Using android studio 2.1.2 I added navigation activity from standard library. It inflates menu with some default items:
How can I remove those borders from menu items?
Device: Asus padfone 2 Android 4.1.1
Compilation: compileSdkVersion 23 buildToolsVersion "23.0.2" minSdkVersion 16 targetSdkVersion 23 com.android.support:appcompat-v7:23.4.0
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://i.stack.imgur.com/LJxeO.jpg', '推荐 疯言疯语 的文章《Android: How to remove borders around navview menu》','https://www.manongdao.com/article-1099699.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}