kotlinlang #android

@Dao
interface BottomBarIconDao {

    @Query("SELECT * FROM icons")
    fun getAll(): List<BottomBarIcon>

    @Query("DELETE FROM icons")
    fun deleteAll()

    @Insert
    fun insertAll(vararg icons: BottomBarIcon)
}

Vinicius Carvalho

09/24/2018, 1:53 PM

Hi all, I'm still struggling to get coroutines and http to play nice with android, Is it correct to assume that

launch

should happen at the UI context if we need to update any component from the UI, and any networking call should happen on a

CommonPool

context?

Vinicius Carvalho

09/24/2018, 1:53 PM

at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:180)
                      at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
                      at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:366)
                      at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
                      at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
                      at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
                      at com.microsoft.projectoxford.face.rest.WebServiceRequest.get(WebServiceRequest.java:102)
                      at com.microsoft.projectoxford.face.rest.WebServiceRequest.request(WebServiceRequest.java:78)
                      at com.microsoft.projectoxford.face.FaceServiceRestClient.listPersons(FaceServiceRestClient.java:605)
                      at com.microsoft.projectoxford.face.FaceServiceRestClient.listPersons(FaceServiceRestClient.java:623)
                      at io.igx.lego.MainActivity$onCreate$1$1.doResume(MainActivity.kt:54)
                      at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume(CoroutineImpl.kt:42)
                      at kotlinx.coroutines.experimental.DispatchedTask$DefaultImpls.run(Dispatched.kt:149)
                      at kotlinx.coroutines.experimental.DispatchedContinuation.run(Dispatched.kt:13)
                      at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1412)
                      at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:285)
                      at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1152)
                      at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1990)
                      at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1938)
                      at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

Vinicius Carvalho

09/24/2018, 1:54 PM

cameraSource.takePicture({}, { bytes -> detectFaces(bytes) })
fun detectFaces(bytes: ByteArray) {
            launch(CommonPool) {

                    val faces = facesClient.detect(bytes.inputStream(), true, false, arrayOf(FaceServiceClient.FaceAttributeType.Age))
                    val results = facesClient.identity("family", faces.map { it.faceId }.toTypedArray(), 4)
                    results.forEach { r ->
                        val name = personMap[r.candidates[0].personId.toString()]
                        Log.i(TAG,"Found $name")
                    }

            }
        }

Daniel

09/25/2018, 9:13 AM

Might be kotlin related: In Android Studio 3.2 running all kotlin unit tests results in an empty test suite when run for the first time after a code change. The second run finds those tests. Does anybody experienced this too?

jurajsolarml

09/25/2018, 10:41 AM

Hello, I'm a beginner. I've upgraded the AS to 3.2.Kotlin 1.2.71. API 28 and I report an error: No cached version of com.android.tools.build:aapt2:3.2.0-4818971 available for offline mode. Where can be a mistake? Thank you

morozov

09/25/2018, 12:00 PM

Who can help with implementation of

glide

? Right now i get next error in my logs:

Load failed for <https://upload.wikimedia.org/wikipedia/sco/7/71/Pringles.svg> with size [65x66]
         class com.bumptech.glide.load.engine.GlideException: Failed to load resource

:stackoverflow: 2

09/25/2018, 2:18 PM

Did anyone done the update ? Few friends got some troubles 😬

kenkyee

09/25/2018, 3:27 PM

Android Studio 3.2 works fine...be sure to use Kotlin 1.2.71 (avoid .70) or below

dan.the.man

09/25/2018, 5:12 PM

So updating from Kotlin 1.2.60 to 1.2.71, I have a Java class that implements a Java Interface but I'm getting

e: Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:

For my java class, but if I downgrade to 1.2.60 I'm not seeing this error. Anyone seen something like this?

veer

09/26/2018, 12:03 PM

Hi All, am getting the below error when trying to add databinding with kotlin in my project, :app:transformDataBindingWithDataBindingMergeArtifactsForDebug :app:kaptDebugKotlin FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ‘:app:kaptDebugKotlin’.

There was a failure while executing work items

> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptExecution > java.lang.reflect.InvocationTargetException (no error message) Note: am trying to enable dataBindind for kotlin in a legacy code which already has Databinding using java, have applied apply plugin: ‘kotlin-kapt’ kapt “com.android.databinding:compiler:3.1.4” please help

rkeazor

09/26/2018, 4:22 PM

@ribesg you have to make sure you remove all reference of the support library In your XML. Also if you 3 party dependencies, that use android support, it at times creates a conflict

matt tighe

09/26/2018, 6:05 PM

slightly off-topic, but i accidentally turned on editor type annotations in android studio as was hoping someone could tell me how to turn them back off

Hong

09/26/2018, 7:00 PM

The question is what features do you use from Realm?

jurajsolarml

09/27/2018, 7:19 AM

Hello,please help.I have new a bug.I've upgraded the AS to 3.2.Kotlin 1.2.71. API 28.How can I fix it? Thanks Gradle DSL method not found: 'compileSdkVersion()' Possible causes:<ul><li>The project 'Old_error_cardview' may be using a version of the Android Gradle plug-in that does not contain the method (e.g. 'testCompile' was added in 1.1.0). Upgrade plugin to version 3.2.0 and sync project</li><li>The project 'Old_error_cardview' may be using a version of Gradle that does not contain the method. Open Gradle wrapper file</li><li>The build file may be missing a Gradle plugin. Apply Gradle plugin</li>

Tsvetozar Bonev

09/27/2018, 7:55 AM

Does #tornadofx work on android and will I be able to keep one code base for both desktop and android with it?

ribesg

09/27/2018, 11:17 AM

Which version of the Kotlin stdlib are you supposed to use for Android?

voddan

09/27/2018, 12:40 PM

Hello! I started getting

Cannot change dependencies of configuration ':app:debugCompile' after it has been included in dependency resolution

after I added kotlin serialization. It goes away if I comment out

apply plugin: 'com.google.gms.google-services'

. What can it be?

Allan Wang

09/27/2018, 1:50 PM

For an activity I have, I want to clean up some files upon on destroy. Would it be better to keep that in a service, or would using coroutines be good enough? The task should be independent of the activity lifecycle, and does not depend on context.

jurajsolarml

09/27/2018, 3:54 PM

Hello. I have bugs.. Please help. Thanks https://hastebin.com/uhafilazuq.bash startup failed: build file 'D:\Workspace\ZALOHA\Old_error_cardview\app\build.gradle': 8: only id(String) method calls allowed in plugins {} script block See https://docs.gradle.org/4.10.2/userguide/plugins.html#sec:plugins_block for information on the plugins {} block @ line 8, column 5. android { ^ 1 error Open File

neuber

09/27/2018, 7:20 PM

Hi, Can anyone help?

:stackoverflow: 4

Allan Wang

09/27/2018, 11:45 PM

Is there no way to suppress the following error?

Enum entry name '_****' should start with an uppercase letter

I tried

@Suppress("ALL")

for both the name and the entire enum class

lawlorslaw

09/28/2018, 2:54 AM

I created an extension function for rxjava2's Observable class. How do you invoke an extension function from Java code?

muralimohan962

09/28/2018, 7:10 AM

Is there any material theme editor for android?

Tudor Luca

09/28/2018, 8:42 PM

I started a new feature with it 🤷‍♂️🏻🤞😅

sfloamfw

09/28/2018, 10:28 PM

Hi All, I am trying to use kotlin2js in Android Studio. I currently have in my project’s build.gradle:

apply plugin: 'kotlin2js'

compileKotlin2Js {
        kotlinOptions.outputFile = "${projectDir}/build/js/module.js"
        kotlinOptions.moduleKind = "umd"
        kotlinOptions.sourceMap = true
    }

as well as other configurations. When I compile my project, I do not see any .js files generated. Does anyone have any ideas as to why?

muralimohan962

09/29/2018, 12:55 PM

The ui designer is not working. Is there any problem with my dependencies?

:stackoverflow: 2

:google: 2

neuber

09/29/2018, 5:03 PM

I stay trying my project based on this: http://nilhcem.com/android-things/arduino-as-an-i2c-slave

Icaro Temponi

09/30/2018, 3:49 PM

Hi everyone, just would like to ask which one is better to use when inside a Coroutine Context in a background Pool to run an operation on the UI Thead: Handler(Looper.getMainLooper()).post{ /* running on UI here */ } or launch(UI) { /* running on UI here */ } I'm maintaining a library with a lot of calls to the UI and don't know which to choose

Title

Icaro Temponi

09/30/2018, 3:49 PM

gildor

09/30/2018, 4:10 PM

Sure, use coroutine dispatcher

But UI is deprecated, use Dispatchers.Main Also, probably you don't need

launch

, just

withContext

, but it depends on your case

Icaro Temponi

09/30/2018, 4:12 PM

I see, thx, i'll start to use it 🙂

Is it safe to swap all my Handler post usages to Main dispatcher? I'm wanting to use it as a standard

gildor

09/30/2018, 11:17 PM

Should be safe, I don’t see any potential issues. But if you have some problems with it just report an issue

Icaro Temponi

10/01/2018, 2:57 AM

Ok, thx, I started to use only coroutines dispatchers everywhere and they are doing really well, coroutines are really awesome.

gildor

10/01/2018, 3:35 AM

@Icaro Temponi Just in case, if didn’t read “Coroutines Guide to UI programming” yet, I highly recommend to do that: https://github.com/Kotlin/kotlinx.coroutines/blob/master/ui/coroutines-guide-ui.md

View count: 1