I am trying to use appcompat in my application. I have done everything according to the instructions. But when I add android-support-v7-appcompat as a library in my proect,
Delete jar library from every directory you add. Then you need to add appcompat as a dependency. If you use Android Studio, you need to do as following:
add this
compile 'com.android.support:appcompat-v7:18.0.+'
into your gradle dependencies and after that, Build -> Rebuild Project.