Error at lib support appcompat_v7

Question

I am having trouble to at library appcompat_v7

It have error on path

res/values-v21/styles_base.xml

and at line 75 show erro

Answer 1

home/user/workspace/appcompat_v7/res/values-v21/themes_base.xml:156: error: Error: No resource found that matches the given name: attr 'android:colorControlNormal'.

I assumed values-v21 stands for api level 21, so I updated to android 5.0 and it works for me.