我想写 BaseAdapter 我的 GrivView 但在

public View getView(int position, View convertView, ViewGroup parent) { ... }

在位置而呈现下一个内容是：

the position while rendering next elements is:

visible elements
---------------
|  1   2   3  |
|  4   5   6  | <--- screen
|  7   8   9  |
---------------

nonvisible elements
|  1   2   3  | <-- below visible area
|  4   5   6  |

在这里真正是：

where real is:

visible elements
---------------
|  1   2   3  |
|  4   5   6  | 
|  7   8   9  |
---------------

nonvisible elements
| 10  11  12  |
| 13  14  15  | 

我知道这是正确的行为（它计数唯一可见的元素），但如何让项目在列表中的实际位置？要不怎么知道我应该回到它的布局？

I'm aware it's correct behaviour (it counts only visible elements), but how to get the real position of item on list? Or how to know which layout should I return?

修改：但是返回的数量更比随机我发现，即使是在屏幕上

EDIT: However the returned number are much more random than I showed, even on screen.

推荐答案

使用 BaseAdapter 酷似谷歌Documentatnion 显示效果还算不错。

Using BaseAdapter exactly like Google Documentatnion shows works fine.

我的问题是：

不会使用ViewHolder

NOT using ViewHolder

或试图在viewHolder持有ID

or trying to hold id in viewHolder

我应该使用 ViewHolder 如下：

public View getView(int position, View convertView, ViewGroup parent) {
    // create holder
    ViewHolder holder; // check if layout exists

    if (convertView == null) { // if it's not recycled, initialize some

        LayoutInflater inflater = LayoutInflater.from(mContext);
        convertView = (LinearLayout) inflater.inflate(R.layout.card_prev,
                null);

        // Create layout elements
        ImageView image = (ImageView) convertView
                .findViewById(R.id.imageViewThumbnail);

        TextView desc = (TextView) convertView
                .findViewById(R.id.textViewDescription);


        // Place layout elements in holder
        holder = new ViewHolder();
        holder.id = position;
        holder.preview = image;
        holder.text = desc;

        convertView.setTag(holder);
    } else {
        // Get existing holder
        holder = (ViewHolder) convertView.getTag();
    }

    // Update layout here using layout elements from holder
    String imageName = "image_" + (position + 1);
    final int imageId = mContext.getResources().getIdentifier(imageName,
            "drawable", "com.myapp");

    holder.text.setText("" + (position+1));

    holder.preview.setImageResource(imageId);

    holder.preview.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent fullScreenIntent = new Intent(v.getContext(),
                    FullScreenImage.class);
            fullScreenIntent.putExtra("imageRes", imageId);

            MainMenuActivity.currentShownActivity
                    .startActivity(fullScreenIntent);

        }
    });

    return convertView;
}