download android support v7 jar quality: Support Library | Android Developers,Maven Repository: com.android.support » appcompat-v7,Recent Support Library Revisions | Android Developers,Support Library Setup | Android Developers,
error: package android.support.v7.app does not exist. It was complaining about this import statement. import android.support.v7.app.ActionBarActivity; I made sure to visit the SDK manager, and it says Android Support Library is installed.
Some deprecated classes removed as we move away from old pre-V14 APIs, such as android.support.v7.NotificationCompat (use v4 NotificationCompat instead), KeyEventCompat, ParallelExecutorCompat, and SearchViewCompat. Migrated wear manifest metadata constants are all now available via android.support.wear.utils.MetadataConstants.
For example, the support-v4 and the support-v7 package both support a minimum API level of 14, for releases of the Support Library from 26.0.0 and higher. Support Library Release Versions
You must be able to find this project in your workspace. This project contains android-support-*.jar file. This is a new library project. In turn, your project receives a dependency on that library project. You can stay with the updated configuration "as is" and start using compatibility API.