Ignoring Android API artifact com.google.android:android:2.2.1 for debug/release

Ignoring Android API artifact com.google.android:android:2.2.1 for debug/release

Warning:Ignoring Android API artifact com.google.android:android:2.2.1 for debug
Warning:Ignoring Android API artifact com.google.android:android:2.2.1 for release

Android studio upgrade to 2.2, the compiler version will appear the following error, which is why? Do not understand, request settlement, thank you.

Upgrade to the latest version of AndroidStudio no longer appear this problem, is the tool bug?

Ans :-1

Have you tried using the latest version in your build.gradle?

dependencies {
        classpath 'com.android.tools.build:gradle:2.2.1'
}