在旋转器中更改选定项的颜色

Question

出于某种原因，我的旋转器中选定项的文本颜色为白色。以下是活动的代码：

spinner = (Spinner) findViewById(R.id.spinner_categories);
arr_list_categories = manager.get_all_categories();
arr_list_categories_names = new ArrayList<String>();
// Loop through the Categories array
for (int i = 0; i < arr_list_categories.size(); i++) 
{
    Category curr_category = arr_list_categories.get(i); // Get the Category object at current position
    arr_list_categories_names.add(curr_category.getCategory_name()
            .toString()); // Add the name of the Category to the Names Array        
}
// Setting the Adapter, to display retrieved data in the Spinner
adapter=new ArrayAdapter<String> (this, R.layout.simple_spinner_item, arr_list_categories_names);
// Setting the display source for the Spinner View
adapter.setDropDownViewResource(R.layout.simple_spinner_item);
// Populating the Spinner
spinner.setAdapter(adapter);
// Registering for On Item Selected listener
spinner.setOnItemSelectedListener(spinnerListener);

下面是simple_spinner_item的XML：

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:gravity="left"
    android:padding="5dip"
    android:textColor="#FF0000"
    android:textSize="20sp" />

下拉项显示为红色，但不显示所选项。我试图将XML中的textColor更改为selector:Android:textColor=“@drawable/spinner_text_color_selector”并创建了这个选择器：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:color="#FF0000"/><!-- pressed -->
    <item android:state_focused="true" android:color="#FF0000"/><!-- focused -->
    <item android:state_selected="true"  android:color="#FF0000"/>
    <item android:state_activated="true" android:color="#FF0000"/>
    <item android:color="#FF0000"/><!-- default -->
</selector>

但是所选项目的文本颜色仍然是白色。所以我尝试在OnItemSelectedListener中这样做：

TextView selected_tv = (TextView) parent.getChildAt(0);
selected_tv.setTextColor(Color.BLUE);

还是白色的...

为什么会发生这种情况，我如何修复它？谢谢！

Answer 1

TextView selected_tv = (TextView) parent.getChildAt(0);
selected_tv.setTextColor(Color.BLUE);

在此代码中，在第一行进行如下更改（使用TextView的id）：

TextView selected_tv = (TextView) parent.findViewById(R.id.selected_tv);
selected_tv.setTextColor(Color.BLUE);