kotlin-coroutines

问题 I have written this code snippet to download image files from firebase storage to local storage. contentResolver.openOutputStream(uri)?.use { ops -> // * Firebase.storage.getReferenceFromUrl(model.mediaUrl).stream.await().stream.use { ips -> val buffer = ByteArray(1024) while (true) { val bytes = ips.read(buffer) // * if (bytes == -1) break ops.write(buffer, 0, bytes) // * } } } In the marked lines, android studio is giving me Inappropriate blocking method call warning, highlighting

问题 I'm testing api that returns result using suspending function with MockWebServer, but it does not work with runBlockingTest, testCoroutineDispatcher, testCorounieScope unless a launch builder is used, why? abstract class AbstractPostApiTest { internal lateinit var mockWebServer: MockWebServer private val responseAsString by lazy { getResourceAsText(RESPONSE_JSON_PATH) } @BeforeEach open fun setUp() { mockWebServer = MockWebServer() println("AbstractPostApiTest setUp() $mockWebServer") }

问题 I'm testing api that returns result using suspending function with MockWebServer, but it does not work with runBlockingTest, testCoroutineDispatcher, testCorounieScope unless a launch builder is used, why? abstract class AbstractPostApiTest { internal lateinit var mockWebServer: MockWebServer private val responseAsString by lazy { getResourceAsText(RESPONSE_JSON_PATH) } @BeforeEach open fun setUp() { mockWebServer = MockWebServer() println("AbstractPostApiTest setUp() $mockWebServer") }

问题 I am trying a very simple tentative to insert and select to/from MySql using vertx for the first time. It is funny to me that I can build and debug the application but I never get either ar.succeeded or failed. How to execute the insert and select bellow? Do I have to enclose somehow client.query and subscribe it? I am complete stuck. All examples on internet I see follow this approach. package com.mybank import io.vertx.kotlin.mysqlclient.mySQLConnectOptionsOf import io.vertx.kotlin

问题 I am trying a very simple tentative to insert and select to/from MySql using vertx for the first time. It is funny to me that I can build and debug the application but I never get either ar.succeeded or failed. How to execute the insert and select bellow? Do I have to enclose somehow client.query and subscribe it? I am complete stuck. All examples on internet I see follow this approach. package com.mybank import io.vertx.kotlin.mysqlclient.mySQLConnectOptionsOf import io.vertx.kotlin

问题 I'm starting to learn Kotlin Flow and Coroutines but I do not know how to make the code below works. What am I doing wrong? interface MessagesListener { fun onNewMessageReceived(message: String) } fun messages(): Flow<String> = flow { val messagesListener = object : MessagesListener { override fun onNewMessageReceived(message: String) { // The line below generates the error 'Suspension functions can be called only within coroutine body' emit(message) } } val messagesPublisher =

问题 I'm starting to learn Kotlin Flow and Coroutines but I do not know how to make the code below works. What am I doing wrong? interface MessagesListener { fun onNewMessageReceived(message: String) } fun messages(): Flow<String> = flow { val messagesListener = object : MessagesListener { override fun onNewMessageReceived(message: String) { // The line below generates the error 'Suspension functions can be called only within coroutine body' emit(message) } } val messagesPublisher =

问题 I'm starting to learn Kotlin Flow and Coroutines but I do not know how to make the code below works. What am I doing wrong? interface MessagesListener { fun onNewMessageReceived(message: String) } fun messages(): Flow<String> = flow { val messagesListener = object : MessagesListener { override fun onNewMessageReceived(message: String) { // The line below generates the error 'Suspension functions can be called only within coroutine body' emit(message) } } val messagesPublisher =

问题 Recently was introduced the class StateFlow as part of Kotlin coroutine. I'm currently trying it and encounter an issue while trying to unit test my ViewModel. What I want to achieve: testing that my StateFlow is receiving all the state values in the correct order in my ViewModel. My code is as follow: ViewModel: class WalletViewModel(private val getUserWallets: GetUersWallets) : ViewModel() { val userWallet: StateFlow<State<UserWallets>> get() = _userWallets private val _userWallets:

问题 Recently was introduced the class StateFlow as part of Kotlin coroutine. I'm currently trying it and encounter an issue while trying to unit test my ViewModel. What I want to achieve: testing that my StateFlow is receiving all the state values in the correct order in my ViewModel. My code is as follow: ViewModel: class WalletViewModel(private val getUserWallets: GetUersWallets) : ViewModel() { val userWallet: StateFlow<State<UserWallets>> get() = _userWallets private val _userWallets: