kotlinlang #android

Hi guys n00b question. What would be the best/right practice to have two viewModels talking each other. I have an object in the viewModelA and I need the ID in the viewModelB to have it on my request Any recommendation?

Joshua

09/05/2020, 2:40 PM

This is really strange... So i created a drawable resource file to create corner radius for my button.. If I set the background property to that file I get the corner radius as I want.. however, the background tint is being overwritten by the background property? So I can't set a background color of the button... any idea how to fix this

Christopher Elías

09/05/2020, 7:25 PM

Question, how does gradle system work? I am working on a modularized project, What happens when Two Modules contain the same library like... Core Module A and Core Module B both have the android support library, and this core Modules are implemented on a Feature module, this feature module download the support library twice? Or somehow gradle know about it and just download that library once?

mohamadreza jafarzade

09/06/2020, 11:19 AM

Hi I have activity A that contains fragment x. then I open fragment y from it. then I open Activity B from fragment y. When i press back from Activity B, it opens fragment y. Is there anyway to open fragment x when i press back from Activity B? i thought that not setting

addToBackstack()

would help me but it is only responsible for previous fragment not the new one.

manlan

09/07/2020, 10:56 AM

I have to implement the same screen, as a bottom sheet at one place and as a normal fragment in a viewpager at a different place. If I extend BottomSheetDialogFragment for the first case, I cannot use it as a normal fragment in the other case. Any suggestions so I can avoid duplicate logic/classes?

Rafal

09/07/2020, 1:39 PM

https://android-developers.googleblog.com/2020/09/prefer-storing-data-with-jetpack.html With the new DataStore library, it makes me wonder - will incorporating first party support for coroutines in new jetpack libraries be the path Google wants to follow now? I mean, most of the time we had sidekick libraries for coroutines/rxjava support and now the DataStore api is built with

Flow

Ken Maffei

09/07/2020, 8:49 PM

I have a network call that gets LiveData. The LiveData is observed with my Fragment's lifecycle owner. Does the coroutine call I make also need to be scoped to the fragment's lifecycleowner? In other words should I use one of these, or does it not matter?

CoroutineScope(<http://Dispatchers.IO|Dispatchers.IO>).launch

or fragment.lifecycleScope.launch(context = Dispatchers.IO)

Sudhir Singh Khanger

09/08/2020, 3:58 AM

I am using Flow to fetch a list of some objects from the API. I collect in the ViewModel inside a viewModelScope which is then pushed to the UI via a LiveData. I am also supposed to filter this list based on a query. Should I filter at the flow level in the repository or should I filter in the ViewModel once it has been collected and let filtering be part of LiveData instead of flow.

Slackbot

09/08/2020, 12:21 PM

This message was deleted.

droid

09/08/2020, 2:53 PM

Is there recommended way of doing Boolean object comparison in Kotlin? e.g.

if(Boolean.TRUE == someBooleanValue) { .. } else { .. }

, this example is using

Boolean.TRUE

from Java and android studio is giving lint warning:

Slackbot

09/08/2020, 7:30 PM

This message was deleted.

Afzal Najam

09/09/2020, 2:59 AM

Does Android Studio not support the Coroutines tab in the debugger? Not seeing it on AS 4.2 Canary 10 with Kotlin 1.4.0

:yes: 1

Will Nixon

09/09/2020, 1:04 PM

Hi all - is the generated Keystore file meant to have an extension like .jks or .keystore? At the moment, I just see a simple file named keystore with no extension or anything. For context: trying to use Fastlane to sign, build, and deploy aab for internal testing, but keep getting an error and wondering if it might be to do with the keystore pathing

Users/wnixon/keystore

:google: 2

tseisel

09/10/2020, 6:57 AM

Has anyone here already used the new Dagger Hilt library ? Is it stable enough for use in production ? Does it really simplify config for dependency management ?

:google: 6

iBehnia

09/10/2020, 11:24 AM

Hi I have a question How to create cardview with blur background?

:google: 2

tylerwilson

09/10/2020, 4:05 PM

Any known risks or issues using Kotlin useIR flag on JVM/Android?

Afzal Najam

09/10/2020, 8:10 PM

Is putting

okhttpclient.newCall(request).execute()

inside a coroutine going to cause any problems, as compared to calling

enqueue

wrapped around a

suspendCancellableCoroutine

Sam

09/11/2020, 5:44 AM

Good day you guys, I have some debate about MVVM with my team/friends with 2 points: 1. Must use Databinding in XML to following architecture MVVM + databinding : Example :

<data>
       <variable name="user" type="com.example.User"/>
   </data>

2. We should build XML to be pure , it mean does not include code because easier to management. debug, troubleshoot (Kotlin file for code and XML for UI). we should use

Databinding

for binding view to safety-reference. we still achieve the MVVM. How do you think about these points? Thanks.

Kate Galeru

09/11/2020, 10:01 AM

Hi all, What would be a good solution to implement a screen like google play store? My current screen has a vertical list and each item in the list contains a horizontal scrollable list. I implementing a nested RecyclerView, but the performance isn't great, the vertical scroll is lagging. What would be a better solution to keep in mind the performance? Thanks!

:stackoverflow: 3

dan.the.man

09/11/2020, 8:13 PM

Anyone see this error?

java.lang.IllegalStateException: Unexpected non-class file: META-INF/versions/9/kotlin/reflect

When upgrading from Kotlin 1.3.72 to 1.4.10 It appears to be related to the Android Gradle plugin, any fixes other than going to an RC version? https://github.com/firebase/firebase-android-sdk/issues/1888

Ian Arbuckle

09/12/2020, 11:50 AM

Hey guys would appreciate any pointers in the right direction. I'm migrating an Android gradle build script to Kotlin. I extract a build time property from

local.properties

using groovy.

def properties = new Properties()
properties.load(properties.rootProject.file("local.properties).newDataInputStream()
def key = properties.getProperties("google.map.key")

Does anyone know how to replace it with the

gradleLocalProperties

DSL or any documentation on this?

gabrielfv

09/12/2020, 2:42 PM

Does anybody know if it’s possible to extend

@Parcelize

? I mean, I want to easily parcel

com.google.gson.JsonObject

, but it can’t be marshalled via simply

@RawValue

. I wanted to add a piece of code that translates it into

String

than back to

JsonObject

so that I can use

@Parcelize

with it. I can’t translate it into an specific class because it’s a dynamic field.

Sourabh Rawat

09/12/2020, 3:11 PM

Any good tutorial on understanding the android material palette? I get confused by primaryVariant vs primaryLight/Dark etc.

:google: 2

Mehul Kabaria

09/13/2020, 6:28 AM

I want to create chatting application same like WhatsApp provides feature with video and audio calling. Any customized SDK available that give above all features. Your help would be appreciated.

👨‍🎓 1

:stackoverflow: 2

:google: 5

Joshua

09/13/2020, 12:08 PM

Can anyone please tell me why the include tag wont show up when I run the app?? This drives me crazy.

<FrameLayout xmlns:android="<http://schemas.android.com/apk/res/android>"
    xmlns:app="<http://schemas.android.com/apk/res-auto>"
    xmlns:tools="<http://schemas.android.com/tools>"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ProductGridFragment">

    <LinearLayout
        style="@style/Widget.Shrine.Backdrop"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal"
        android:orientation="vertical"
        android:paddingTop="100dp"
        android:paddingBottom="100dp">

        <include layout="@layout/shr_backdrop"/>

    </LinearLayout>

Here is the shr_backdrop xml:

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="<http://schemas.android.com/apk/res/android>">

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_featured_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_apartment_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_accessories_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_shoes_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_tops_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_bottoms_label"/>

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_dresses_label"/>

    <View
        android:layout_width="56dp"
        android:layout_height="1dp"
        android:layout_margin="16dp"
        android:background="?android:attr/textColorPrimary" />

    <com.google.android.material.button.MaterialButton
        style="@style/Widget.Shrine.Button.TextButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/shr_account_label" />

</merge>

:stackoverflow: 7

:google: 7

Karunkumar2023

09/14/2020, 7:24 AM

Hi everyone..please help me. how to upload apk to play store that is having more than 100MB size?

:stackoverflow: 6

:google: 5

L.C

09/14/2020, 9:25 AM

Hi everyone, this is my first time posting here, I am wondering if anyone know the issue with dokka HTML generation. When I was running dikkaHtml Gradle task in Android Studio (4.2 canary 10 ) terminal,

./gradlew dokkaHtml

it failed with the following exception.

javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

I thought it had something to do with the Java version(1.8.0_261) or no JAVA_HOME set, after attempting to set JAVA_HOME, the problem still happened. I am wondering anyone know of this issue and how to work around it? Thanks in advance!

shusek

09/14/2020, 4:25 PM

Hi, i got really weird error inside android studio 4.0.1 with kotlin 1.4.10. I am not sure if it bug from android lint and where i should report it. In the example below code works normally but android linter return error with message

Error: Expected non-nullable value [NullSafeMutableLiveData] androidSingleEvent.value = validationError

. Probably some lint check from library

androidx.lifecycle:lifecycle-*:2.3.0-alpha07

is invalid. Funfact: when i change

validationError

(validationError)

linter passes without problem.

class TestClass {
    val androidSingleEvent = MutableLiveData<String>()

    fun test() {
        val nullableText = getNullableText(true)
        if (nullableText != null) {
            androidSingleEvent.value = nullableText
        }
    }

    private fun getNullableText(returnNull: Boolean): String? {
        return if (returnNull) {
            null
        } else {
            ""
        }
    }
}

pollux-

09/14/2020, 11:01 PM

I have a pre packages SQL database. Which has couple of Boolean fields. When I import that DB using Room it's throwing an error staying Pre packaged database has invalid schema I'm guessing problem is that, DB has boolen field type but Room table we can't have Boolean its being used and Integer field. How can I solve this??

Title

pollux-

09/14/2020, 11:01 PM

Ian Lake

09/15/2020, 12:13 AM

The only option is to fix your database to use the same schema that Room expects. You can copy the create table statement out of the schema file that Room generated

pollux-

09/15/2020, 1:43 AM

@Ian Lake thank you for your time. This DB file I'm downloading from remote location which has Boolen fields in it. Unfortunately, I can control the schema of the DB that I receive. You mean to say, there is no fix for the issue I'm facing.

Caused by: java.lang.IllegalStateException: Pre-packaged database has an invalid schema: facility(org.kp.m.dashboard.home.data.geofencing.model.Facility).
09-14 18:40:03.805  979  979 E AndroidRuntime: Expected:
09-14 18:40:03.805  979  979 E AndroidRuntime: TableInfo{name='facility', columns={zip=Column{name='zip', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, afterHoursInd=Column{name='afterHoursInd', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, isPreferedFacility=Column{name='isPreferedFacility', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasEmergencyServices=Column{name='hasEmergencyServices', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, city=Column{name='city', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, timezone=Column{name='timezone', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, latitude=Column{name='latitude', type='REAL', affinity='4', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasByAppointment=Column{name='hasByAppointment', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, cpmFacilityId=Column{name='cpmFacilityId', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hospitalInd=Column{name='hospitalInd', type='INTEGER', affinity='3', notNull=true, primaryKeyPosition=0, defaultValue='null'}, facilityDescription=Column{name='facilityDescription', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, street=Column{name='street', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, name=Column{name='name', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, ncalInd=Column{name='ncalInd', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, affiliateInd=Column{name='affiliateInd', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, isHospital=Column{name='isHospital', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasWalkInCare=Column{name='hasWalkInCare', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, _id=Column{name='_id', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=1, defaultValue='null'}, state=Column{name='state', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, region=Column{name='region', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasAfterHoursCare=Column{name='hasAfterHoursCare', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=0, defaultValue='null'}, spotlightKey=Column{name='spotlightKey', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, formattedHours=Column{name='formattedHours', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, longitude=Column{name='longitude', type='REAL', affinity='4', notNull=false, primaryKeyPosition=0, defaultValue='null'}}, foreignKeys=[], indices=[]}
09-14 18:40:03.805  979  979 E AndroidRuntime: Found:
09-14 18:40:03.806  979  979 E AndroidRuntime: TableInfo{name='facility', columns={afterHoursInd=Column{name='afterHoursInd', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, isPreferedFacility=Column{name='isPreferedFacility', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, city=Column{name='city', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, timezone=Column{name='timezone', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, latitude=Column{name='latitude', type='REAL', affinity='4', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasByAppointment=Column{name='hasByAppointment', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, cpmFacilityId=Column{name='cpmFacilityId', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, street=Column{name='street', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, affiliateInd=Column{name='affiliateInd', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, isHospital=Column{name='isHospital', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasWalkInCare=Column{name='hasWalkInCare', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, state=Column{name='state', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasAfterHoursCare=Column{name='hasAfterHoursCare', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, formattedHours=Column{name='formattedHours', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, longitude=Column{name='longitude', type='REAL', affinity='4', notNull=false, primaryKeyPosition=0, defaultValue='null'}, zip=Column{name='zip', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasUrgentCare=Column{name='hasUrgentCare', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hasEmergencyServices=Column{name='hasEmergencyServices', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, hospitalInd=Column{name='hospitalInd', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, facilityDescription=Column{name='facilityDescription', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, name=Column{name='name', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, ncalInd=Column{name='ncalInd', type='BOOLEAN', affinity='1', notNull=false, primaryKeyPosition=0, defaultValue='null'}, _id=Column{name='_id', type='INTEGER', affinity='3', notNull=false, primaryKeyPosition=1, defaultValue='null'}, region=Column{name='region', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}, spotlightKey=Column{name='spotlightKey', type='TEXT', affinity='2', notNull=false, primaryKeyPosition=0, defaultValue='null'}}, foreignKeys=[], indices=[]}

This is the exception I'm getting 🙄🙄

Ian Lake

09/15/2020, 1:46 AM

Your schema needs to match exactly

🙄 1

Colton Idle

09/15/2020, 2:42 AM

@pollux- the data seems simple enough. Can you just download it and insert it into the database instead? If you don't control it, I don't think there is much you can do like Ian said.

pollux-

09/15/2020, 2:59 AM

@Colton Idle 🙏

Thanks guys ✌️ @Colton Idle @Ian Lake

@Colton Idle @Ian Lake I had changed the type matching the SQL lite type and problem solved .. Thanks a lot

👍 2

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