如何使用RecyclerView中的不同数据和照片打开项目点击的新活动

Question

EDIT 我（将onClick移动到onBindViewHolder但仍未成功

我尝试使用RecyclerView创建应用程序，您可以在其中查看项目的详细信息。所以你有一个带照片及其标题的项目列表。当您单击它时，将显示新屏幕，其中包含新/不同的照片，相同的标题和其他文本。 应用程序设计与图片

相同

我的适配器的代码是：

公共类RecyclerAdapter扩展了recyclerView.Adapter {

private String[] titles = {
        "Title A",
        "Title B",
        "Title C"};

private String[] description = {
        "Description A",
        "Description B",
        "Description C"};
   private int[] images = {
       R.drawable.picture A,
       R.drawable.picture B,
       R.drawable.picture C,};
 private int[] images2 = {
        R.drawable.picture A2,
        R.drawable.picture B2,
        R.drawable.picture C2,
};
class ViewHolder extends RecyclerView.ViewHolder{

    public ImageView itemImage;
    public ImageView itemImage2;
    public TextView itemTitle;
    public TextView itemTitle2;

    public ViewHolder(View itemView) {
        super(itemView);
        itemImage = (ImageView)itemView.findViewById(R.id.image_start);
        itemTitle = (TextView)itemView.findViewById(R.id.article_title);
//SecondActivity where different picture and decription should be displayed, but when I uncomment it the app crashes
   //itemTitle2 =(TextView)itemView.findViewById(R.id.article_ingredients);
//itemImage = (ImageView)itemView.findViewById(R.id.image_details);

        itemView.setOnClickListener(new View.OnClickListener() {
            @Override public void onClick(View v) {

                int position = getAdapterPosition();
                Intent intent = new Intent(v.getContext(), SecondActivity.class);

                intent.putExtra("title",itemTitle.getText().toString());
                intent.putExtra("description", itemTitle2.getText().toString()); //this one on makes app crash
                v.getContext().startActivity(intent);

                       }
        });
    }

}

@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
    View v = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.article_layout, viewGroup, false);
            ViewHolder viewHolder = new ViewHolder(v);
    return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
    viewHolder.itemTitle.setText(titles[i]);
//  viewHolder.itemDetail.setText(details[i]);
    viewHolder.itemImage.setImageResource(images[i]);
   // viewHolder.itemTitle2.setText(titles2[i]);

}

@Override
public int getItemCount() {
    return titles.length;
}
}

我尝试了不同的选择，但没有结果。在此先感谢您的帮助

Answer 1

您已注释掉itemTitle2 =(TextView)itemView.findViewById(R.id.article_ingredients);，当您尝试在其上调用getText()时，可能会导致空指针异常。

取消注释该行，然后在onBindViewHolder中取消注释此行：viewHolder.itemTitle2.setText(titles2[i]);。

如果您收到新错误，请告诉我并确保为我们添加堆栈跟踪。