滚动列表视图导致按钮被无形 [英] scrolling listview causes buttons to be invisible

问题描述

我有包含列表的每一行中的一个按钮的列表视图。 基于一个领域，我想使这个按钮不可见的。

I have a list view which contains a button in each row of the list. Based upon a field, I want to make this button invisible.

我getView内部适配器方法如下所示。

My getView method inside adapter is shown below.

    public View getView(int position, View convertView, ViewGroup parent) {
                // TODO Auto-generated method stub

                Activity activity = (Activity) getContext();
                View view = convertView;

                if (convertView == null) {
                    LayoutInflater inflater = activity.getLayoutInflater();
                    view = inflater.inflate(R.layout.listrow, null);
                }

                final Details details = getItem(position);
                Button btn = (Button) view.findViewById(R.id.btn);

                if(details.check()) {
                    btn.setVisibility(View.INVISIBLE);
                }
    }

当我加载该页面中的数据来自正确。但是，当简单地通过这个列表中滚动，那么这个按钮是越来越看不到的。请告诉我这样做的原因是什么？当我删除如果部分，然后我将获得按钮的所有行，即使我卷轴。有什么问题给无形在 getView（）。请回复。先谢谢了。

When I load this page the data comes correctly. But when simply scroll through this list, then this button is getting invisible. Whats the reason for this? When I remove that if section, then i will get buttons for all rows, even if i scrolls. Is there any problem giving invisible inside getView(). Please reply. Thanks in advance.

推荐答案

添加以下内容：

if(details.check()) {
   btn.setVisibility(View.INVISIBLE);
}
else {
   btn.setVisibility(View.VISIBLE);
}

和......那不如用

and...it had better use

LayoutInflater.from(getContext()) 

代替

activity.getLayoutInflater（）

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