I have a wrapper that may or may not contain data: I group one user to multiple contacts: It groups val mailsByUser: Map<String, List<EmailAdapter>> I want to group all emails to a unique user I want to unwrap the EmailAdapter so that the relation is EmailAdapter.user -> List<EmailAdapter.ma…
Tag: kotlin
How to make BigDecimal division more precise
I’m having an issue with BigDecimals, the simplified idea is to: define a value for the total split the total in 3 parts defined by weights, these weights are 3 double values that add up to 100.0 sum up the parts the sum should be close to the total, the error should be at most 0.00000001 Here’s t…
In Kotlin, how does GSON.fromJson(…) manage to mutate a read-only field of an existing object?
In Kotlin, how can an instance’s read-only val field be mutated? In the following Kotlin code, gson.fromJson(…) gets a Thing(0) from the InstanceCreator and somehow manages to mutate value from 0 to 1, then return that object. How? I verified that the object returned by gson.fromJson(…) is t…
Combine two lists by ID
I have two lists of objects with contents that look like this: I can’t come up with anything good to “merge” these two lists overriding the nulls. The ideal end result would be: I’ve been looking into Kotlin collections to see if there’s anything that would help me get closer to …
Issue in Native Ad Flutter using google_mobile_sdk
I want to monetise my Flutter app using google_mobile_ads library with Native ads. I am facing some issues while facing this documentation – https://developers.google.com/admob/flutter/native I am not sure where to put the my_native_ad.xml file so that it can be referred by the Kotlin Main Activity File…
AM Emulator: Library vulkan-1.dll: failed for handleCPUAcceleration [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 1 year ago. Improve this question The Em…
Issue on implementing ViewPager2 with FragmentStateAdapter
I am from ViewPager with FragmentPagerAdapter which has a very straight forward implementation like this. Parent Fragment Android recommends moving away from ViewPager and deprecating the beloved FragmentPagerAdapter, now I am trying to work with ViewPager2 with FragmentStateAdapter but having a lot of confus…
video streaming on Fragment of an android app
i want to stream a video from the firebase storage, in a fragment of my android app. but what even i try my video doesn’t launch or the app crash when i request the fragment. being a beginner, i have followed a tuto so i used exoplayer. this is my fragment code: in addiction with : And the xml file
Class ‘kotlin.reflect.KClass’ is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler
After I converted my java code to Kotlin. There is an issue in this code ViewModelContactUs::class.java in this code part java is in red and does not work and says Returns a Java Class instance corresponding to the given KClass instance. Answer I removed this version below from my app/build/gradle file ext.ko…
How do I change the distance between words?
How can I change the distance between words in a string in Android Studio using the methods? I need the distance to be about half the size of the standard space. as I understand it, after BackgroundColorSpan(Color.BLACK), you can add a parameter to change the distance between words. Answer There are different…