Question

大家好！这可能和派一样容易，但是说实话，我已经苦苦挣扎了大约1.5个小时。

我想要实现的是通过AdapterView.OnItemClickListener中的id来区分ListPopupWindow（用作微调器的替代品），但是由于以下原因，我无法做到这一点：

不可转换的类型，无法将'android.view.View'强制转换为'android.Widget.ListPopupWindow'

in line：ListPopupWindow listPopupWindow =   （ListPopupWindow）父级；

AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            ListPopupWindow listPopupWindow = (ListPopupWindow) parent;
            int lpwID = listPopupWindow.getId();
            switch (lpwID) {
                ...
            }

        }
    };

我的其余代码如下：

    //text views, ListPopupWindows & anchors, ArrayLists
    tvCategory = findViewById(R.id.tvCategory_activityEvent);
    tvSubcategory = findViewById(R.id.tvSubcategory_activityEvent);

    lpwCategory = new ListPopupWindow(this);
    lpwSubcategory = new ListPopupWindow(this);

    lpwCategory.setAnchorView(tvCategory);
    lpwSubcategory.setAnchorView(tvsubcategory);

    //arrayAdapters
    lCategories = DBManager.getDbInstance(Event.this).serviceCategoryDAO().getCategories();
    aaCategory = new ArrayAdapter<>(Event.this, R.layout. spinner_item , lCategories);
    aaSubcategory = new ArrayAdapter<>(Event.this, R.layout.spinner_item);

    aaCategory.setDropDownViewResource(android.R.layout. simple_spinner_dropdown_item );
    lpwCategory.setAdapter(aaCategory);
    aSubcategory.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    lpwSubcategory.setAdapter(aaSubcategory);

    lpwCategory.setOnItemClickListener(onItemClickListener);
    lpwSubcategory.setOnItemClickListener(onItemClickListener);

另一个问题是：如何将ID分配给ListPopupWidows？说到微调器，它很简单：

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Spinner spinner = (Spinner) parent;
spinnerId = spinner.getId
...}

任何提示，技巧和窍门都将不胜感激，因为以下几个原因，我想远离微调：)谢谢！！

Android在AdapterView.OnItemClickListener中区分ListPopupWindows（按ID）

0 个答案: