Is there any major advantage of using kotlin gradle build script over groovy?

How can print directly to added printers, without preview screen by System

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Hiii.... what is the easiest method in kotlin to round a float value upto 2 decimals and for all locales (whether it uses decimal point or decimal comma) currently i am using this method but it throws NumberFormatException for locales that use decimal comma.

fun Float.round(decimals: Int = 2): Float = "%.${decimals}f".format(this).toFloat()

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I want to make a QR Generator & Scanner app. Any resources suggestions ? #education

Hi, I have a doubt about Kotlin lazy property delegation For example, this property delegate with lazy:

val x: String by lazy{...}

When I decompile the Kotlin code into Java code, I see that the getX() method is not ultimately called this method

public inline operator fun <T> Lazy<T>.getValue(thisRef: Any?, property: KProperty<*>): T = value

It is the getter method of value, which is

getValue()

instead of

getValue(thisRef: Any?, property: KProperty<*>)

So, I don’t understand how the method

getValue(thisRef: Any?, property: KProperty<*>)

is called during the execution of lazy

How do you achieve nested ordering? i.e When you have a data class eg.

Chat

which holds another class with a list of

Message

can you order a list of chats with a variable in message like

createdAt

Hi, I have a function that does a lengthy operation, but I want it to return only after this operation is completed. Also I would like the caller of the function to call it inside a coroutine because it could block them. I did something like:

suspend fun foo(){
        runBlocking(<http://Dispatchers.IO|Dispatchers.IO>) {
            // do some operation and return only after it's completed
        }
    }

How ever adding the suspend modifier gave me the following warning (posted in reply).

anyone know why android lint is not failing with this setup 🤔

lintOptions {
        checkReleaseBuilds false
        warningsAsErrors true
        abortOnError true
        lintConfig file('lint.xml')
        baseline(file("lint-baseline.xml"))
    }

I added a new lint violation which is a warning, but should be treated as an error and abort.. yet the build succeeds every time

I have a

List<Map<String, String>>.

I would like to add a pair to a specific map in the list which I determine with

myList.find { it["myKey"] == "keyValue" }

What is the best approach to achieve this. The first option that comes in mind is to remove the map and add the map with the new pair. Any better ideas?

Is it ok to use broadcast receiver just to refresh content of other activity? I have got a project where I found this. Check Thread.

Hello everyone, I’m new to the channel and android/kotlin can I get some help on what is a model, view, and viewModel like I’m 5 year-old?

Hello, I have a recyclerview inside scrollview. Each item has a horizontal recycler also. My main issue is when I want scroll up/down and my finger is on horizontal recyclerview (item) it doesn't scroll up/down. I can't remove the nestedScroll from horizontal recview because I need it. Any ideas?

I am working on a library that is being consumed by Android clients. We would like to try some of the new functionality by setting languageVersion to 1.6. Does this require our clients to also use that languageVersion or would be generated jar/aar be compatible regardless. The usage of 1.6 language features would only be internal/private

Hi, anyone know how to get this design ..... Thanks

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Hi folks, I want to extract from an url the substring before

v[0..9]

e.g:

<https://baseurl.test/v1/example/{id}>

the result should be only

<https://baseurl.test/>

Where the version number can be 1,2....9 Is there a way to do this?

When collecting a Kotlin flow inside an Activity or Fragement:

override fun onCreate(…) {
 …
 scope.launch /* on Dispatchers.Main */ {
   viewModel.flow.collect { it ->
      uiElement.text = it
   }
 }
}

Is is better to do

launch(Dispatchers.Default)

and then wrap the UI operation in

withContext(Dispatchers.Main)

, or is there no practical difference since the collect is suspending and not blocking? If I would do more operations except setting the UI element, I would always do the approach with launch on Dispatchers.Default + withContext(Main), but here I really only update the UI on collect

does KMM support PagingDataAdapter for ListAdapter in android ? I

[SOLVED] I have a string, something like "Test;Test1;;;;;". Applying

myString
    .map { it.split(";") }

gives me a

List<List<String>>

where the last items are empty strings because

split

interperets ";" as empty string ->

""

. I would like to have

null

instead of

""

. How can I achieve this? Output should be

List<List<String?>>

Woww.... I'm really impressed by Jetpack Compose. Just checkout this UI 👇👇 In traditional XML it would have taken a whole RecyclerView, ViewHolder, DataBinding maybe, a bunch of Gradle dependencies and whatnot 🥵🥵... But in Compose it's just 20 lines of Kotlin code 🤯🤯🤯

Hello,  I get this error  'Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference'. How can I fix this issue?

override fun onBindViewHolder(holder: DataViewHolder, position: Int) {
    holder.bind(users[position])

    holder.itemView.textViewUserName.setOnClickListener(View.OnClickListener {

        Toast.makeText(it.context, "Pos:$position", Toast.LENGTH_LONG).show()
        MyCustomDialog().show((it.context as MainActivity).supportFragmentManager, "MyCustomFragment")
       it.tv_name.text = users[position].name    //Error
    
    })
}

HI team i am using Interface for call back, is there any alternative of interface which i can use in kotlin, as i don't have a lifecyclerowner so i can't use LiveData and coroutines

Hello, how can I convert from geohash (example: dj0rtcbpn) to latitude and longitude using Kotlin? What is the best library? Thanks in advance.

What is the best way to get a screens dp pixel height programmatically? I tried using

context.display?.getRealMetrics(displayMetrics)

but that seems to return a much larger value than I'm looking for. I know for Pixel 2 the height is ~730, but I get 1920 when using

displayMetrics.heightPixels

. In other words, I'd like to see programmatically which devices will use

values

and which will use

values-h700dp

#android Hey guys, there is a rest Api configuration need to be fetched every few days for getting things like last updated base image's url and etc. I was wondering what is the best way for doing that. I really appreciate it if anyone give me the best way for doing that

Whats the fastest/most efficient way to make a deep copy of an object with lists of other objects?

Hello i want to implement search on nested list in my android project by kotlin... i have written this code

listItems.forEach { widgetData->
    if(widgetData.title.contains(keyword, true)){
        searchedList.add(widgetData)
    }else{
        val filteredWidgets = item.widgets.filter { widget ->
            widget.title.contains(keyword, true)
        }
        if (filteredWidgets.isNotEmpty()) {
            val newItem = WidgetData(
                id = widgetData.id,
                title = widgetData.title,
                isFree = widgetData.isFree,
                theme = widgetData.theme,
                thumbnail = widgetData.thumbnail,
                widgets = filteredWidgets
            )
            searchedList.add(newItem)
        }
    }
}

here is my data classes

data class WidgetData(
    val id: Int,
    val isFree: Boolean,
    val theme: Any,
    val thumbnail: String,
    val title: String,
    var widgets: List<Widget>
)
data class Widget(
    val image: String,
    val title: String,
    val type: String
)

i am sure there will be a better option in kotlin to write this, i am searching for that..