请建议我用它来创建它的任何做法。

查询：我创建2 - 微调来看，这里我要补充国家/城市名单，所以，就像如果我选择印度，然后我得到50项下拉视图中，问题与此是，它走的是整页的高度。

Query : I am creating 2-Spinner view , where i have to add Country/Cities list , So like if i am selecting india then i am getting 50 items inside the drop down view , problem with this is that it is taking the whole page in height .

我要什么：我想创建一个下拉视图，其中用户只能看到10项 下拉查看，其他项目将被显示，每当用户将滚动下拉视图。

What i want : I want to create a drop down view , where user can see only 10 items in the drop down view , other items will be shown whenever user will scroll the drop down view .

推荐答案

您可以使用反射。

    Spinner spinner = (Spinner) findViewById(R.id.spinner);
    try {
        Field popup = Spinner.class.getDeclaredField("mPopup");
        popup.setAccessible(true);

        // Get private mPopup member variable and try cast to ListPopupWindow
        android.widget.ListPopupWindow popupWindow = (android.widget.ListPopupWindow) popup.get(spinner);

        // Set popupWindow height to 500px
        popupWindow.setHeight(500);
    }
    catch (NoClassDefFoundError | ClassCastException | NoSuchFieldException | IllegalAccessException e) {
        // silently fail...
    }