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android

Nizzle94

01/23/2018, 2:21 AM

I mean mixed codes. My team leader does not agree with me for writing mixed Java and Kotlin. He wants only Java or Kotlin.

hmole

01/23/2018, 7:53 AM

For some reason it doesn't work with boolean type.

Scott

01/23/2018, 7:54 AM

Cool, 👍

Paul Woitaschek

01/23/2018, 9:37 AM

Am I right with the assumption that sealed classes are not supported by

@Parcelize

nickk

01/23/2018, 11:28 AM

I’m trying to find the valid values I can pass to

@Suppress

. Is there a list somewhere?

01/23/2018, 5:18 PM

https://kotlinlang.org/docs/reference/extensions.html

kirillrakhman

01/24/2018, 9:12 AM

I'm getting

Warning:Configuration 'compile' is obsolete and has been replaced with 'implementation'. It will be removed at the end of 2018

I don't have any

compile

dependencies anymore. Could it be the Kotlin plugin that causes the warning?

Ayden

01/24/2018, 2:48 PM

I thought Vector Drawable Animation is also a part of Android?

eyal

01/24/2018, 3:27 PM

Here is the Robolectric code causing problem: https://github.com/robolectric/robolectric/blob/6fa38fc48242cbdcb08b54f4bd5b5a0a8dbee6f2/robolectric/src/main/java/org/robolectric/ParameterizedRobolectricTestRunner.java#L153 This is throwing a ClassCastException

tgmcians

01/24/2018, 6:40 PM

I am getting an error

this class implements parcelable but does not provide a creator field

temp_man

01/24/2018, 11:23 PM

Hey everyone, I have a question I can not seem to find an answer to. If I have a background function that sends updates to my activity, how can I constantly send those updates to the UI of a fragment? I know you can do this with onCreate but I need to keep a constant flow of updates. Hope that makes sense.

:stackoverflow: 2

Nizzle94

01/25/2018, 8:22 AM

Hello everyone. I have question about. Kotlin and room.

magicleon

01/25/2018, 6:45 PM

Hi everyone, I’m new here. Where can I start to learn Kotlin for Android Developement? I come from Java

yasir-ameen

01/27/2018, 7:07 AM

How do i write in kotlin : someFuncName(Activity mAct, Class<?> cls) { ... } real question is that how to write a second parameter in kotlin "Cass<?> cls"

Joe

01/27/2018, 1:30 PM

Ah yes, that was to wrapper Ankologger functionality:

interface Logger : AnkoLogger

zkeme

01/27/2018, 3:45 PM

on another topic.. how is the general feeling towards Kotlin coroutines? Is it stable enough for production?

Loránd

01/28/2018, 3:16 PM

Hello, just wondering is there any way i can lock a property in kotlin when modifying it so i dont get concurrent modification?

kenkyee

01/28/2018, 5:52 PM

That's what the presentations contained though...

noone

01/28/2018, 7:38 PM

I’m looking for a good open source android project that uses kotlin. I want to look at the code and learn from it.

oday

01/29/2018, 10:19 AM

I see that Lists don’t implement Serializable

Aditya

01/29/2018, 12:47 PM

Can anyone one tell me what nullable means in Kotlin ???

01/30/2018, 12:00 AM

nullable

01/30/2018, 12:04 AM

it emits a null check automatically

Rick

01/30/2018, 4:39 AM

Does anyone know a good way to learn unit/instrumental testing? I am having a hard time trying to learn this. Second day studying and can't understand. It looks like a new language that I have to memorize. Could'nt find a good book or article that have this subject well explained. Any help/recomendation here?

aeruhxi

01/30/2018, 6:29 AM

Is it a normal practice to consider every parameter/variable coming from android framework nullable? I feel It's not ergonomic to deal with optionality everywhere even though some variables can never be null. Is there any cheeatsheet or anything I should read on to know which parameters can be null or not?

Aditya

01/30/2018, 7:56 AM

There is an underline under the Int as well why ???

Aditya

01/30/2018, 10:13 PM

Not yet

👎🏽 1

😂 2

Ayden

01/31/2018, 9:38 AM

Because when I tried to use the method above.

Ayden

01/31/2018, 9:43 AM

class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        loadFragment(new HomeFragment())

        BottomNavigationView navigation = findViewById(R.id.navigation)
        navigation.setOnNavigationItemSelectedListener(this)
    }

    ...

    fun onNavigationItemSelected(item: MenuItem?): Boolean {
        fragment: Fragment = null
        return true
    }
}

Kevin Janvier Chinabalire

01/31/2018, 10:08 AM

Hey guys i need a quick help here I have a model and i want to access the items outside a for loop

var model:User()
forEachIndexed { index, users ->{
println("my $users ")
}
println("I want to access my result outside for loop")

Title

Kevin Janvier Chinabalire

01/31/2018, 10:08 AM

Hey guys i need a quick help here I have a model and i want to access the items outside a for loop

var model:User()
forEachIndexed { index, users ->{
println("my $users ")
}
println("I want to access my result outside for loop")

edwardwongtl

01/31/2018, 10:20 AM

What kind of result do you want?

Kevin Janvier Chinabalire

01/31/2018, 10:22 AM

i want to get back the model result which match with like

println("Result $model")

... Not an arraylist

edwardwongtl

01/31/2018, 10:24 AM

Then what object does you actually looping?

Kevin Janvier Chinabalire

01/31/2018, 10:24 AM

Am looping into this arraylist

val arraylist = ArrayList<User>()

Example

val arraylist = ArrayList<User>()
var model:User()
forEachIndexed { index, users ->{
println("my $users ")
}
println("Result $model")

edwardwongtl

01/31/2018, 10:27 AM

I think you should be calling

arraylist.forEachIndexed

Kevin Janvier Chinabalire

01/31/2018, 10:28 AM

but i want the model

edwardwongtl

01/31/2018, 10:28 AM

And if you are looping the

ArrayList<User>

, then you can use

filter{}

to get the matches, or even

first {}

if you just need one result

Kevin Janvier Chinabalire

01/31/2018, 10:28 AM

i actually calling

arraylist.forEachIndexed

val arraylist = ArrayList<User>()
var model:User()
arraylist.forEachIndexed { index, users ->{
println("my $users ")

}

println("Result $model")

where i need help is to access that model ... which is not an arraylist model just a model like above

edwardwongtl

01/31/2018, 10:31 AM

If I didn't get it wrong, you want to set

var model

to the first one that matches some condition inside the

val arraylist

Kevin Janvier Chinabalire

01/31/2018, 10:33 AM

i want to access all the result after looping the array as

var model

which i declare up ...

to give u more clarity i have a `fun which i need to pass that

model

it cannot be an

array

edwardwongtl

01/31/2018, 10:35 AM

Can't you just call that

fun

inside the loop?

Kevin Janvier Chinabalire

01/31/2018, 10:37 AM

no it will keep looping all the values

edwardwongtl

01/31/2018, 10:39 AM

If you don't want to call that

fun

for every

User

in the list, then use

filter

to get rid of the unwanted

User

first, then

map

each

User

to the result of that

fun

Kevin Janvier Chinabalire

01/31/2018, 10:56 AM

i will just pass my

fun

inside a

for

cz filtering is not helping

Am i doing it right like this

var getuser:List<User> = arralist.filter { user -> User ==User() }

            println("FILTER 909 $getuser")
            getuser.map { dataModel ->
                log("DADADADADDAAD $dataModel")
            }

edwardwongtl

01/31/2018, 11:00 AM

fun action(user: User): T = ...
val arraylist: ArrayList<User>
arraylist.filter { user -> user == ... }.map { action(it) }

action()

does not return a value, replace the

.map

with

.forEach

Kevin Janvier Chinabalire

01/31/2018, 11:05 AM

when filtering can i replace all the model ? like

arraylist.filter { user -> user == User() }.map

edwardwongtl

01/31/2018, 11:06 AM

Oh then you should do

.map { User() }

Kevin Janvier Chinabalire

01/31/2018, 11:09 AM

``` arraylist.filter { user -> user == User()}.map {User() println("DDDD ----------- $it") }``that line ain't executed

edwardwongtl

01/31/2018, 11:10 AM

Cause nothing matches

user == User()

filter

is not meant for manipulating data

Kevin Janvier Chinabalire

01/31/2018, 11:15 AM

how tp get something which matches ?

edwardwongtl

01/31/2018, 11:19 AM

Don't understand what you want to ask

To clarify the problem, you have a

ArrayList<User>

, and you want to pass some of them into a function

fun action(user: User): Result

, and gather all the results. Am I getting it wrong, or you want to actually manipulate the

ArrayList<User>

Kevin Janvier Chinabalire

01/31/2018, 12:04 PM

u are getting it right

it like that .. from my

ArrayList<User>

i want to access the model by looping

edwardwongtl

01/31/2018, 12:13 PM

Then its simple as just

users.filter { boolean condition }.map { user -> getResult(user) }

This will gives you back

List<Result>

which you can then operate on

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