Android Question missing android.support.v7.app.AppCompatActivity

There is no and there never was a android.support.v7.app.AppCompatActivity.jar. You don't need it.

Your setup looks ok from the screenshots.

You should not add additional libraries to the B4A installation folder. Use the additional libraries folder for this (Tools->Configure Paths).

What error do you get?

thanks, I start to see my problem, I confused some things.
I read in some commentaries, about this path: sdk\extras\android\support\v7\appcompat\res and also about android-support-v4, and android.support.v7.app.AppCompatActivity, and I very sure that I read something about android-support-v7, and I made a mess.

I assumed :

android.support.v7.app.AppCompatActivity = android-support-v7

How I have android-support-v4 in my b4a Libraries (which is another mess, I know ) I imagined I need to have android-support-v7 in it.

And I still looking for the path sdk\extras\android\support\v7\appcompat\res or similar

and about my error, I will comment it in another thread because is not related

thank you.

My suggestion:

First clean up your installation:
- Deinstall B4A.
- Remove all libraries which may be left in <Program Files>\Anywhere Software\Basic4Android\Libraries
- reinstall B4A
- Setup a Folder for your additional libraries and configure it in Tools->Configure Paths.
- Put all additional libraries only in this folder.

If you don't do this I guess you will sooner or later run into troubles.

For the AppCompat and Support library stuff. Don't care about them anymore. Install the Android Support Repository and Google Repository with SDK Manager. Don't add any libraries like android-support-v4.jar etc to your libraries folders.

If you have an (example) project which still references AppCompat resources with #AdditionalRes: .....\appcompat\.... remove such lines. They are not needed anymore.
If a project complains about missing android-support-v4.jar you should add the following line to your project:
This should fix it.

thanks a lot for the help. I already changed my b4a library

hi i use AppCompat library in my program
and when i install my app , the app was stopped and dont run
can you help me?

Please start a new thread and give detailed error description (error stack etc.)