DataBinding | Android Data Binding in context of MVP pattern | Architecture library

I have an Android application with Bottom Navigation Bar. In the Main Activity I have a floating button and when I press it, I would like to open a Fragment (or another activity?) that will cover the whole screen (the Bottom NavBar and other content will be below my new opened fragment). I would like to add that this newly opened fragment will be used for adding some item and when the user fills all fileds like name, weight etc. and click "add", the fragment should be closed and we should see our bottom nav bar with its' fragments.

Could you provide the solution to my problem? I would be grateful for some code enabling to do this!

Here are the most important parts of my code:

activity_main.xml:

when I run android application in real device I am getting following gradle errors

After upgrading to android 12, the application is not compiling. It shows

"Manifest merger failed with multiple errors, see logs"

Error showing in Merged manifest:

Merging Errors: Error: android:exported needs to be explicitly specified for . Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. main manifest (this file)

I have set all the activity with android:exported="false". But it is still showing this issue.

My manifest file:

I have error like this after trying to build my apps in Emulator

/Users/joel/.gradle/caches/transforms-3/06231cc1265260b25a06bafce7a4176f/transformed/core-1.7.0-alpha02/res/values/values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.

I don't know what causes this error. After digging some answer which has similarly error (but in flutter) Problem. But still not solved my issue.

I have this dependency in my project

It was a project that used to work well in the past, but after updating, the following errors appear.

I'm receving the below error in API 31 devices during Firebase Auth UI library(Only Phone number credential),

I have an Int which contains a decimal number in units of tenths, so for example my int holds 308 to represent the decimal number 30.8. I want to use data binding to display this number in a TextView along with some other text. My TextView has the following text entry:

I am attempting to set up a recycler view, with the elements being displayed by it using a ConstraintLayout. I used the layout from this example by Google as a guideline.

However, despite specifying android:layout_width="match_parent" all the way down, the result being finally displayed on screen is more akin to wrap_content.

1. Changing the ConstraintLayout to a LinearLayout
2. The workaround suggested in this stackoverflow question
3. Setting android:layout_width=0, while using a ConstraintLayout and anchoring start, end and top to the parent
4. Wrapping the whole thing inside a CardView
5. Running the app on multiple devices, both emulated and physical

If anything else of interest is missing, please let me know.

I'm trying to use Kaspresso for tests and I'm checking whether a view has a certain drawable with the method: