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.mail> or val mailsByUser: Map<String, List<Email>> I fail in the last step –
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 the failing test:
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 the same object provided by the InstanceCreator, so it’s not creating a new
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 this but I have only been able to do
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. Also, in the MainActivity file, I am facing some errors :- e: /Users/yash/AndroidStudioProjects/VideoPlayer/android/app/src/main/kotlin/dev/jideguru/filex/MainActivity.kt: (26,
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 Emulator shows following error when you run it in Android Studio on
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 confusion and difficulty in terms of how it works. These is my implementation Normally we could just
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.kotlin_version = ‘1.5.0-M1’ I added this version below from
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 kinds of spaces with different widths: →← –