Q:

Android support v7

I've recently got new laptop and downloaded new ADT for it. 2 months ago, I've started building application and already did much. But now new version of ADT force to make application always by using ActionBarActivity through android.support.v7 . So, my question is what should I do now? I have already android-support-v4.jar library in the project and am using it around 70% of all activities. Now when I'm creating new activity, it always creates one with the need of android-support-v7.jar (even for blank activities with static layout need) which I still don't have in project.
Should I just include new library in the project and continue working with android-support-v7 while making new activities and leave already done activities on v4 or I should make everything for v7 now, although 90% of application is done or I should just finish it with previous version of ADT?

A:

But now new version of ADT force to make application always by using ActionBarActivity through android.support.v7 

The stock templates will give you appcompat and ActionBarActivity. That does not mean that "ADT force to make application always" -- at most, that is just the starting point. You are welcome to work on existing projects, import blank projects, etc. in addition to creating new projects with the new-project wizard.
Similarly, you do not need the new-activity wizard to add an activity.

Should I just include new library in the project and continue working with android-support-v7 while making new activities and leave already done activities on v4 or I should make everything for v7 now, although 90% of application is done or I should just finish it with previous version of ADT?

Since your application is already in progress, you do not need to use either the new-project or new-activity wizards, and ADT will happily let you use whatever you want.

