Is anyone here using SQLDelight w/ a version of sqlite that supports FTS5?

Hello! I have a problem with Paging v3 library on Android, here's what happens: When the app is opened, the list is shown correctly and everything is great, but if I call

invalidate()

method of PagingSource, then it starts spamming

load

method of PagingSource (and doesn't even wait until the job is finished, cancels it and starts anew). This is the stacktrace:

2021-07-14 02:23:46.189 15215-15254/com.xlebnick.kitties.debug D/OkHttp: --> GET <https://myapi.com/v1/images/search?page=0&limit=24&order=ASC>
2021-07-14 02:23:46.189 15215-15254/com.xlebnick.kitties.debug D/OkHttp: x-api-key: 9b7e282d-2a67-4c7b-a9fd-3f3e4056e949
2021-07-14 02:23:46.189 15215-15254/com.xlebnick.kitties.debug D/OkHttp: --> END GET
2021-07-14 02:23:46.189 15215-15254/com.xlebnick.kitties.debug D/OkHttp: <-- HTTP FAILED: java.io.IOException: Canceled
2021-07-14 02:23:46.189 15215-15215/com.xlebnick.kitties.debug W/System.err: kotlinx.coroutines.JobCancellationException: StandaloneCoroutine was cancelled; job=StandaloneCoroutine{Cancelling}@6c3004

And this is my implementation:

class KittiesPagingSource(
    private val repository: Repository,
    var breedFilter: Breed? = null,
    var likedKitties: List<Like> = listOf()
) : PagingSource<Int, Kitty>() {


    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Kitty> {
        return try {
            // Start refresh at page 1 if undefined.
            val nextPage = params.key ?: 1

            val filters = if (breedFilter != null) listOf(breedFilter!!) else null
            var kitties: List<KittyRemoteModel> = listOf()
            try {
                kitties = repository.fetchKitties(nextPage, KITTIES_PAGE_SIZE, filters)
            } catch (e: Throwable) {
                e.printStackTrace()
            }

            val newKitties = kitties.map { kitty ->
                kitty.asKitty(likedKitties.any { it.imageId == kitty.id })
            }

            LoadResult.Page(
                data = newKitties,
                prevKey = if (nextPage == 1) null else nextPage - 1,
                nextKey = if (newKitties.isEmpty()) null else nextPage + 1
            )
        } catch (e: Exception) {
            LoadResult.Error(e)
        }
    }

    override fun getRefreshKey(state: PagingState<Int, Kitty>): Int? {
        return state.anchorPosition?.let {
            if (it < state.config.initialLoadSize) {
                // if anchor position is less than initial loading count then download from the beginning
                0
            } else {
                // otherwise load a page around anchorPosition using initialLoadSize
                (it - state.config.initialLoadSize / 2).coerceAtLeast(0)
            }
        }
    }
}

private val kittiesPagingFactory = InvalidatingPagingSourceFactory {
        KittiesPagingSource(repository, breedFilter, likedKitties.value ?: listOf())
    }
    private val kittiesPager =
        Pager(PagingConfig(pageSize = 6), pagingSourceFactory = kittiesPagingFactory)
    val kitties: Flow<PagingData<Kitty>> = kittiesPager
        .flow
        .cachedIn(viewModelScope)

What am I doing wrong?

Guys gonna switch my full java project into kotlin, wish me good luck!

Hello guys!! I am new to android development and recently I have installed the android studio. But there is a error popping up again and again code navigator plugin is incompatible. I have tried to downloaded and installed it manually but still it is not working. Can someone please help?

Hello, I want get the objects from users array from API using Moshi , but I get non understandable error  'Inferred type is UserResponse but User was expected' in  setupObserver(). What mistake did I make? Thanks in advance.

{
  "users": [
    {
      "id": "1",
      "name": "Bill Roy",
    },
     {
      "id": "2",
      "name": "Ben Bush",
    },
    {
      "id": "3",
      "name": "Dan Fox",
    },
  ]
}

User.kt

data class User(
    @Json(name = "id")
    val id: Int = 0,
    @Json(name = "name")
    val name: String = ""
)
data class UserResponse(
    @Json(name = "users")
    val userList: List<User>
)

MainViewModel.kt

class MainViewModel(
    private val mainRepository: MainRepository,
    private val networkHelper: NetworkHelper
) : ViewModel() {

    private val _users = MutableLiveData<Resource<UserResponse>>()
    val users: LiveData<Resource<UserResponse>>
        get() = _users

    init {
        fetchUsers()
    }

    private fun fetchUsers() {
        viewModelScope.launch {
            _users.postValue(Resource.loading(null))
            if (networkHelper.isNetworkConnected()) {
                mainRepository.getUsers().let {
                    if (it.isSuccessful) {
                        _users.postValue(Resource.success(it.body()))

                    } else _users.postValue(Resource.error(it.errorBody().toString(), null))
                }
            } else _users.postValue(Resource.error("No internet connection", null))
        }
    }
}

 MainAdapter.kt

class MainAdapter(
    private val users: ArrayList<User>
) : RecyclerView.Adapter<MainAdapter.DataViewHolder>() {

    class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        fun bind(user: User) {
            itemView.textViewUserName.text = user.name
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
        DataViewHolder(
            LayoutInflater.from(parent.context).inflate(
                R.layout.item_layout, parent,
                false
            )
        )

    override fun getItemCount(): Int = users.size

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

    fun addData(list: User) {
        users.addAll(listOf(list))
    }
}

MainActivity.kt

private fun setupObserver() {
    mainViewModel.users.observe(this, Observer {
        when (it.status) {
            Status.SUCCESS -> {
                progressBar.visibility = View.GONE
                it.data?.let { users -> renderList(users) }          
                recyclerView.visibility = View.VISIBLE
            }........
}

 private fun renderList(users: User) {
        adapter.addData(users)                             
        adapter.notifyDataSetChanged()
    }

Compose question but android ish specific so I'm going to ask here first. I have an app with all fragments. I currently check in every fragment if my user is logged out. I follow Ian Lakes video on navigation and everything works really well. I'm moving fully to compose now, no fragments and so now I'm curious how I would do the same check. Overall just curious if someone has docs on how to tackle this use case in pure compose. Basically is there something like this 4:48 but for compose?

Hi there. I have a question about the 1.5.0 release. There's a part of my Kotlin Android app that works fine with 1.4.32 but doesn't work with 1.5.0, 1.5.10, or 1.5.20. It's when a WebView is destroyed. I first remove it from the parent container in the UI and then call destroy on the object itself. In the old version of Kotlin, it works well, but in the newer versions, the variable gets set to

null

after the WebView is detached from the parent container. Destroying it later on results in a

NPE

. Posted about it here. Have really no idea what it could be after perusing the release notes. Would appreciate any help

Has anyone encountered kotlin synthetic doesn't generate _findCachedViewById function after update to version 1.5.x? I have submitted a bug here: https://youtrack.jetbrains.com/issue/KT-47733

Hi Everyone, Have a doubt, but it is not related to kotlin, but generally any android app I was reading some codes from github, and I found that each use case is written in a different class/File, I dont understand Why people are doing that, since i can write those as functions inside my repository class. Is that a good aproach to abstracting out the use cases seperately??

Hello, I am having an issue with my application. Its a video call app using peerJs and the webview layout. The app installs but does not start immediately as the normal way. And when I click on the icon, it says app not found. What could be wrong. Here is my manifest file: Any assistance is much appreciated, thank you.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="<http://schemas.android.com/apk/res/android>"
    xmlns:tools="<http://schemas.android.com/tools>"
    package="com.devhub.meet">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:usesCleartextTraffic="true"
        android:theme="@style/Theme.Meet">
        <activity
            android:name=".CallActivity"
            android:exported="false" />
        <activity android:name=".MainActivity"
            android:exported="false">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Hi All! Is there any third party library that I can use for SVG support, Zoom, touch events and has pins support as well? Basically, we are trying to add floor plans in SVG format on the screen and then user can add/change/save pin for any location on the floors.

I am trying to read image from asset folder. Android studio gives me a warning saying: "Warning:() Inappropriate blocking method call" even though I call

open

from IO Dispatcher. My code:

withContext(<http://Dispatchers.IO|Dispatchers.IO>) {
    context.assets.open(FILE_NAME).run {
        this.readBytes().also { file = it }
        this.close()
    }
}

Any ideas, folks?

I know there are a lot of 3rd party libraries on android-arsenal.com for tooltips, but if i wanted to create my own custom View, how should I go about this? I want to avoid having to draw to the Canvas to create the tooltip. At the moment I have the content in one view and the arrow in another view. I want to position the arrow either on top or on bottom of the content, and i want to position it a percentage distance from the left or right. I was thinking of using ConstraintLayouts and horizontal biases. Am i on the right track?

Hello everybody, What is the reason of this error?  And how can I fix it?   " FATAL EXCEPTION: OkHttp Dispatcher     Process: net.simplifiedcoding, PID: 13491     kotlin.UninitializedPropertyAccessException: lateinit property binding has not been initialized" in Fragment

fun reqBody(): RequestBody {
    val clientIdentifier = binding.edittxtClientIdentifier.text.toString().trim()
    val device = binding.edittxtDeviceType.text.toString().trim()

    val lang = binding.edittxtLang.text.toString().trim()
    val partn = binding.edittxtPartnerId.text.toString().trim()
    val pass = binding.editTextTextPassword.text.toString().trim()
    viewModel.login(
        clientIdentifier,
        Integer.parseInt(device),
        lang,
        Integer.parseInt(partn),
        pass
    )



    val rootObject = JSONObject()
    rootObject.put("ClientIdentifier", clientIdentifier)
    rootObject.put("DeviceType", device)
    rootObject.put("LanguageId", lang)
    rootObject.put("PartnerId", partn)
    rootObject.put("Password", pass)
    encrypt(rootObject.toString(), publicKey)

    val encrypted = encrypt(rootObject.toString(), publicKey)
    return RequestBody.create(
        "application/json; charset=utf-8".toMediaTypeOrNull(),
        "{\r\n    \"Data\":\"$encrypted\"\r\n}"
    )
}

In another class

private fun <Request> getRetrofitClient(authenticator: Authenticator? = null): OkHttpClient {

    return OkHttpClient.Builder()
        .addInterceptor { chain ->
            chain.proceed(chain.request().newBuilder().also {
                it.addHeader("Accept", "application/json")
                it.method("POST", LoginFragment().reqBody())      //Error shows on this

            }.build())
        }.also { client ->
            authenticator?.let { client.authenticator(it) }
            if (BuildConfig.DEBUG) {
                val logging = HttpLoggingInterceptor()
                logging.setLevel(HttpLoggingInterceptor.Level.BODY)
                client.addInterceptor(logging)
            }
        }.build()

}

Hey guys hitting an issue trying to inject into a Worker with Hilt 🧵

hi all, is this right way to declare dependency for coroutine dispatcher using KOIN , i'm worried about this as Dispatcher.IO and Dispatcher.Default are of same type while Main is of different type. This might be ambiguous

val diCoroutineModule = module {
    single { <http://Dispatchers.IO|Dispatchers.IO>  }
    single { Dispatchers.Main }
    single { Dispatchers.Default }
}

Something similar ins HILT

@InstallIn(SingletonComponent::class)
@Module
object CoroutinesModule {

    @DefaultDispatcher
    @Provides
    fun providesDefaultDispatcher(): CoroutineDispatcher = Dispatchers.Default

    @IoDispatcher
    @Provides
    fun providesIoDispatcher(): CoroutineDispatcher = <http://Dispatchers.IO|Dispatchers.IO>

    @MainDispatcher
    @Provides
    fun providesMainDispatcher(): CoroutineDispatcher = Dispatchers.Main

    @MainImmediateDispatcher
    @Provides
    fun providesMainImmediateDispatcher(): CoroutineDispatcher = Dispatchers.Main.immediate
}

Are there any kotlin libraries like SwiftyJSON for swift. I'm looking at JSON parsing libraries and they all seem to need a defined class to parse json strings to. SwiftyJSON was pretty useful as I didnt need to declare data classes and could just build objects from http responses with out having to decode each request i made. Ah looks like i can do it with

Klaxon().parse<Map<String,Any>>(jsonString)!!

or

var map: Map<String, Any> = HashMap()
map = Gson().fromJson(jsonString, map.javaClass)

I know this is off topic but does anyone know names of these icons / where to find them , I've tried everywhere

Hi all! Anyone know a library to work with android contacts, or at least a good example / tutorial? I've found a blog post on how to load a list fast, but it's only for phones / emails, and contacts app has labels, address, connections (duo, whatsapp)... and I cannot find an easy solution that provides all info

Hello, everybody, I've a question, but it's a little bit difficult. I get an error " kotlin.UninitializedPropertyAccessException: lateinit property binding has not been initialized". binding cannot initialized in getRetrofitClient(). Is there any way or other technologies to fix this issue? Thanks in advance.

class LoginFragment : Fragment() {

    private lateinit var binding: FragmentLoginBinding
    private val viewModel: AuthViewModel by viewModels()
    /* private val viewModel:AuthViewModel by lazy{
         ViewModelProvider(this).get(AuthViewModel::class.java)

     }*/



    @RequiresApi(Build.VERSION_CODES.O)
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = FragmentLoginBinding.inflate(inflater, container, false)
     ........
   }

  fun reqBody(): String {

        Log.d("LogFrag", "reqBody's binding$binding")

        val clientIdentifier = binding.edittxtClientIdentifier.text.toString().trim()
       
        val pass = binding.editTextTextPassword.text.toString().trim()

        viewModel.login(
            clientIdentifier,
            pass
        )

        val rootObject = JSONObject()
        rootObject.put("ClientIdentifier", clientIdentifier)
        rootObject.put("Password", pass)
        encrypt(rootObject.toString(), publicKey)

        val encrypted = encrypt(rootObject.toString(), publicKey)

        return encrypted
    }

fun <Request> getRetrofitClient(authenticator: Authenticator? = null): OkHttpClient {
 
    val finalEncr=reqBody()                //Error shows on this
      
    val body = "{\r\n    \"Data\":\"$finalEncr\"\r\n}"
        .toRequestBody("application/json; charset=utf-8".toMediaTypeOrNull())


    return OkHttpClient.Builder()
        .addInterceptor { chain ->
            chain.proceed(chain.request().newBuilder().also {
                it.addHeader("Accept", "application/json")
                it.method("POST", body)

            }.build())
        }.also { client ->
            authenticator?.let { client.authenticator(it) }
            if (BuildConfig.DEBUG) {
                val logging = HttpLoggingInterceptor()
                logging.setLevel(HttpLoggingInterceptor.Level.BODY)
                client.addInterceptor(logging)
            }
        }.build()
}

Hey guys!.. Please can you suggest a way on how to pass object in navigation compose

I defined onClick="internal" in button and when I use fun internal(v:VIEW) {} then it is working but when I define function like fun internal() {} then it isn't working. Can anyone explain why it is so ?

Trying use paging 3 lib with filter I cannot explain why it crashed if I don’t insert in between .cachedIn(viewModelScope)

val repoResult: Flow<PagingData<Repo>> = queryFlow.filterNotNull()
        .flatMapLatest { query ->
            repository.getSearchResultStream(query)
        }
        //.cachedIn(viewModelScope) //crash without
        .combine(filterFlow) { page, filter ->
            page.filter {
                it.description?.contains(filter, true) ?: false
            }
        }

    lifecycleScope.launch {
            viewModel.repoResult.collectLatest {
                adapter.submitData(it)
            }
    }

crash is java.lang.IllegalStateException: Attempt to collect twice from pageEventFlow, which is an illegal operation. Did you forget to call Flow<PagingData<*>>.cachedIn(coroutineScope)?

Hello, everybody, I've a question. I get an error " kotlin.UninitializedPropertyAccessException: lateinit property binding has not been initialized".  binding cannot initialized in getRetrofitClient().  What mistake did I make? Or there any way or other technologies to fix this issue?  If I don't use the 2nd line of getRetrofitClient(), the app works. Thanks in advance.

lass LoginFragment : Fragment() {

    private lateinit var binding: FragmentLoginBinding
    private val viewModel: AuthViewModel by viewModels()
    /* private val viewModel:AuthViewModel by lazy{
         ViewModelProvider(this).get(AuthViewModel::class.java)
     }*/

    @RequiresApi(Build.VERSION_CODES.O)
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        binding = FragmentLoginBinding.inflate(inflater, container, false)
     ........
      return binding.root
   }

  fun reqBody(): String {

        Log.d("LogFrag", "reqBody's binding$binding")

        val clientIdentifier = binding.edittxtClientIdentifier.text.toString().trim()

        val pass = binding.editTextTextPassword.text.toString().trim()

        viewModel.login(
            clientIdentifier,
            pass
        )

        val rootObject = JSONObject()
        rootObject.put("ClientIdentifier", clientIdentifier)
        rootObject.put("Password", pass)
        encrypt(rootObject.toString(), publicKey)

        val encrypted = encrypt(rootObject.toString(), publicKey)

        return encrypted
    }



fun <Request> getRetrofitClient(authenticator: Authenticator? = null): OkHttpClient {

    val finalEncr=reqBody()                //Error shows on this

    val body = "{\r\n    \"Data\":\"$finalEncr\"\r\n}"
        .toRequestBody("application/json; charset=utf-8".toMediaTypeOrNull())

return OkHttpClient.Builder()
        .addInterceptor { chain ->
            chain.proceed(chain.request().newBuilder().also {
                it.addHeader("Accept", "application/json")
                it.method("POST", body)

            }.build())
        }.also { client ->
            authenticator?.let { client.authenticator(it) }
            if (BuildConfig.DEBUG) {
                val logging = HttpLoggingInterceptor()
                logging.setLevel(HttpLoggingInterceptor.Level.BODY)
                client.addInterceptor(logging)
            }
        }.build()
}

class RemoteDataSource {

    @RequiresApi(Build.VERSION_CODES.O)
    fun <Api> buildApi(
        api: Class<Api>,
        context: Context
    ): Api {

        val authenticator = TokenAuthenticator(context, buildTokenApi())
        Log.d("RemoteDataSource", "buildApi")

        return Retrofit.Builder()
            .baseUrl(BASE_URL)
            .client(LoginFragment().getRetrofitClient<Any>(authenticator))
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(api)
    }

@RequiresApi(Build.VERSION_CODES.O)
    fun buildTokenApi(): TokenRefreshApi {
        Log.d("RemoteDataSource", "buildTokenApi")

        return Retrofit.Builder()
            .baseUrl(BASE_URL)
            .client(LoginFragment().getRetrofitClient<Any>())
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(TokenRefreshApi::class.java)
    }

}

I have a function that returns a live data such as

fun getLiveData(): LiveData<Result?> { return mResult }

where mResult is just a simple POJO. I am confused a bit about how kotlin interprets the return type for this function. I would imagine this to be non-null but when I try to call it, it forces me to use the null-safe operator "?.". If I wanted this to be nullable, I would imagine the return type would be

LiveData<Result?>?

with the appended "?"

Hello, everybody, I've a question. I need that getUser() receives argument only from an EditText's value.  How can I do it? Using SharedPreferences?  Thanks in advance.

interface AuthApi : BaseApi {
    @FormUrlEncoded
    @PUT("{PartnerId}/api/Main/LoginClient")
    suspend fun login(
        @Field("email") email: String,
        @Path("PartnerId") partnerId:String,
    ): LoginResponse
}
interface UserApi : BaseApi{
    @GET("{PartnerId}/api/Main/LoginClient")
    suspend fun getUser(@Path("PartnerId")partnerId:Int): LoginResponse
}

class UserRepository @Inject constructor(
    private val api: UserApi
) : BaseRepository(api) {
    suspend fun getUser() = safeApiCall { api.getUser(0) }    <---getUser()'s argument must be  EditText's value
}

How can we update single item in paging list (paging 3)? I wants to update paging list (like property of object) when user click on like button

I am still getting this lint error even though I am using Fragment 1.3.6. Any ideas?

How can I use KMM in Android Studio with Windows 10 ? Because I can see the plugin available is only for macOS so can anyone tell how I can integrate KMM in my existing or new projects with Windows.