AppPreferences | Originally by Simon MacDonald

Recently I pushed the app to live and it was'nt working on android 9 & above. So, I upgraded android studio to 2020.3.1, updated the plugins, migrated code to AndroidX. Since then I am facing following issue.

Here is the error at runtime

I'm trying to implement Tapjoy Rewarded Videos into my app, however they're not showing up.

I want to get SharedPreferences value in initState of the page and pass the value to another method which returns Future too. But just because the SharedPreferences returns a Future which is its normal result, i can't pass it's value to another method. It always returns "null", here is my SharedPref method:

As I viewed the success API response, it seems it is sending the data but the data could not load to its corresponding Pojo class, where the size of ArrayList seems null. The POJO class structure seems fine from my side but could not figure out what the problem is. Here I've provided my log screenshot which returned the API data and the Log I kept to view the ArrayList size:

API Response:

I am using retofit service without using callback. So, its probably going with Kotlin Coroutine suspend fun. I referred many blogs, mediums and so many tutorials. Well this is easy to get response using coroutine scope with IO and Main thread.

So, after referring some examples I am considers to do code like this:

Restrofit Service Interface RetrofitInterfaces.kt:

I have ViewPager with 200+ tabs. Every tab includes recyclerview with dynamically loading data via retrofit2. Data are loading after every onTabSelected() action.

But because of viewpager loading position-1 (if any), position, position+1 (if any) I am getting 2-3 tabs with identical data.

The question is - how can I load only one fragment that is currently selected without neighbor positions?

I've thought that BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT in my FragmentPagerAdapter will solve my issue by simply passing it to the constructor:

I have an iOS app and now I am porting it to the Android with Kotlin. But I stucked in very simple case. There is an EditText in a Fragment and I want to ask user does he/she wants to save before leaving the fragment if something had written to the EditText.

I can handle back button with OnBackPressedCallback and handleOnBackPressed and show user the AlertDialog but fragment closes without waiting the users answer. But I don't want this, isn't possible to wait user's answer and then popUpTo previous fragment? Because I have to save the text before the fragment close.

Here is my code