How to view default android simple_spinner_dropdown_item style

Question

Often I like the default style for Android for a particular widget.

Often I like to slightly modify this default style, rather than creating my own style from scratch.

Now I use android.R.layout.simple_spinner_dropdown_itemas dropDownViewResource on my spinner adapter - like this:

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

I can open this xml file layout and copy its contents to change it. But the most important part of this xml file is the attribute style, it looks like this:style="?android:attr/spinnerDropDownItemStyle"

Now, my question is: how do I find / view / copy this style spinnerDropDownItemStyle, so I can, for example, just change the background color.

Thanx for your help

Answer 1

spinnerDropDownItemStyle:

https://github.com/android/platform_frameworks_base/blob/master/core/res/res/values/themes.xml

Spinner, 9 -:

https://developer.android.com/studio/write/draw9patch.html

:

http://www.gersic.com/blog.php?id=57

Answer 2

. seprate spinner setDropDownResource()

adapter.setDropDownViewResource(android.R.layout.CUSTOM_LAYOUT);