how to find multi setter with Spring Boot BeanWrapper I hava a class Packet.java(can't modify) in a package. public class Packet implements java.io.Serializable, Cloneable { private static final AtomicLong ID_ATOMICLONG = new AtomicLong(); private Long id = ID_ATOMICLONG.incrementAndGet(); } I use own class LoginPacket.kt (can modify) class LoginPacket : Packet () { var id = "" ( this name must be id ) fun parsePacket(input: String): Boolean { val map = HashMap() map["id"] = "5d6ff3433354b4d43076419" var wrapper:...

Accessing source code from Kotlin annotation processor I'm trying to access the source code associated with annotation using kapt. I see that there is compiler tree API to achieve this in java. How can I achieve the same using Kotlin. Here is an example of what my annotation looks like @SomeAnnotaion private val someFiled = { //I want to read everything that goes here } I want to read all the source code...

Why am I getting a "Caused by: java.lang.ClassCastException: java.lang.Float cannot be cast to java.lang.String" error here? I am using android with kotlin and I am getting this error. "Caused by: java.lang.ClassCastException: java.lang.Float cannot be cast to java.lang.String" in line 60. I don't see why it thinks there is a Float to begin with. Here is line 60: val bal:String = sp.getString("Balance", "0.00")!!.toString() where sp is an instance of SharedPreferences. Here is my full code: package com.applications.darshan.piggybank import android.support.v7.app.AppCompatActivity import android.os.Bundle...

Activity finished after getting result with onActivityResult Scenario: MainActivity (we'll call it activity A) has 3 fragments and starts activity B. Activity B then startActivityForResult (activity C). Problem is when setting result OK on activity C and calling onBackPress, startActivityForResult is getting called on Activity B but activity B is then closed after a few seconds. Activity A -> Activity B -> Activity C (for Result), Result OK, finish Then -> Activity B onActivityResult is called with Result OK but activity B finished and return to...

Error when trusting HTTPS certificate using okhttp in Kotlin I have found many related questions on this and I have tried many options. But I'm not able to resolve it. I want to disable certification checking on making api call using okhttp.Below is the code that I tried import okhttp3.OkHttpClient import java.security.cert.CertificateException import javax.net.ssl.SSLContext import javax.net.ssl.TrustManager import javax.net.ssl.X509TrustManager class UnsafeOkHttpClient { companion object { fun getUnsafeOkHttpClient():...

groupby in kotlin how it works I have the following class data class ExtraAttributeFlatGroupEntity( @ColumnInfo(name = ID) @SerializedName(ID) val id: Int, @ColumnInfo(name = TYPE) @SerializedName(TYPE) val type: String, @ColumnInfo(name = NAME_AR) @SerializedName(NAME_AR) val nameAr: String, @ColumnInfo(name = NAME_EN) @SerializedName(NAME_EN) val nameEn: String, @ColumnInfo(name = SYSTEM_NAME) @SerializedName(SYSTEM_NAME) val systemName: String,...

Can't provide dependency from subcomponent I'm new in Dagger2 and learn it in test project. I want to provide SuperObject from subcomponent with custom scope but got error: [Dagger/MissingBinding] ru.rsb.daggerproject.objects.SuperObject cannot be provided without an @Inject constructor or an @Provides-annotated method. I aleready indicated method provides SuperObject with @Provides annotation. Please explain me my mistakes. I have such graph: @Singleton @Component(modules = [AndroidInjectionModule::class, ModuleA::class,...

How to correctly do array request in volley I'm trying to do get request and get array in json but i'm having error like this: org.json.JSONException: Value [] of type org.json.JSONArray cannot be converted to JSONObject here's my request code: private fun getStudents(endLink: String) { val request = JSONObject() val studentLink = "https://192.168.1.1/getStudents.php?idEntity=" val linkFull = studentLink.plus(endLink) val jsArrayRequest = JsonObjectRequest(Request.Method.GET, linkFull, request, Response.Listener {...

Add draggle text on image like instagram does in android I am creating an image editor like instagram where you can add text or draw over image but i am not able to figure out how to do so. Any suggestions?

Android ROOM save Map<String, Object> I have a model like that @Entity(tableName = "allrates") class Data( @ColumnInfo(name = "rates") @SerializedName("rates") @Expose var rates: Map, @ColumnInfo(name = "start") @SerializedName("start_at") @Expose var startDate: String, @ColumnInfo(name = "end") @SerializedName("end_at") @Expose var endDate: String, @SerializedName("base") @Expose var base: String,...

Add new element to HashMap but not found when query - Kotlin I am trying to add new list element to HashMap based on key value and its value is nested list. Here is class that I initialized: private val portalDummyData = listOf( Portal( id = "p1", address = "Moringa", clientID = "c1", clientSecret = "cs1", agents = listOf( Agent( "agent1", "agent", email, listOf( "p1" ) ), Agent( "agent2", "agent2", email, listOf( "p1", "p2" ) ) ) ) ) private val portalHashMap = HashMap() init {...

How to start executing of Kotlin Coroutine immediately I want to start a coroutine immediately. I have a piece of code: class SampleActivity : AppCompatActivity(), CoroutineScope { private var job: Job = Job() override val coroutineContext: CoroutineContext get() = Dispatchers.Main + job override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) Log.d("SampleActivity", "Before launch") launch { Log.d("SampleActivity", "Inside coroutine") }...

Dynamically colorizing drawable in android studio (kotlin) I am trying to dynamically colorize an image of a meadow after the time of day (hour). Basically, I want to check for time of day, and change the hue/brightness of the meadow to a custom (pre-set) setting. For example, at midday it is the , at nighttime I wish to give it a blue hue and darken it. Similar for other times of day. I am completely new to android studio and kotlin, and I can't quite...

Order of times and addition functions in a java/kotlin equation I'm completing the Kotlin Koans Operators Overloading exercise and am mean to implement a date arithmetic like so: today + YEAR * 2 + WEEK * 3 + DAY * 5 My question is, will this operate like a regular mathematical equation where multiplication will be executed first? today + (YEAR * 2) + WEEK * 3 + (DAY * 5) today.add(YEAR * 2).add(WEEK * 3).add(DAY * 5) If...

Onclick listener in Recyclerview of Popup Window I am trying to Make Popup Window where user can see Recyclerview(List of Comments). But i want to add 2 buttons in it for upvote and downvote for comments. I have completed view of Recyclerview and its showing properly as i want but i can not add buttons in recyclerview. Here is my Code. Popup Window Code from my Activity : lateinit var getAllcomment : GetAllCommentsAdapter lateinit var upVote : View.OnClickListener lateinit var downVote : View.OnClickListener...

Should we always nullcheck Context inside a fragment? I have a very simple on click listener in my fragment: button?.setOnClickListener { val intent = Intent(MyActivity.createIntent(context!!)) // crash here because context is null startActivity(intent) } Crashlytics shows that some users are getting KotlinNullPointerException crashes when clicking on this specific button. Now I know the problem is happening because I am force unwrapping the Context. If I simply wrapped it inside a nullcheck, it would not crash. But I assume that...

Multiple extras in Kotlin I'm trying to do an intent to another activity with multiple extras but it seems that the last one overwrites the previous ones. I've tryied with Bundle but nothing changes. I get values from the database. The code from the first activity: val intent = Intent(this, PDPActivity::class.java) intent.putExtra(EXTRA_IMAGES, productItem.allImages[0]) intent.putExtra(EXTRA_NAME, productItem.name) intent.putExtra(EXTRA_PRODUCTID, productItem.productID)...

Custom websocket handshake? Alright, so I have a ServerEndpoint and a ClientEndpoint exchanging json messages via the respective encoders/decoders. I now want to add the ability for a client to choose a unique user name. Let's say I have a fun isNameAvailable(name:String):Boolean (on the server, of course). Haven't tried it, but I do think I could use a WebFilters to guard access to websocket endpoints.(e.g. let's say I connect to ws://localhost:8888/ws/foo and I add a webfilter that intercepts all accesses to /ws/*)...

Retrofit2: Add post parameter into interceptor Inside my Android kotlin app i'm calling some apis by using retrofit2 like @FormUrlEncoded @POST("something/some") fun callMyApi( @Field("myField") myField: String ): Deferred Now i need to add some common post params to all my api request (and keep the specific ones for each call, in this case i need to keep "myField"), so i'm using an interceptor: val requestInterceptor = Interceptor { chain -> val newRequest = chain.request() .newBuilder() .post(...

android studio kotlin anko startActivity crashes application I am trying to learn the ANKO libraray for android development in kotlin. And my application crashes when i try to open another activity through the startActivity function provided. I assume the issue does not have anything to do with the actual startActivity function call. https://github.com/Kotlin/anko/wiki/Anko-Commons-%E2%80%93-Intents. This is my MainActivity package...

Kotlin collection functions equivalent in swift So im coming from a rich kotlin background and currently diving into iOS development using swift. And I'm really missing my collection functions that Kotlin provides us natively, like sublist, first, I think it's called the stream api in java. Is there an swift equivalent for this in the form of a Pod?

Good way store and keep ordered list up to date in firebase cloud store I need to store a list of objects which can be rearranged in any order by a user by dragging and dropping the items. What I'm trying to figure out is how to do this in the most optimal way. Lets say I have the following array of objects. [ { id: XXX1 name: item1 order: 1 },{ id: XXX2 name: item2 order: 2 },{ id: XXX3 name: item3 order: 3 },{ id: XXX4 name: item4 order: 4 }...

How do you pass a nullable list of objects with Parcelable I want to pass a custom object that has a nullable list of other custom objects. How do I go around passing this. I am using Kotlin writeTypedList and createTypedArrayList do not work when the list is null

Android Retrofit Alternative For 2019 I am going to build another Android app from scratch (Kotlin/Koin/MVVM/Coroutines) and just found out that Retrofit is 7 years old and also uses things that I cannot consider as a good practice - annotations(why do we need that if we have Kotlin DSL now), code generation etc. I am Googled for a few days before ask it here(I know that asking of opinion here is not good practice) but I have no choice. Thanks.

Kill Runnable process I have a function of simple timer. That function is called in OnCreate(). When I go to another activity and come back my activity with timer is recreated and timer starts working 2x faster. I tried to kill removeCallbacks from my Runnable but it doesn't work. How can I kill my Runnable to prevent from stacking. private fun onTimerStart(){ ed.putBoolean("thread", true).apply() mRunnable = Runnable { seconds = sp.getLong("SECONDS",0) try {...

Subject and observer changes to be seen by both in Kotlin How can text entered by subject and observer on their individual screens(ie same activity on diff screens)be visible to both in a recyclerview in activity. For eg:User 1 enters apple and user2 enters mango so the activity should show apple,mango.Then User 1 enters bat and user2 enters ball,so the activity should now show apple,mango,bat,ball. I know how to create recyclerview but is there a way to get all changes made by sub n observer. Can this be done using observer pattern in kotlin?...

kotlin: Acceder a button y textview de un fragment desde activity con viewPager Estoy intentando empezar con ViewPager en Android con Kotlin. Lo que me ocurre es que tengo tres fragmentos, que cargo en un ViewPagers, y no puedo acceder de ninguna forma a los botones de los fragments ni a los textview para cambiar su valor. esto es el fragment: package com.example.jose.juegopreguntas import android.content.Context import android.net.Uri import android.os.Bundle import android.support.v4.app.Fragment import android.view.LayoutInflater import android.view.View import...

How to check if an app is 100% Kotlin, not hybrid (Java and Kotlin) I have an app that was created with Java first and now is migrated to Kotlin. How could I have a confirmation that my app is now 100% Kotlin and is not anymore a hybrid app (with Java and Kotlin)? There is something that is could make me prove that is 100% Kotlin?/ is a line of code that is supposed to show this? Thanks.

How to set a text style depending on condition? I need to make a text style bold|italic or italic depending on flag value. Now I am trying these variants: android:textStyle="@{item.current ? bold|italic : italic}" android:textStyle="@{item.current ?

bold|italic

:

italic

}" android:textStyle="@{item.current ? Typeface.BOLD_ITALIC : Typeface.ITALIC}" But both don't work, of course. How to make it correctly? ADDED I resolved the issue using a custom binder temporarily but I wanna know if it has built-in way. object...

Android App crashes without any Stack Trace Error I just started with that new App and wanted to see if I get any Response by Retrofit and print it in a TextView. But the App crashes without any Stack Trace so no Exception ... just nothing. I have a Retrofit interface and a "Factory" that creates the Request everything runs in a different Thread via Kotlin Coroutine. class MainActivity : AppCompatActivity() { private lateinit var debugTextView: TextView override fun onCreate(savedInstanceState: Bundle?) {...