Android Question About activity title bar and AppCompat

[Xicu]

In my application in each activity a title bar appears.
Since I have added the Multiphotopicker library(https://www.b4x.com/android/forum/threads/multiphotopicker.82923/#content), which requires the additional Appcompat library, the title bar has disappeared in all my activities
If in each activity I incorporate the line '#Extends line: android.support.v7.app.AppCompatActivity' the title bar reappears.
Is this the right solution?.
I probably have a concept error, but:
Is it possible not to use the AppCompat library in my activities displaying the original title bar, and keep the appcompat library only for multiphotopicker requirements?

 

[Erel]

You should probably make the activity an AppCompatActivity.
This requires two steps:
1. Add the #Extends attribute.
2. Set the theme with the manifest editor.

See this example: https://www.b4x.com/android/forum/threads/appcompat-with-toolbar-minimal-example.79896/