Disclaimer: It's not really Kotlin related, be lenient. I have a multi module project with some android library modules. I want to reuse the modules in other projects but currently none of them are pushed to git or published to a maven repository. I know it's possible to publish the modules to a maven repository within the main project but I'm wondering what I can do to have each module in git as single project so I can develop each module in isolation. The only solution I'm aware of is to create a new project for every module I want to have as a single project and copy the specific source files over. Is there a shorter way of doing this?

I use java.util.Base64.getEncoder() in Kotlin, but on below of Nougat versions doesn't work. I get this error on below of Nougat versions "Failed resolution of: Ljava/util/Base64"

Can someone please help me with this? https://stackoverflow.com/questions/68511430/jackson-serialisation-fails-by-throwing-kotlinreflectioninternalerror-when-seria

What happens when a

View

is in

GONE

state and

LiveData

is supposed to set value on it? Does

LiveData

do anything or skip setting value or does it set it but since the view is gone we won't be able to see changes?

In many android projects, I observed

kotin stdlib

dependency is added in the Gradle files. I also observed 

kotlin

 and 

kotlin-android

 plugin also adds it by default. I am assuming adding it manually can be avoided? Or is there a downside to it?

org.jetbrains.kotlin:kotlin-stdlib:${versions.kotlin}

Also, I believe

android {
  ...
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }

  kotlinOptions {
    jvmTarget = "1.8"
  }
}

compileOptions

can be safely dropped from 100% kotlin application. Using

kotlinOptions.jvmTarget="11"

is there a downside to it, in terms of byte-code generation and byte-code compatibility with other jdk versions.

Anyone?

how do I set

lintOptions {
        isAbortOnError = false
    }

In AGP 7.0.0-alpha01 using kotlin-dsl? The above snipet works with AGP 4.1.3, it fails when upgraded to 7.0.0

Hi 👋 Updating kotlin to 1.5.0 I get this error

java.lang.NoSuchMethodError: No static method getSeconds(I)D in class Lkotlin/time/DurationKt; or its super classes (declaration of 'kotlin.time.DurationKt'

I removed the

kotlin-stdlib

explicit declaration but the error is still here. I appreciate any help

In Android projects we don’t apply the

java

plugin , do we have something similar to

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(11)
        vendor = JvmVendorSpec.ADOPTOPENJDK
    }
}

In the AGP or kotlin plugin ?

With HILT being publicly endorsed by google as the recommended DI framework, and dagger getting some key new features this year like assisted injection. Is there any reason to continue using Koin / Kodein for android? If you have multiplatform ambitions for your existing codebase, how might you approach DI?

[Jetpack Proto DataStore]

Is there any option to generate kotlin instead of Java-lite on the gradle plugin? The java option does not use nullable annotation so I find it a bit error-prone to consume from kotlin for new devs.

protobuf {
  protoc {
    artifact = 'com.google.protobuf:protoc:3.8.0'
  }
  generateProtoTasks {
    all().each { task ->
      task.builtins {
        java {
          option "lite"
        }
      }
    }
  }
}

Hi all, I have a general query to ask for Activity Contract API. Is there any way, we can write custom Contracts for 3rd Party Libraries that still uses

startActivityForResult

and overrides

onActivityResult

. I am using Google Pay Wallet SDK and it has a function which simply accepts request code and internally calls

startActivityForResult

. Can I do something at my end to make the code more modular using ActivityContracts? Attaching sample code in thread.

Hi everyone, I heard that Jetpack compose was released 1.0 version. It's really great, but someone can tell me how can I create recyclerview with flexboxLayoutManager by jetpack compose. Thanks you all, have a nice day

In Android development, how can I get the cover of the music being played by a third-party music player?

Hey guys, I'm considering using ktor for rest client, instead of Retrofit. Do you mind sharing any opinions on that topic? I'm also interested in unit testing.

Hi i want to passing this kotlin argument only for my unit test build

kotlinOptions {
    freeCompilerArgs += [
            '-Xsam-conversions=class',
    ]
}

Any one have clue how i can achieve it ? Thank you in advance

Hey I want to convert cm to feet. i create the logic it's working fine, but problem is if i enter 152 cm it convert into 4'12", i don't want to show like that. instead i want to show 5 foot.

private fun cmToFeet(value: String): String {
    var text = ""
    val cm = value.toDouble()
    val feet = floor((cm / 2.54) / 12)
    val inches = round((cm / 2.54) - (feet * 12))
    if (feet > 0 && feet < 10) {
        text = "${feet.toInt()}'"
        if (inches > 0) {
            text += "${inches.toInt()}\""
        }
    }
    return text
}

hi ,i meet some trouble . how can i record a video in my android app, or record a video in the CustomView ??

can anyone suggest best way to modularize an app which is currently developing, like which which sections can be separated?

Hi guys, I'm not sure if this is the right place. I submitted an aab file on Play Store for a major update. This was my first aab upload, but users can't download or update my app from the App Store. I'm not sure what went wrong. On Play Store console it indicated that the rollout was good and full. Thank you! Anyone have similar questions experience?

Hello guys, does someone else is going through this kind of issue? the IDE seems to not recognize the imports (Jetchat from the Google Compose samples) on the new Android Arctic Fox. It show the highlight as error but when hit compile & run it deploys to the emulator/connected device with no problems.

Hi Everyone, I'm Precious and I'm totally new to Kotlin and software development in general. I recently got a scholarship from Google to study Android development and I'll want to use the opportunity to up skill as much as possible. So I put together a community and a challenge for people who are totally new to Kotlin and are interested in spending the next 31 day to learn the basics of the language. Clearly, most people in this community have been using Kotlin for a long, long time and may want to offer a hand as mentors. If this is your thing, please feel free to message me here bit.ly/Hi-Precious I will be eternally grateful if you do. P.S Hopefully this does not go against any community rules, but if it does, I'm very sorry and will happily take it down on first prompt. Cheers.

This class which basically does validation on input fields. Using 

LiveData

 to how can i convert the 

MediatorLiveData

 part to 

StateFlow

import androidx.lifecycle.LiveData
import androidx.lifecycle.MediatorLiveData
import androidx.lifecycle.MutableLiveData

abstract class InputFrom {
    private val _isFromValid = MediatorLiveData<Boolean>()
    val isFromValid: LiveData<Boolean>
        get() = _isFromValid

    abstract val fields: List<LiveInputField<*>>

    fun init() {
        fields.forEach { inputField ->
            _isFromValid.addSource(inputField.value) { changedValue ->
                inputField.validate(changedValue)
                _isFromValid.value = fields.all {
                    it.isValid
                }
            }
        }
    }

    inner class LiveInputField<T>(
        private val errorMessage: String? = null,
        private val predicate: (T?) -> Boolean
    ) {

        val value = MutableLiveData<T>()

        private val _error = MutableLiveData<String>()
        val errorText: LiveData<String>
            get() = _error

        var isValid: Boolean = false

        fun validate(value: Any?) {
            @Suppress("UNCHECKED_CAST")
            return if (predicate(value as? T)) {
                _error.value = null
                isValid = true
            } else {
                _error.value = errorMessage
                isValid = false
            }
        }
    }
}

Example Usages:

class LoginFrom : InputFrom() {

    val username =
        LiveInputField<String>("At least 4 characters, only letters, numbers, ., _ allowed.") {
            !it.isNullOrBlank() &&
                Pattern.compile("[a-zA-Z0-9_.]{4,}")
                    .matcher(it)
                    .matches()
        }

    val password =
        LiveInputField<String>(
            "8 characters or more, at least one number, one uppercase, one lowercase."
        ) {
            !it.isNullOrBlank()/* &&
          Pattern.compile("((?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{8,})")
              .matcher(it)
              .matches()*/
        }

    override val fields: List<LiveInputField<*>>
        get() = listOf(
            username,
            password
        )
}

Hello, how can we pass EditText's value to another class (not activity/fragment) using MVVM?

Hello Everyone, I am getting an issue with Kotlin Hilt Here's what I am doing right now, I have made one test class and needs to be injected in view model, Also wrote provides in component module. Now I am injecting it in a viewmodel via @inject lateinit var test:TestInterface, now when I am trying to use the variable test, it gives the lateinit var has not initialized , can anyone suggest what is missing ?

Any easy way to know, which is the current displayed fragment from android studio? I can get the activity name from profiler, but finding it hard time with fragment.

ViewCompat.setOnApplyWindowInsetsListener(this) { _, windowInsets ->
    val statusBarInsets = windowInsets.getInsets(WindowInsetsCompat.Type.statusBars())
    val statusBarHeight: Int = <http://statusBarInsets.top|statusBarInsets.top>
}

Does anyone knows, why I’m I getting statusBar height as zero, this will be called multiple times, sometimes I see the actual height of the status bar but sometimes it does reset to zero. Appreciate your help

Type inference failed, how to fix?

Hi guys. I have an android sdk project that I upload to Github packages using maven plugin for Android Studio. Is there any way to not publish the sources.jar? I want my source code to remain hidden for the SDK consumers… This is my gradle part

publishing {
    repositories {
       
        maven {
            name = "GithubPackages"
            url = uri("<https://maven.pkg.github.com/>...")
            credentials {
                username = "..."
                password = "..."
            }
        }
    }
}