Need help in converting this into a coroutine 🙂

nextButton.setOnLongClickListener {
            val handler = Handler(Looper.myLooper()!!)
            val runnable: Runnable = object : Runnable {
                override fun run() {
                    handler.removeCallbacks(this)
                    if (nextButton.isPressed) {
                        println("Do Something!")
                        handler.postDelayed(this, 500)
                    }
                }
            }
            handler.postDelayed(runnable, 0)
            true

}

hey, i have written a little android example app (my first one ever 😄) with jetpack-compose. since i need to use a blocking client to fetch my data to fulfill my use-case i am wondering how to do that. what i tried is to just call my client in a suspend function / coroutine and make the data available to my composables via a viewModel like this:

class StargazerViewModel : ViewModel() {

    private var _users: MutableLiveData<List<User>> = MutableLiveData(emptyList())
    val users: LiveData<List<User>> = _users

    fun updateUsers() {
        viewModelScope.launch {
            _users.postValue(fetch())
            // _users.postValue(dummyData) // when using valid dummy data here the app works as aspected
        }
    }
}

private suspend fun fetch(): List<User> =
    skrape(HttpFetcher) {
        request {
            url = "<https://github.com/skrapeit/skrape.it/stargazers>"
        }
...

full code here: https://github.com/skrapeit/skrape.it/blob/android-example/examples/android/app/src/main/java/it/skrape/skrapeitexample/MainActivity.kt whenever i call the fetch method i get a

android.os.NetworkOnMainThreadException

which i assume is because my client call is blocking and thereby break the coroutine (maybe?) what can i do to run the blocking client in a background thread to avoid the NetworkOnMainThreadException in a jetpack-compose project?

✅ [RESOLVED] Thread: AS can't compile with

dagger.hilt.android.plugin

plugin 🧵

Can somebody help, need help in gesture part of jetpack compose https://stackoverflow.com/questions/67752131/long-press-gesture-in-jetpack-compose

How to change the field name of

Pair

? The code like this :

val distributorNotes = ArrayList<PairDistributorNotes<String, String>>()

distributorNotes.add(PairDistributorNotes("350631771", "test"))

data class PairDistributorNotes<out x, out y>(val distributor_id: x, val note: y) {
    override fun toString(): String = "($distributor_id, $note)"
}

and i create

asReverse(

) with

distinctBy

val dataJson = Gson().toJson(distributorNotes.asReversed().distinctBy { it.distributor_id })

Output from dataJson :

[{"a":"350631771","b":"test"}]

Can field a and b change to distributor_id and note ? Expected :

[{"distributor_id":"350631771","note":"test"}]

UPDATE Based on Christian Grach answer, because Proguard is enabled, Gson require annotations to preserve the field name.. We need to add

@field:SerializedName()

on

data class

data class PairDistributorNotes<out A, out B>(
      @field:SerializedName("distributor_id")
      val distributor_id: A,

      @field:SerializedName("note")
      val note: B
) {
      override fun toString(): String = "($distributor_id, $note)"
}

is there any better way to write this code? code in thread

does anyone have experience with kmm here?

Hi guys i use single activity want to ask how to pass data from parent fragment to child fragment, the child fragment attached to parent fragment by tab layout got any reference without creating interface

I have some problem to bind a viewmodel with the ui logic to a <include> layout i have some <inlude in my layout and i want to pass my viewmodel to all inlude layout? what is the prefered solution? 🤔

Hello, does anyone have this issue with AS Artic Fox on a MacPro using a mac pro with M1 chip?

Hi guys, do U know how I can install 1 app from another app, just like Facebook do with messenger?? https://stackoverflow.com/questions/63812164/how-does-the-facebook-android-app-install-facebook-messenger

Hello guys need help to how to hide my appbar and bottom nav view when i'm scrolling, the appbar and toolbar is in the fragment and the bottom nav view is in activity and I'm using navigation component so how can i achieve that

I have seen people initialize variables in lifecycle classes by doing this

class MainActivity : ComponentActivity() {
    
    val foo by lazy { Foo() }
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        foo // initialize
    }
}

I see the following benefits • the "initialization" of the value is visually closer to where it is defined •

foo

is a

val

Are there any disadvantages doing this? What do you guys prefer?

Hello everyone, I have been into kotlin for few months, one issue I started facing in the early days of my learning. I will be very much thankful for any response regarding the same. I have a JSON list, in which I need to filter the data based on some filters. I was using predicate for filtering, but as per my need I need to filter the nested list, and if here I use predicates I am left with 3 test predicates that's

Any, None, and All

but as I want only matched data and which I am not getting using any of these predicates. As Any returns true if at least there is one match element, and All returns true if there are all matched elements but how can I get only the matched elements from the nested list irrespective of any non-matched element. I can use the traditional approach of looping through the list, but I wanted to know whether it is possible using a predicate. Here's the sample JSON I am trying to get the center whose session elements contains

min_age_limit is > 18

and

available_dose_1 > 0

.

{
"centers": [
	{
		....
		"sessions": [
			{
				"session_id":"adad",
				...
				"min_age_limit":45,
				"available_capacity_dose1": 5,
				"available_capacity_dose2": 5
				...
			},
			{
				"session_id":"adad1",
				...
				"min_age_limit":18,
				"available_capacity_dose1": 0,
				"available_capacity_dose2": 5
				...
			},
			{
				"session_id":"adad2",
				...
				"min_age_limit":18,
				"available_capacity_dose1": 5,
				"available_capacity_dose2": 0
				...
			}
		]
	}
	....
	]
}

Introducing HiltBinder: An annotation processing library that automatically generates Dagger Hilt's @Binds methods. Just annotate your class with the @BindType annotation:

interface ImageLoader

@BindType
class GlideImageLoader @Inject constructor(): ImageLoader

and HiltBinder will generate the following:

@Module
@InstallIn(SingletonComponent.class)
public interface HiltBinder_SingletonComponentModule {
  @Binds
  ImageLoader bind_GlideImageLoader(GlideImageLoader binding);
}

HiltBinder supports lots of features: • Specifying a particular type to bind to. • Installing bindings in both Dagger Hilt's predefined and custom components. • Contributing bindings into a set and map collections (Dagger multibindings). • Associating bindings with Dagger qualifiers. • KSP support. For more info, take a look at the GitHub repository that contains extensive documentation for the API as well as sample application to showcase the library in action.

Hello, i need some help with child fragments. I’ve a bottom sheet whose content is taken care by a child fragment. Can i pass this child fragment as an param in parent bottom sheet’s constructor given i create a FragmentFactory that takes this child fragment as an argument. This approach is also limiting because i cannot pass runtime arguments to the factory, and it gets plugged in the fragmentManager once. Would be REALLY HELPFUL if there are good sample on how to deal with child fragments, esp. when system kills the process.

paging library: how does the library figures out if it needs to reload data on configuration change? it always shows old data for a split second, then immediately scrolls to top and does refresh+append. I’m not sure what can cause this, samples do not have this behavior - load method is not even called I can’t even debug it, debugger points me to .class files, breakpoints in kotlin equivalents don’t hit

Hi people, Does kotlin support exhaustive when without assigning a variable or without libraries?

Hi friends, Encountered a weird issue when using ViewBinding with Fragments. fragment_one_layout

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <include
        android:id="@+id/name"
        layout="@layout/form_element_layout" />

    <include
        android:id="@+id/unit"
        layout="@layout/form_element_layout" />
    <include
        android:id="@+id/quantity"
        layout="@layout/form_element_layout" />
</LinearLayout>

form_element_layout

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/title"
        style="@style/TextViewRegularHeading"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/title"
        android:textSize="@dimen/title_text_size" />

    <EditText
        android:id="@+id/input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/edit_text_forms_bg"
        android:hint="@string/form_hint"
        android:inputType="text" />
</LinearLayout>

After entering values in

name.input

,

unit.input

and

quantity.input

fields, I've navigated to fragment_two. When returning from the fragment_two to fragment_one, the values in every field changed to the value of the

quantity.input

Eg : name is John, unit is Kg and quantity is 80. After navigating to fragment_two and returned, the name, unit and quantity values are changed to 80, Any help?

This message was deleted.

Hey, I have a JSON response and i need to filter that data in a list. In every JSONObject there are 3 categories in which only one category holds data.

data class CategoryResponse(
        val item: List<CategoryItem>
)

data class CategoryItem(
        val id: Int,
        val Category1: List<ItemOptions>? = null,
        val Category2: List<ItemOptions>? = null,
        val Category3: List<ItemOptions>? = null
)

data class ItemOptions(
        val name: String? = null,
        val url: String? = null
)

I have an enum class, which has 4 enum types

enum class CategoryType(val name :String){
  ALL("ALL"),
  Category1("Category1"),
  Category2("Category2"),
  Category3("Category3");
}

There is a category named ALL, so i need the list of all the data but I don't want any null values, and still want the data that other categories hold. Example - the list consist of 5 elements  Desired output: ALL : list-> [id : 1 , category1 : ”..”] , [id : 2 ,category2 : “..”] , [id : 3 ,category2 : ”..”] , [id : 4 ,category1 : “..”] , [id : 5 ,category3: “.."]    CATEGORY2: list -> [id : 2 , category2 : “..”] , [id : 3 , category2 : “..”] (this list may or may not consist of more than 5 elements) is there any way that this list won’t occupy a lot of memory, or duplicate the objects and could be more efficient.?

Hi guys, I have two suspend methods that I launch concurrently inside a ViewModel:

init {
    viewModelScope.launch {
        launch { loadTotalCirculation() }
        launch { loadMarketPrice() }
    }
}

private suspend fun loadTotalCirculation() {
    val totalCirculation = bitcoinChartsRepository.getTotalCirculation(5, TimeUnit.HOURS)
    _viewState.value = _viewState.value.copy(totalCirculation = chartViewEntityMapper(totalCirculation))
}

private suspend fun loadMarketPrice() {
    val marketPrice = bitcoinChartsRepository.getMarketPrice(27, TimeUnit.DAYS)
    _viewState.value = _viewState.value.copy(marketPrice = chartViewEntityMapper(marketPrice))
}

However, I would like to prevent the concurrent execution of the

_viewState.value = _viewState.value.copy...

parts in both my methods. What's the best way to achieve this ? These two requests update parts of a stateflow that's collected inside a Fragment. However, often they run concurrently emitting the wrong states. Is there a way to better architect this solution ?

How do I start multiple apps in one android project? I also want to share code between the apps. Any tutorial or official documentation which may help me with this. Thanks.

What is the proper Kotlin Flow alternative to SingleLiveEvent?

This message was deleted.

This message was deleted.

I am using Dropbox Store4 (which is something like a NetworkBoundResource). I am experiencing an issue where my Fetcher is never called because my reader returns a non-null empty list (Store sees this as valid data). How can I adjust my Room DAO to return null if there are no results (so I can successfully trigger Fetch to actually load new data?). See thread for screenshots

Hi all 👋! Does Kotlin 1.5.10 on Android 23 depend on Java 8 APIs at a lower level? I am stitching together an experimental Android/100% Kotlin project playground with the Android/Kotlin and JetPack stack without the technical legacy and I have stumbled upon this question. Is it mandatory to include Java 8 desugaring in a pure Kotlin Android project targeting minSdkLevel 23? The full Java 8 support was only added in Android 24, but I don’t plan to use the “new” Java 8 APIs. Thanks!

Hi Everyone, guide me, I want to add chat head feature in my app using kotlin lang. Give your suggestion or any documentation about it.

Do you often use something like following to execute your code concurrently instead of synchronously? I see a lot of tasks during clean up don't need to happen synchronously.

viewModelScope.launch {
    launch { task1 }
    launch { task2 }
}