TabLayout | TabLayout extract from Android Design Library | Android library

I have the follow situation:

1. One layout with TabLayout, ViewPager and advertising banner on bottom

I have a view hierarchy as shown in the image below.

I'm getting strange scroll behaviors like,

1. If I scroll (drag slowly or fling) from Area 1 the AppBar collapses along with it. This is fine.
2. But if I drag slowly from Area 2 the AppBar does not collapse. It stays there and RecyclerView goes beneath it. However, it works fine with a fling.

activity_challenge_detail.xml

There's a BottomSheetDialogFragment and working good vertically dragging states on fragment layout and opening STATE_EXPANDED mode. There's a recyclerview inside it and dragging vertically works on the bottom sheet but it doesn't work on recyclerview because of scrolling event. How the bottom sheet dragging event to work instead of scroll event on recyclerview when reached top of list and still scrolling up for collapse the bottom sheet?

BottomSheetDialogFragment hierarchy:

I am facing a problem with my custom appbar in my fragment where nothing happens when I click any item in my appbar. I have followed this document to create an appbar in my fragment but still so success.

I have one activity that contains only a fragment container which I switch between fragments from. In one of fragments I want to add a custom fragment owned appbar. I first created a menu like this:

I have a custom CardView that contains a Button, a RadioButton and some Text. I have several of these card placed in a GridLayout. My goal is that each button will play a different sound that will be assigned to it. Is there a way to create one onClick method, that will change the sound played based on which button is clicked? Or do I have to assign a new onClick for each button?

Here is my activity_main.xml

I am trying to implement collapsing toolbar behaviour in my app with a tab layout. I want to hide the toolbar when in collapse mode and just show the tab layout in collapse mode and in normal mode until collapsed I want to show the toolbar with the title of the app. Currently, it works as I want in collapsed mode I just want to add a toolbar that hides in collapsed mode.

My code

I have a ViewPager2, with two pages. One the get an email and another to get a phone number. To obtain the values I added two get methods to the adapter but I'm not sure this is the correct and safest way to do it. Here is my code:

Actually in my app i had an activity which had a include of first fragment in it and then from that fragment i was able to press some buttons to navigate to another fragment, now i would change the activity and add a tablayout from which i will be able to navigate between the three fragments i have, but by reading the documentation i'm can't understand on how i can use the ViewPager2 to show my fragment in it by cliking on the tab.

My activity layout looks like this now:

I'm working on an Android app in Kotlin in which I have a ViewPager and I have a quite simple problem.

How can I change the current tab when the corresponding title is selected in the TabLayout?

Here is my code that configures the ViewPager: