh.positionTextView.setText("pos: " + position);
    vh.imageView.setRatio(item.getRatio());
    Picasso.with(mContext).load(item.getUrl()).placeholder(PlaceHolderDrawableHelper.getBackgroundDrawable(position)).into(vh.imageView);
}

清楚看到这个链接： Picasso/Glide-RecyclerView-StaggeredGridLayoutManager

StaggeredGridView在滚动时更改项目大小

2 个答案: