Question

我想以编程方式在适配器中按位置选择项目在我的项目中，我有一个获取类别的活动，现在我想自动从这个适配器中选择一个项目。

最终结果是：在用户点击按钮并在午餐后进行家庭活动之后，在适配器中从Web服务获取我的类别的第二个活动，然后在适配器上按位置选择项目并运行显示项目内容的第三个活动。

这是我的代码

public class AdapterCategory extends RecyclerView.Adapter<AdapterCategory.ViewHolder> {

    private List<Category> items = new ArrayList<>();

    private Context ctx;
    private OnItemClickListener mOnItemClickListener;

    public interface OnItemClickListener {
        void onItemClick(View view, Category obj, int position);
    }

    public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
        this.mOnItemClickListener = mItemClickListener;
    }

    // Provide a suitable constructor (depends on the kind of dataset)
    public AdapterCategory(Context context, List<Category> items) {
        this.items = items;
        ctx = context;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        // each data item is just a string in this case
        public TextView name;
        public TextView post_count;
        public LinearLayout lyt_parent;

        public ViewHolder(View v) {
            super(v);
            name = (TextView) v.findViewById(R.id.name);
            post_count = (TextView) v.findViewById(R.id.post_count);
            lyt_parent = (LinearLayout) v.findViewById(R.id.lyt_parent);
        }
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // create a new view
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_category, parent, false);
        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(ViewHolder holder, final int position) {
        final Category c = items.get(position);
        holder.name.setText(Html.fromHtml(c.title));
        holder.post_count.setText(c.post_count+"");

        holder.lyt_parent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (mOnItemClickListener != null) {
                    mOnItemClickListener.onItemClick(view, c, position);
                }
            }
        });
    }

    public void setListData(List<Category> items){
        this.items = items;
        notifyDataSetChanged();
    }

    public void resetListData() {
        this.items = new ArrayList<>();
        notifyDataSetChanged();
    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return items.size();
    }

}

更新：AdapterCategory代码

document.body.textContent = new Date().toLocaleTimeString()

如何以编程方式在适配器中选择项目（android）

0 个答案: