There seem to be many coroutines-based successors to RxBinding -- any suggestions which to choose (or not to choose)?

Stupid question, if you use typealias, do you have one for mutable type and one for the non-mutable counterpart like:

typealias Parameter = Map<WebKey, ByteArray>
typealias MutableParameter = MutableMap<WebKey, ByteArray>

or do you just define the mutable typealias and convert the type to its counterpart at the right time?

Is there any way to save layout snapshot now? New layout inspector barely works, lags and resets view. Or do you use some third party layout analysers?

Hi, I'm trying to integrate "video-call" functionality, reading a lot about WebRTC, but can't find any samples that use foreground service to save my life, everything I found is implemented in an Activity. Signal app uses foreground service, but damn it is so complex, can't get my head around it. Does anybody have any pointers, sample projects?

I’ve uninstalled and reinstalled Android Studio but I’m still seeing some weirdness. Basically, whenever I try and create a new resource file AS freezes up and dramatically slows down. I can’t exit out (except by forcing AS to quit) and clicking on any buttons is unresponsive. Any tips around this?

Hello, I have a Multiplatform with Compose project which was working fine. Then I upgraded to AS canary canary 3, AGP alpha 3 and Gradle 6.8-rc-1 and started having this issue during Android build

Could not determine the dependencies of task ‘clientandroid:compileDebugJavaWithJavac’.

> Could not resolve all dependencies for configuration ‘clientandroid:debugRuntimeClasspath’.

> A problem occurred configuring project ‘moviesremote:tmdb’.

> org.gradle.api.internal.initialization.DefaultClassLoaderScope@4ba09663 must be locked before it can be used to compute a classpath!

Meanwhile I moved to canary 4, AGP 4, Gradle 6.8 stable but still there. Any ideas?

In there koline library that sopport xmpp

@Adam Powell @romainguy why didn’t the Android UI team make View Binding to be as simple as kotlin synthetics where one can just access the view in code by just specifying the view ID alone instead of writing this boilerplate required in View Binding.

private var _binding: ResultProfileBinding? = null
// This property is only valid between onCreateView and
// onDestroyView.
private val binding get() = _binding!!

override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    _binding = ResultProfileBinding.inflate(inflater, container, false)
    val view = binding.root
    return view
}

override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
}

I'm experimenting with the Navigation Component and I'm trying to figure out what's the proper/intended api usage. Imagine I'm building a Slack clone with the following nav graph:

WorkspacesListFragment                     WorkspaceFragment                    ThreadFragment
            R.id.workspacesListFr                      R.id.workspaceFr                     R.id.threadFr
            +--------------------+                    +-----------------+                 +----------------+
            |                    |                    |                 |                 |                |
            |  List:             |  arg: workspaceId  |  List:          |  arg: threadId  |                |
            |  * kotlinlang      +-------------------->  * androidx     +----------------->                |
 start dest |  * workflow-kotlin |                    |  * compose      |                 |                |
+----------->  * etc...          |                    |  * etc...       |                 |                |
            |                    |                    |                 |                 |                |
            |                    |                    |                 |                 |                |
            |                    |                    |                 |                 |                |
            +------+-------------+                    +-----------------+                 +----------------+
                   |
                   |
                   |
                   |
                   |          CreateWorkspaceFragment
                   |
                   |        +--------------------------+
                   |        |                          |
                   |        | besides a new workspace, |
                   |        | optionally could create  |
                   +--------> a new thread as well     |
                            |                          |
                            |   has workspaceId        |
                            |   has threadId?          |
                            |                          |
                            |                          |
                            |                          |
                            +--------------------------+

When a new workspace is created I'd like to navigate to it when the operation is successful. I've come up with 2 ideas: Option 1: use the navigation controller available inside CreateWorkspaceFragment and navigate directly from there:

CreateWorkspaceFragment {
    ...
    fun onComplete(workspaceId: String, threadId: String?) {
        val navController = findNavController()
        // 1. Go back to WorkspacesListFragment
        // fragment will trigger an async api call to fetch and then display the list
        navController.popBackStack()

        // 2. Go to WorkspaceFragment
        // fragment will trigger an async api call to fetch and then display the workspace
        navController.navigate(
            WorkspacesListFragmentDirections.actionToWorkspace(workspaceId)
        )

        // 3. Go to ThreadFragment if user created a thread
        // fragment will trigger an async api call to fetch and then display the thread
        if (threadId.isNullOrEmpty().not()){
            navController.navigate(
                WorkspaceFragmentDirections.actionToThread(threadId!!)
            )
        }
    }
}

Option 2: • return workspaceId & threadId as a result to the previous

WorkspacesListFragment

Destination (either FragmentResult API or navController.previousBackStackEntry?.savedStateHandle ) • from

WorkspacesListFragment

I can navigate to

WorkspaceFragment

and pass along workspaceId & threadId • inside

WorkspaceFragment.onCreate

I can check the args and if there's a threadId I'll trigger navigation from there to

ThreadFragment

(but I'll have to

WorkspaceFragment.arguments = null

, otherwise when coming back it'll navigate to

ThreadFragment

again, indefinitely) Essentially, Option 1 come down to handling my navigation logic in-place and Option 2 would spread it across each destination. FragmentNavigator does Fragment transactions asynchronously, Option 1 acts like navigation is a synchronous operation and it doesn't seem right to me... but Option 2 is a lot more code, so... Suggestions? (anyone from the androidx.navigation team around here?)

Hello devs, Is it possible to create custom Room database return types like rxjava3's flowables/observable/single, suspend and flowables, paging's data source etc.. I want room to return a type of my sealed class, just like you can do with retrofit's custom call adapters?

I tried to download a file with ktor-client and it failed, please help me https://paste.ubuntu.com/p/s9d68DBKgY/

Hi maybe a stupid question but I never thought about that before. When I define a

mutableListOf<String>

and pass this to a consuming function, should I convert this list explicitly to

List<String>

with

toList()

to have this list immutable or is it enough to define the parameter as

List<String>

like:

fun consumingList(list: List<String>)

But then I'm asking if it's really an immutable list... I could still cast it to a mutable List again, not?

Hi everyone, I’m currently stumbling across an issue handling decrypting AES encrypted strings from iOS. Currently the flow would be something like: 1. User on iOS App encrypts data with Common Crypto framework and saves it to back end 2. Android app pulls that encrypted data from endpoint and decrypts it I ensured that on Android side we’re using the same padding and transformations as iOS. I’m currently able to decrypt half of the string but losing data in the first half. I was wondering if it was because of the encrypted string wrapping/newlining and tried a few methods of handling it but to no avail. Can anybody help point me in the right direction?

I tried use ktor-client to do a put request, upload some files into web, but that give me a redirect unhandle exception, please help, https://paste.ubuntu.com/p/5mFhHRCZHp/

Hi, I was wondering about Unique Identifier Best Practices. I've seen implmentations where,

Settings.Secure.getString(context.contentResolver, Settings.Secure.ANDROID_ID)

is used as a "Unique Identifier" but this prompts a warning in Lint saying, that it is

not recommend

. With the message:

Using these device identifiers is not recommended other than for high value fraud prevention and advanced telephony Using these device identifiers is not recommended other than for high value fraud prevention and advanced telephony use-cases. For advertising use-cases, use AdvertisingIdClient$Info#getId and for analytics, use InstanceId#getId

I'm not quite sure if my use-case falls under the use of this value. I also wonder why this isn't mention in Best practices for unique identifiers. And so by reading the Documentation, I found out about DRM API and was wondering if this is a better alternative to the one above. I'd really appreciate any feedback. Please share your thoughts. Thank you very much.

I've a question regarding paging3: Looking at the official example, we're returning new flow of

PagingData

everytime we search with new query. Although it's true that every flow is going to be different, don't you think that we could have used `SharedFlow`s here somehow?

Hi, is there a way to decode a inputstream of a jpeg file into a bitmap?

Hi everyone 👋, I want tutorial for Ktor with Android Kotlin

Hey guys! I have just started learning kotlin. Been using Flutter for an year but wanted to learn native as well. I was trying room library. Its recommended in docs to use singleton pattern with the database. So I thought that an object would be go to choice, however, I see everyone is using abstract class. Any reasons why?

Hello, I am encountering a strange issue but after seeing it reproducible in Chrome with it's own FileProvider and with WhatsApp's MediaProvider I think is caused by something in Android's

Intent.createChooser()

Basically using

ACTION_SEND

and

EXTRA_STREAM

with

FLAG_GRANT_READ_URI_PERMISSION

means a

java.lang.SecurityException: Permission Denial .. requires the provider be exported, or grantUriPermission()

error being logged although the expected flow works without issue. Because this is happening with AAA apps also I would think this is a deeper issue in Android that doesn't yet have a solution or even a workaround but I'm curious if anybody would know more about this.

Setting a key/value on a

SavedStateHandle

within a (Fragment's) ViewModel's

onCleared()

does not appear to take effect (i.e. survive activity death). Setting it prior to

onCleared()

e.g. in

init {}

does successfully persist. Is that expected? I don't see that behavior documented anywhere, other than that onCleared comes after onDestroy.

Should we make Jetpsck

DataStore

classes Singleton or not? I was trying to achieve a behavior where if you change IP address from settings fragment, all the subsequent network calls should be made with updated IP. I tried to use preferences Flow variables to update repository variable but this isn't working

Not related to kotlin, but to android app signing in CI tools and automating release pipeline to upload builds on firebase app distribution: https://premsuman.medium.com/android-debug-signed-release-builds-with-github-actions-4f3d08f8a6f5

What is the recommended way to setup multiple click listeners for buttons within a single RecyclerView row?

hello everyone I'm starting to use Apollo (instead of Retrofit )to make requests from graphql Api, I'm new to this style so i have some questions if someone experienced this before i already made the first call, and i realised that the data model generated at compile time and its not open to modify or extend it, how i can modify it, for example i need to make data model for Room database and that model is the same model of the model i will get from the api so what i have to do in this situation ? any help please

Does the new TimePicker from the AndroidX Material Design Components support input validation?

Hi All, Is it possible to open an Activity when user get notification ( I mean without click of pending Intent) ? Requirement is to show activity something like call when user intimated by push notification.

I’m currently struggling with local notifications. Enqeueing works with errors, but when I check the WorkManager queue via

adb

there are to less jobs enqueued:

Hello there, Can someone plz recommend me an Image Processing Library for Android? Some samples implementing it will also be helpful.

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