android - 在谷歌眼镜中显示菜单

Question

您好，我在沉浸式学习中在普通卡片上创建菜单时遇到了问题。这是我目前所拥有的:

我有一个像这样实现 OnItemClickListener 的 CardScrollAdapter:

私有(private)类 ExampleCardScrollAdapter 扩展 CardScrollAdapter 实现 OnItemClickListener {

    @Override
    public int findIdPosition(Object id) {
        return -1;
    }

    @Override
    public int findItemPosition(Object item) {
        return mCards.indexOf(item);
    }

    @Override
    public int getCount() {
        return mCards.size();
    }

    @Override
    public Object getItem(int position) {
        return mCards.get(position);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        View rowView = convertView;
        ViewHolder holder;

        if(rowView==null) {
            rowView = mInflater.inflate(R.layout.card_layout, null);
            holder = new ViewHolder();
            holder.mainText = (TextView) rowView.findViewById(R.id.tvMainText);
            holder.fullImage = (ImageView) rowView.findViewById(R.id.fullImage);
            holder.image1=(ImageView) rowView.findViewById(R.id.ivImage1);
            holder.image2 = (ImageView) rowView.findViewById(R.id.ivImage2);
            holder.image3 = (ImageView) rowView.findViewById(R.id.ivImage3);
            holder.llImages = (LinearLayout) rowView.findViewById(R.id.llImages);
            holder.llSecondaryImages = (LinearLayout) rowView.findViewById(R.id.llSecondaryImages);
            rowView.setTag( holder );
        } else holder = (ViewHolder) convertView.getTag();

        CustomCard myObject = (CustomCard) getItem(position);

        if (myObject.getCompanyInfo()!=null) {

            System.out.println(myObject.getImageURL());
            System.out.println(myObject.getCompanyInfo());

            holder.mainText.setText(myObject.getCompanyInfo());
            imageLoader.DisplayImage(myObject.getImageURL(), holder.image1);

            holder.mainText.setVisibility(ImageView.VISIBLE);
            holder.llImages.setVisibility(ImageView.VISIBLE);
            holder.image1.setVisibility(ImageView.VISIBLE);

        } else {
            imageLoader.DisplayImage(myObject.getImageURL(), holder.fullImage);
            holder.llImages.setVisibility(ImageView.VISIBLE);
            holder.fullImage.setVisibility(ImageView.VISIBLE);
        }

        holder.image2.setVisibility(ImageView.GONE);
        holder.image3.setVisibility(ImageView.GONE);
        holder.llSecondaryImages.setVisibility(ImageView.GONE);

        return rowView;
    }

    public class ViewHolder {
        public TextView mainText;
        public ImageView fullImage;
        public ImageView image1;
        public ImageView image2;
        public ImageView image3;
        public LinearLayout llImages;
        public LinearLayout llSecondaryImages;
    }

    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        System.out.println("Click" + position);
        onCreateOptionsMenu(null);

    }

}

当我点击我的卡片时，它会打印“点击”和卡片的位置，这样就可以了。

之后，我想运行如下所示的 onCreateOptionsMenu:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.card_menu, menu);
    return true;
}

我遇到的问题是了解如何使 onCreateOptionsMenu 运行？我必须从 onItemClick 方法而不是 null 提供的 Menu 菜单是什么？

//乔金姆

Answer 1

对于这种情况，您不需要单独的 Activity — 只有在需要显示 Activity 卡片中的菜单时才应该这样做。

错误出在您原来的 onItemClick 方法中:您应该调用 openOptionsMenu 来显示菜单，而不是 onCreateOptionsMenu。