I want to make a custom class AppCompatActivity there I can add my basic function and methods like hiding soft keyboard, hiding progress bar, and other methods that going to be used in the whole project constantly.

CodePudding user response：

Normally those utilities functions don't need an Activity to hold them, instead they will be put on another file: utils/ActivityUtils.java.

Here is an example in an Android Java project: https://github.com/Blankj/AndroidUtilCode/blob/master/lib/utilcode/src/main/java/com/blankj/utilcode/util/ActivityUtils.java

And in Kotlin: https://github.com/inusedname/Todo-App/blob/master/app/src/main/java/com/vstd/todo/others/utilities/ActivityUtils.kt