Failed to resolve: com.android.support:support-v4:22.0

[Saeid Asadi]

hi, i added this library to my project and get this problem,
compile 'com.android.support:support-v4:22.0'
i tried to fix that with this code:
compile 'com.android.support:support-v4:22.0.0'
but not worked and get this problem:
Error:(30, 26) error: package R does not exist !!!!!!!!!!!!
please help me

[徐精华]

@johnAsa May be you need to change your compileSdkVersion . Mine is 26 and that solved my problem.