Question

我有一个recyclerview.Adapter类这是我的班级：当我在MovieViewHolder onCreateViewHolder类参数中传递int位置时不起作用：（

public class Main_Recycle_Adapter extends RecyclerView.Adapter<Main_Recycle_Adapter.MovieViewHolder> {
    List<Main> movies = Collections.emptyList();
    LayoutInflater layoutInflater;
    Context context;

    public Main_Recycle_Adapter(Context context, List<Main> movies){
        this.context = context;
        layoutInflater = LayoutInflater.from(context);
        this.movies = movies;


    }
//;;;;;;;;;;;;;;
@Override
public int getItemCount() {
    return movies.size();
}


    @Override
    public long getItemId(int position) {
        return position;

    }
    //[[[[[[[[[[[[[[[[[[


    @Override
    public MovieViewHolder onCreateViewHolder(ViewGroup parent, int viewType ) {
            View row;
            if ((position % 2) == 0 ){
        row = layoutInflater.inflate(R.layout.grid_list3, parent, false);}
            else{row = layoutInflater.inflate(R.layout.grid_list3, null);}
        MovieViewHolder holder = new MovieViewHolder(row);

        return holder;
    }
    @Override
    public void onBindViewHolder(MovieViewHolder holder, int position) {
        Main thisMovie = movies.get(position);

        holder.tozih.setText(thisMovie.getName());
        holder.tablooo.setImageResource(context.getResources().getIdentifier(thisMovie.getLogo(), "mipmap", context.getPackageName()));
    }


    public class MovieViewHolder extends RecyclerView.ViewHolder {

        private TextView tozih;

        private ImageView tablooo;

        public MovieViewHolder(View itemView) {
            super(itemView);

            tozih = (TextView) itemView.findViewById(R.id.textView1);

            tablooo = (ImageView) itemView.findViewById(R.id.imageView1);
        }
    }
}

这里我想要偶数和奇数行的位置：

 if ((position % 2) == 0 ){
            row = layoutInflater.inflate(R.layout.grid_list3, parent, false);}
                else{row = layoutInflater.inflate(R.layout.grid_list3, null);}

但是位置仍然是红色，无法解决错误在这种情况下我该怎么办？提前谢谢

编辑感谢alex我已经完成了这件事：

@Override
public int getItemViewType(int position )
{ int viewType ;
    if((position % 2) == 0 )
        viewType = 0;
    else
        viewType =1;
    return viewType; }
//[[[[[[[[[[[[[[[[[[
@Override
public MovieViewHolder onCreateViewHolder(ViewGroup parent, int viewType )
{
    View row;
    if (viewType == 0 ){
        row = layoutInflater.inflate(R.layout.grid_list2, parent, false);}
    else
    { row = layoutInflater.inflate(R.layout.grid_list3, parent, false);}

只需要那两行中的父和假......

Answer 1

您可以覆盖getItemViewType(int position)方法并将条件放在那里。（if（position％2 == 0）并根据该条件返回视图类型。）当然，您需要声明两种视图类型，并根据您的标准返回正确的视图类型。

在onCreateViewHolder中，您可以检查viewType并为该位置充气正确的布局。

从RecyclerView.Adapter获取位置

1 个答案: