Add resource generic icon ic_listitem_edit.png. Note resource file name must be lowercase, no spaces.

Reference
Android Asset Studio
https://android-ui-utils.googlecode.com/hg/asset-studio/dist/index.html
generic icon, clip art, set dip 20, color 0, override default name to ic_listitem_edit (no .png extension, web site will add it).
Can't download blob.http with Safari, use Chrome.
In res/layout add list_item_layout.xml.  TODO: Customize file.